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1. Adaptation of genetically monomorphic bacteria: evolution of copper resistance through multiple horizontal gene transfers of complex and versatile mobile genetic elements

Author: Aude Chabirand, Christian Vernière, Pierre Lefeuvre, Olivier Pruvost, Claudine Boyer, Pierre Grygiel, Damien Richard, Virginie Ravigné, Adrien Rieux, Marie Annabelle Terville, Isabelle Robène, B.I. Canteros, Stéphanie Javegny, Benoit Facon, Karine Boyer, Peuplements végétaux et bioagresseurs en milieu tropical (UMR PVBMT), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Université de La Réunion (UR), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Agence nationale de sécurité sanitaire de l'alimentation, de l'environnement et du travail (ANSES), Centre de Biologie pour la Gestion des Populations (UMR CBGP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut National de la Recherche Agronomique (INRA), Instituto Nacional de Tecnología Agropecuaria (INTA), Biologie et Génétique des Interactions Plante-Parasite (UMR BGPI), Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA), European Regional Development Fund (ERDF), European Agricultural Fund for Rural Development (EAFRD), Conseil Departemental de la Reunion, Region Reunion, Etat francais, French Agropolis Foundation (Labex Agro - Montpellier, E-SPACE) : 1504-004, ANSES, CIRAD, Département Systèmes Biologiques (Cirad-BIOS), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro), The European Regional Development Fund (ERDF) and European Agricultural Fund for Rural Development (EAFRD), Conseil Departemental de la Reunion, Region Reunion, Etat francais, the French Agropolis Foundation (Labex Agro - Montpellier, E-SPACE project number 1504-004), ANSES and CIRAD provided financial support., ANR-10-LABX-0001,AGRO,Agricultural Sciences for sustainable Development(2010), and Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)
Subjects: 0301 basic medicine, Citrus, heavy metal resistance, Xanthomonas campestris citri, Xanthomonas citri, Plasmid, Genetics, biology, Adaptation, Physiological, Épidémiologie, MESH: Copper, Stenotrophomonas, PCR, Organisme génétiquement modifié, Cuivre, Citrus canker, mobile DNA, Martinique, MESH: Interspersed Repetitive Sequences, résistance aux maladies, DNA, Bacterial, Séquence nucléotidique, Xanthomonas, Gene Transfer, Horizontal, Genotype, Argentina, Bacterial genome size, MESH: Xanthomonas, 03 medical and health sciences, stomatognathic system, plasmid, MESH: Drug Resistance, Bacterial, Drug Resistance, Bacterial, protection des plantes, contemporary adaptation, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, Adaptation, Ecology, Evolution, Behavior and Systematics, H20 - Maladies des plantes, Plant Diseases, Résistance aux pesticides, amélioration génétique, Résistance aux produits chimiques, Xanthomonadaceae, Biologie moléculaire, Microsatellite, biology.organism_classification, Interspersed Repetitive Sequences, resistance to diseases, 030104 developmental biology, Genetics, Population, Gène, Genes, Bacterial, Évaluation, U30 - Méthodes de recherche, Mobile genetic elements, Reunion, Copper, crop protection, Microsatellite Repeats
Abstract: Copper-based compounds are widely used in integrated pest management (1PM) programs aiming at controlling agriculturally important plant bacterial pathogens and the latter have adapted in response to this selective pressure. Copper resistance of Xanthomonas citri pv. citri (Xcc), a major citrus pathogen worldwide causing Asialie citrus canker, was first observed in Argentina two decades ago and subsequently reported as a copLAB-based, plasmid-encoded system. The emergence of resistant strains has since been reported in Réunion (South West lndian Ocean) and Martinique (Eastern Caribbean Sea). Disease severity was found markedly increased in groves established with susceptible cultivars and infected with copper-resistant Xcc. Using tandem repeat-based genotyping and copLAB PCR, we demonstrated that the genetic structure of the copperresistant strains from these three regions was made up of two distant clusters and varied for the detection of copLAB amplicons. ln order to investigate this pattern more closely, we sequenced six copper-resistant Xcc strains from Argentina, Martinique and Réunion, together with reference copper-resistant Xanthomonas and Stenotrophomonas strains using long-read sequencing technology. Genes involved in copper resistance were found to be strain-dependent with the nove! identification in Xcc of copABCD and a eus heavy metal efflux resistance-nodulation-division system. The genes providing the adaptive trait were part of a mobile genetic element similar to Tn3-like transposons and included in a conjugative plasmid. The mining of ail bacterial genomes available from public databases suggested that the mobile elements containing copper resistance genes and their plasmid environments were primarily detected in the Xanthomonadaceae family.
Published: 2016
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2. Tree recruitment after native frugivore extinction? A field experiment to test the impact of fruit flesh persistence in a tropical oceanic island

Author: Sébastien Albert, Olivier Flores, Mikael Stahl, Florian Guilhabert, Dominique Strasberg, Peuplements végétaux et bioagresseurs en milieu tropical (UMR PVBMT), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Université de La Réunion (UR)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Observatoire des Sciences de l'Univers de La Réunion (OSU-Réunion), Institut national des sciences de l'Univers (INSU - CNRS)-Université de La Réunion (UR), and The Reunion National Park and the French National Office (ONF) provided permits for site access in protected areas. Logistic support was provided by CIRAD and the field station of Mare Longue, funded by the P.O.E., Reunion National Park and OSU Reunion. This research was financed by Region Reunion and FEDER through FEDER 1.16 ECOFORRUN.
Subjects: Janzen-Connell hypothesis, Sapotaceae, dormancy, seed predation, frugivore extinction, island biology, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, Biological invasion, Ecology, Evolution, Behavior and Systematics
Abstract: The loss of large frugivores leads to seed dispersal loss and regeneration failure of numerous large-seeded trees near mother trees. Although Janzen–Connell effects are considered as the primary underlying cause, other factors remain understudied. Here, we used a field experiment to test the impact of flesh persistence on the recruitment of two large-seeded Sapotaceae species that lost their dispersers. In the rainforest of Mare Longue (Réunion), we sowed 3840 seeds in a four-factor design: seed treatment (seed cleaning; flesh persistence), canopy closure (understory; gap), year of sowing (01/2018; 11/2019) and species (Labourdonnaisia calophylloides, Mimusops balata). We also used camera traps to evaluate the impact of extant vertebrates. Seed treatment was by far the most influential factor: flesh persistence led to seedling recruitment divided by 3,2 on average, mainly due to failure of germination or seedling emergence. There were also significant variations in recruitment between species, years and canopy closure levels, notably due to the behaviour of the invasive fauna, especially giant snails that could unexpectedly restore recruitment by feeding on fruit flesh. Together, our results demonstrate strongly depleted recruitment due to flesh persistence and the importance of field experiments to understand the processes at work in complex ecosystems with novel plant–animal interactions.
Published: 2022
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3. The interacting effect of habitat amount, habitat diversity and fragmentation on insect diversity along elevational gradients

Author: Joëlle Sadeyen, Enric Frago, Marie-Ludders Moutoussamy, Lala Harivelo Ravaomanarivo, Niry Tiana Dianzinga, Peuplements végétaux et bioagresseurs en milieu tropical (UMR PVBMT), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Université de La Réunion (UR)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Département Systèmes Biologiques (Cirad-BIOS), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Université d'Antananarivo, Centre de Biologie pour la Gestion des Populations (UMR CBGP), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Centre de Cooperation Internationale en Recherche Agronomique pour le Developpement : European 490 Union (EAFRD program), European 490 Union (ERDF program), Regional Council of Reunion, Departmental Council of the Region Reunion, French National Research Agency (ANR), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Université de Montpellier (UM)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro - Montpellier SupAgro, and Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)
Subjects: 0106 biological sciences, environmental gradient, [SDV]Life Sciences [q-bio], Beta diversity, Facteur climatique, 01 natural sciences, elevational gradient, Abiotic component, 0303 health sciences, Ecology, seasonality, Altitude, Facteur du milieu, respiratory system, Habitat, Échantillonnage, beta diversity, L20 - Écologie animale, Biodiversité, Land cover, Biology, 010603 evolutionary biology, thrips, 03 medical and health sciences, multi-scale analysis, medicine, Ecology, Evolution, Behavior and Systematics, 030304 developmental biology, Environmental gradient, fragmentation de l'habitat, Méthode statistique, Thysanoptera, fungi, alpha diversity, 15. Life on land, Seasonality, medicine.disease, barcoding, Taxon, 13. Climate action, insect, Alpha diversity, human activities
Abstract: Aim: Elevational gradients are a useful approach to evaluate how environmental factors affect animal diversity. Decades of studies on the elevation-diversity gradient have revealed that this gradient varies greatly with taxa and geographic regions. One potential explanation for this may be the dependence of the relationship on landscape features. We explore the impact of fragmentation, habitat diversity and habitat amount on insect diversity (alpha and beta) and abundance along elevational gradients. We hypothesize that insect diversity and abundance will relate negatively with elevation, but positively with these landscape features. We also hypothesize that landscape features will interact in a way that the positive effect of a given variable on insect diversity may be offset by the others. Location: Reunion Island (Indian Ocean). Taxon: The insect order thrips (Thysanoptera). Methods: Insects were sampled along replicated elevational gradients, and at each sampling plot landscape features and abiotic variables were estimated within buffers surrounding the site. Insect alpha diversity was estimated using abundance-based rarefaction methods, whereas beta diversity was estimated calculating the "Local contributions to beta diversity" metric. The effect of elevation, rainfall, landscape features and their interactions was assessed on insect alpha and beta diversity and abundance during two consecutive seasons using linear mixed effects models. Results: We found that thrips alpha and beta diversity was negatively related with elevation, but the relationship varied between seasons and rainfall regimes. Among the different landscape features considered, we found that habitat amount had the strongest effect on diversity. The effect of habitat amount on diversity, however, was offset in areas of low habitat (or land cover) diversity. Main conclusions: Generalizing the factors that underlie the elevation diversity gradient has become a cornerstone in ecological theory because it can help to understand the impact of human activities on diversity. Here we show that taking landscape information into account may help to fulfil this objective because landscape effects co-vary with elevation with often intricate consequences for diversity.
Published: 2020
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4. Selection of Microbial Targets for Treatments to Preserve Fresh Carrot Juice

Author: Charlène Leneveu-Jenvrin, Baptiste Quentin, Fatima-Ezzahra Messaaf, Mathilde Hoarau, Marc Lebrun, Fabienne Remize, Démarche intégrée pour l'obtention d'aliments de qualité (UMR QualiSud), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Avignon Université (AU)-Université de La Réunion (UR)-Institut Agro Montpellier, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Montpellier (UM), Département Performances des systèmes de production et de transformation tropicaux (Cirad-PERSYST), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Sciences Pour l'Oenologie (SPO), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Montpellier, and European Union and Region Reunion through the FEDER programRE0002361
Subjects: [SDV]Life Sciences [q-bio], food and beverages, yeasts, lactic acid bacteria, shelf life, spoilage, fresh juice, [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition, Food Science
Abstract: International audience; Fresh carrot juice presents nutritional and organoleptic qualities which have to be preserved. However, it is a fast perishable beverage, and its low-acidic pH promotes the development of foodborne pathogens and spoilage microorganisms. This study aims to assess the modification and variability of physicochemical and microbial indicators during storage of carrot juice, and to isolate and select microorganisms to be used as promoters of spoilage to quantify the effect of preservation treatments. To achieve that, 10 batches of carrot Daucus carota cv. Maestro juice were prepared independently, stored up to 14 days at 4 °C and analyzed. Volatile compound composition differed mainly according to the analyzed batch. During storage, an increase of the content of ethanol, ethyl acetate or 2-methoxyphenol, which are produced by different microorganisms, was noticed. Isolation of bacteria revealed Pseudomonas, lactic acid bacteria, and enterobacteria, some of them provoking odor modification of carrot juice at 4 °C. Assays in carrot juice with isolated yeasts and molds showed the ability of Meyerozyma guillermondii to induce texture modification and some isolates, e.g., Pichia guillermondii, resulted in gas production. Selected isolates able to induce spoilage are useful to test preservative treatments of fresh carrot juice under controlled conditions.
Published: 2022
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5. Life history parameters and predation capacities of Nesidiocoris volucer: A new biological control agent for tomato crop

Author: Lucie Marquereau, Jean-Sébastien Cottineau, Olivier Fontaine, Frédéric Chiroleu, Bernard Reynaud, Hélène Delatte, Peuplements végétaux et bioagresseurs en milieu tropical (UMR PVBMT), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Université de La Réunion (UR)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Département Systèmes Biologiques (Cirad-BIOS), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Association Réunionnaise pour la Modernisation de l’Economie Fruitière, Légumière et HORticole (ARMEFLHOR), SARL La Coccinelle, and This work was funded by CIRAD, the French Ministry of Agriculture (MAAF), Region Reunion and the European Union: European Agricultural Funds for Rural Development (EAFRD).
Subjects: H01 - Protection des végétaux - Considérations générales, tropical area, predator, new biological control agent, tomato, Solanum lycopersicum, whiteflies, greenhouse, Agent de lutte biologique, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, Tetranychus, Ecology, General Medicine, H10 - Ravageurs des plantes, Prédateur, Nesidiocoris volucer, Insect Science, Cycle de développement, Prédation, Lutte biologique contre les ravageurs, Agronomy and Crop Science
Abstract: Whiteflies are one of the major pests of tomato under greenhouses, and their control partly relies on biocontrol strategies. Among those biocontrol agents, parasitoids or predators are widely used. However, the introduction of a biocontrol agent in a new area is not trivial. For that reason, we investigated the use of a tropical native mirid, Nesidiocoris volucer (Hemiptera: Miridae), for the biological control of whiteflies among other insect pests on tomato crops under greenhouses in the subtropical island of La Réunion, France. Nesidiocoris volucer life history traits and plant injury were examined. Nymphs developed and survived between 15 and 30°C and required on average 49.41 days at 15°C and on average 10.50 days at 30°C to develop (nymph survival >94%). At 25°C, each female produced on average 65 eggs. Nesidiocoris volucer was able to feed on several prey species, but performed better on whiteflies than on spider mites or thrips. No N. volucer feeding injury was observed on tomato. Nesidiocoris volucer has also been found in tropical countries of Africa, and we believe that the data presented on this natural enemy could be of great importance for the biocontrol of whiteflies in tropical areas.
Published: 2022
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6. Selection by UV Mutagenesis and Physiological Characterization of Mutant Strains of the Yeast Saprochaete suaveolens (Former Geotrichum fragrans) with Higher Capacity to Produce Flavor Compounds

Author: Alain Shum Cheong Sing, Melissa Tan, Héloïse Reiss, Thomas Petit, Yanis Caro, Jean-Marie François, Chimie et Biotechnologie des Produits Naturels (CHEMBIOPRO), Université de La Réunion (UR), Toulouse Biotechnology Institute (TBI), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Toulouse White Biotechnology (TWB), Region Reunion, and Europe for financial support
Subjects: Microbiology (medical), QH301-705.5, Saccharomyces cerevisiae, Mutant, yeast, volatile organic compounds (VOCs), UV, mutant, Plant Science, Article, Hydrolase, [SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology, Food science, Biology (General), Ecology, Evolution, Behavior and Systematics, Flavor, chemistry.chemical_classification, biology, Strain (chemistry), Chemistry, biology.organism_classification, Yeast, Amino acid, UVmutant, Enzyme
Abstract: Yeast volatile organic compounds (VOCs), i.e. low molecular weight organic acids, alcohols and esters, are considered as potential and sustainable sources of natural aromas that can replace commonly used artificial flavors in food and other industrial sectors. Although research generally focuses on the yeast Saccharomyces cerevisiae, other so-called unconventional yeasts (NCY) are beginning to attract the attention of researchers, particularly for their ability to produce alternative panels of VOCs. With this respect, a Saprochaete suaveolens strain isolated from dragon fruit in Reunion Island was shown to produce α-unsaturated esters from branched-chain amino acids (BCAAs) such as isobutyl, isoamyl or ethyl tiglate, which are rarely found in other yeasts strains. Given that β-oxidation allows the growth of S. suaveolens on BCAAs as sole carbon source, we developped a method based on UV mutagenesis to generate mutants that can no longer grow on BCAAs, while redirecting the carbon flow towards esterification of α-unsaturated esters. Among the 15,000 clones generated through UV irradiation, we identified nine clones unable to grow on BCAAs with one of them able to produce eight times more VOCs as compared to the wild-type strain. This higher production of α-unsaturated esters in this mutant strain coincided with an almost complete loss of enoyl-CoA hydratase activity of the β-oxidation pathways and with a twofold increase of acyl-CoA hydrolase with not significant changes in the enzymes of the Ehrlich pathway. Moreover, from our knowledge, it constituted the first example of VOCs enhancement in a microbial strain by UV mutagenesis.
Published: 2021
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7. Mitochondrial genomes reveal diverse lineages of Diaphorina citri Kuwayama (Hemiptera: Sternorrhyncha: Psyllidae) in Kenya and La Réunion

Author: Paul Holford, George A Beattie, Yijing Cen, Samira A. Mohamed, Susan E. Halbert, Yanjing Wang, Hélène Delatte, Bernard Reynaud, Jinming Lu, Zhejiang University, University of Florida [Gainesville] (UF), Florida State Collection of Arthropods, Division of Plant Industry/Entomology, Florida Department of Agriculture and Consumer Services, International Centre of Insect Physiology and Ecology (ICIPE), Peuplements végétaux et bioagresseurs en milieu tropical (UMR PVBMT), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Université de La Réunion (UR)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Pôle de Protection des Plantes (3P, IBiSA), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Université de La Réunion (UR)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Université de La Réunion (UR)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Département Systèmes Biologiques (Cirad-BIOS), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Université de La Réunion (UR), Western Sydney University, South China Agricultural University (SCAU), We are greatly thankful to the International Centre of Insect Physiology and Ecology for the sample collection in Kenya. We also appreciate Maeva Vinot and Francois Hervy for providing the DNA samples from La Reunion through funding by the EU (ERDF, Interreg V) and Region Reunion. We thank the Florida Department of Agriculture and Consumer Services, Division of Plant Industry for support of this work. We are grateful for the financial support provided by Science and Technology Major Project of Guangxi (Gui Ke AA18118046, Zhejiang A&F University impulse project (2019FR029), Science and Technology Project of Guangdong (2020A1414010043) and the National Key Research and Development Program of China (2018YFD0201502)., and European Project: ERDF
Subjects: 0106 biological sciences, Diaphorina citri, Population, Génétique mitochondriale, Zoology, Pathologie végétale, 010603 evolutionary biology, 01 natural sciences, Genome, Agent pathogène, génomique, La Réunion, Maladie des plantes, stomatognathic system, Asian citrus psyllid, Invasion, parasitic diseases, East africa, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, education, Ecology, Evolution, Behavior and Systematics, H20 - Maladies des plantes, education.field_of_study, Ecology, biology, Candidatus Liberibacter asiaticus, 010604 marine biology & hydrobiology, Haplotype, biology.organism_classification, Hemiptera, Sternorrhyncha, East Africa, Mitogenome, Bactérie gram négatif
Abstract: The sequences generated in this study were deposited in GenBank (Accession number: MW021146–MW021160).; International audience; The Asian citrus psyllid, Diaphorina citri, is a major threat to citrus production worldwide, as it transmits 'Candidatus Liberibacter asiaticus', the pathogen associated with the devastating Asian form of huanglongbing. The psyllid has spread widely from its native South Asia during the past 300 years, most recently to Africa. We report the first population genomic analyses of D. citri in Kenya and La Reunion based on next-generation sequencing of their mitochondrial genomes. We analyzed mitochondrial sequences of 264 D. citri individuals to establish genetic relationships among accessions from D. citri populations from Asia, North America and Africa. Haplotype network analysis indicated that the psyllids from Kenya were genetically close to an accession from Cambodia, and distinctly different to those from La Reunion. These findings revealed populations in southern Indochina would be the likely source of the D. citri introduction into East Africa through human-mediated transfer of psyllid-infested plants.
Published: 2021
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8. Effects of maturity level, steam treatment, or active packaging to maintain the quality of minimally processed mango ( Mangifera indica cv. José)

Author: Annalisa Apicella, Charlène Leneveu-Jenvrin, Paola Scarfato, Fabienne Remize, Marc Chillet, Loredana Incarnato, Kelly Bradley, Jean-Christophe Meile, Démarche intégrée pour l'obtention d'aliments de qualité (UMR QualiSud), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Avignon Université (AU)-Université de La Réunion (UR)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), University of Salerno (UNISA), Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS), Qualisud - Pôle de La Réunion (Qualisud Réunion ), Sciences Pour l'Oenologie (SPO), Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Region Reunion FEDER RE0002361, European Commission, Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Avignon Université (AU)-Université de La Réunion (UR)-Université de Montpellier (UM)-Institut Agro - Montpellier SupAgro, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Avignon Université (AU)-Université de La Réunion (UR)-Université de Montpellier (UM)-Institut Agro - Montpellier SupAgro, and Université de Montpellier (UM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro - Montpellier SupAgro
Subjects: 2. Zero hunger, 0106 biological sciences, mango fruit, active packaging, shelf life, General Chemical Engineering, media_common.quotation_subject, Active packaging, food and beverages, 04 agricultural and veterinary sciences, General Chemistry, Biology, 040401 food science, 01 natural sciences, Maturity (finance), Horticulture, 0404 agricultural biotechnology, 010608 biotechnology, Mangifera, Quality (business), [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition, Food Science, media_common
Abstract: International audience; The shelf-life of minimally processed Jose mango is primarily limited by browning during refrigerated storage. Three approaches were assayed to increase product shelf-life. Processing fruit sampled at an earlier ripening stage reduced browning during storage but fruit remained acidic. Steam treatment at 60 degrees C for 3 min reduced polyphenol oxidase activity by 72%, and microbial population remained below 2.5 log CFU/g after 10 days of storage. However, the visual aspect of steam-treated mango pieces turned to dully green. Lastly, different multilayer film configurations containing an oxygen scavenger were tested. Two films, having a thickness of the active layer of 40 mu m, limited color change by 32%-36% and hardness decrease of mango cuts after 7 days of storage at 4 degrees C. Both active and passive layers of films contribute to maintain fruit quality. The use of active packaging was promising but requires further examination and possibly combination with other physical or chemical treatments.Novelty impact statement A short steam treatment partly inactivates PPO and increases microbiological quality but failed to maintain fruit color during storage. On the opposite, active packaging with oxygen scavenger limits browning and hardness loss during storage. Active and passive layers of films both play a role in maintaining fruit quality.
Published: 2021
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9. Contribution of historical herbarium small RNAs to the reconstruction of a cassava mosaic geminivirus evolutionary history

Author: Adrien, Rieux, Paola, Campos, Arnaud, Duvermy, Sarah, Scussel, Darren, Martin, Myriam, Gaudeul, Pierre, Lefeuvre, Nathalie, Becker, Jean-Michel, Lett, Peuplements végétaux et bioagresseurs en milieu tropical (UMR PVBMT), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Université de La Réunion (UR)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Département Systèmes Biologiques (Cirad-BIOS), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Institut de Systématique, Evolution, Biodiversité (ISYEB ), Muséum national d'Histoire naturelle (MNHN)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Computational Biology Group, Dept Clinical Laboratory Sciences, University of Cape Town, Institute of Infectious Diseases and Molecular Medicine (IIDMM), This work was financially supported by l'Agence Nationale pour la Recherche (JCJC MUSEOBACT contrat ANR 17-CE35-0009), the European Regional Development Fund (ERDF contract GURDT I2016-1731-0006632), Region Reunion, the French Agropolis Foundation (Labex Agro-Montpellier, E-SPACE Project Number 1504004, MUSEOVIR project number 1600-004), the SYNTHESYS Project http://www.synthesys.info/(Grants GBTAF-6437 and GB-TAF-7130) which is financed by European Community Research Infrastructure Action under the FP7 'Capacities' Program & CIRAD/AI-CRESI-3/2016. PhD of P.C. was co-funded by ED 227, Museum national d'Histoire naturelle et Sorbonne Universite, French Ministry of Higher Education, Research and Innovation, France., ANR-17-CE35-0009,MUSEOBACT,'Une nuit au musée': mieux reconstuire les emergences de bactéries pathogènes des cultures grâce à des échantillons historiques(2017), ANR-10-LABX-0001,AGRO,Agricultural Sciences for sustainable Development(2010), Institut méditerranéen de biodiversité et d'écologie marine et continentale (IMBE), Centre National de la Recherche Scientifique (CNRS)-Institut de recherche pour le développement [IRD] : UMR237-Aix Marseille Université (AMU)-Avignon Université (AU), and Muséum national d'Histoire naturelle (MNHN)-École pratique des hautes études (EPHE)
Subjects: Manihot, Science, High-Throughput Nucleotide Sequencing, Bayes Theorem, Genome, Viral, Genomics, Sequence Analysis, DNA, [SDV.BID]Life Sciences [q-bio]/Biodiversity, Article, Computational biology and bioinformatics, Evolution, Molecular, RNA, Plant, Begomovirus, Host-Pathogen Interactions, Medicine, Molecular ecology, Phylogeny, Plant Diseases
Abstract: International audience; Emerging viral diseases of plants are recognised as a growing threat to global food security. However, little is known about the evolutionary processes and ecological factors underlying the emergence and success of viruses that have caused past epidemics. With technological advances in the field of ancient genomics, it is now possible to sequence historical genomes to provide a better understanding of viral plant disease emergence and pathogen evolutionary history. In this context, herbarium specimens represent a valuable source of dated and preserved material. We report here the first historical genome of a crop pathogen DNA virus, a 90-year-old African cassava mosaic virus (ACMV), reconstructed from small RNA sequences bearing hallmarks of small interfering RNAs. Relative to tip-calibrated dating inferences using only modern data, those performed with the historical genome yielded both molecular evolution rate estimates that were significantly lower, and lineage divergence times that were significantly older. Crucially, divergence times estimated without the historical genome appeared in discordance with both historical disease reports and the existence of the historical genome itself. In conclusion, our study reports an updated time-frame for the history and evolution of ACMV and illustrates how the study of crop viral diseases could benefit from natural history collections.
Published: 2021
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10. Water temperature influences larval survival of the amphidromous goby Sicyopterus lagocephalus

Author: Dominique Ponton, Nicolas Occelli, Philippe Gaudin, Nils Teichert, Raphaël Lagarde, Biologie des Organismes et Ecosystèmes Aquatiques (BOREA), Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU), Muséum national d'Histoire naturelle (MNHN), Hydrô Réunion, Centre de Formation et de Recherche sur les Environnements Méditérranéens (CEFREM), Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS), SPE Université de Corse Pasquale Paoli, Sciences pour l'environnement (SPE), Centre National de la Recherche Scientifique (CNRS)-Université Pascal Paoli (UPP)-Centre National de la Recherche Scientifique (CNRS)-Université Pascal Paoli (UPP), Ecologie marine tropicale des océans Pacifique et Indien (ENTROPIE [Nouvelle-Calédonie]), Ifremer - Nouvelle-Calédonie, Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut de Recherche pour le Développement (IRD [Nouvelle-Calédonie])-Université de la Nouvelle-Calédonie (UNC), Institut Halieutique et des Sciences Marines, Université de Toliara, Ecologie Comportementale et Biologie des Populations de Poissons (ECOBIOP), Université de Pau et des Pays de l'Adour (UPPA)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), European Commission, Region Reunion, Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université des Antilles (UA), Université de Perpignan Via Domitia (UPVD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Université Pascal Paoli (UPP)-Centre National de la Recherche Scientifique (CNRS)-Université Pascal Paoli (UPP)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD [Nouvelle-Calédonie])-Ifremer - Nouvelle-Calédonie, and Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de la Nouvelle-Calédonie (UNC)
Subjects: 0106 biological sciences, media_common.quotation_subject, [SDE.MCG]Environmental Sciences/Global Changes, Aquatic Science, 010603 evolutionary biology, 01 natural sciences, Predation, amphidromy, mixed feeding period, 14. Life underwater, Ecology, Evolution, Behavior and Systematics, early life history, larval survival, media_common, Larva, Ecology, biology, 010604 marine biology & hydrobiology, fungi, Goby, starvation, Sicyopterus lagocephalus, biology.organism_classification, 6. Clean water, Salinity, 13. Climate action, Seawater, Sicydiinae, Reproduction, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, water warming
Abstract: Water warming induced by human activities can impact fish larvae survival, notably because it influences larval development and prey abundances. Amphidromous gobies of the subfamily Sicydiinae are particularly sensitive to this threat as the newly hatched free embryos are poorly developed and the first feeding opportunity only occurs after they reach the ocean. Here, we studied how water temperature (21, 23, 25, 29 and 31 degrees C) impacts early development stages of Sicyopterus lagocephalus in both freshwater and marine aquaria (salinity 35). We monitored survival time, larval condition and the occurrence of critical developmental events such as mouth opening, yolk sac and oil globule resorption. In freshwater, the survival exceeded 150 hours at 21 degrees C, while it dropped below 50 hours at 31 degrees C. In seawater, the larval development of unfed larvae was significantly affected by temperature, survival time being greatly reduced in warmer waters. Accounting for the observed duration between mouth opening and the resorption of the oil globule, we estimated that larvae need to find suitable prey in seawater within a short time: around 30 hours during the peak of reproduction in summer. Otherwise, their endogenous reserves become depleted and their condition degrades. This study emphasises the sensitivity of free embryos to stream flow alterations, which contributes to the increase in water temperature and to the slowing down of larvae drift to the ocean. We conclude that once in seawater the temperature and feeding conditions experienced by amphidromous larvae are critical for survival.
Published: 2021
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11. Maintaining Physicochemical, Microbiological, and Sensory Quality of Pineapple Juice (Ananas comosus, Var. ‘Queen Victoria’) through Mild Heat Treatment

Author: Leneveu-Jenvrin, Charlène, Quentin, Baptiste, Assemat, Sophie, Remize, Fabienne, Qualisud - Pôle de La Réunion (Qualisud Réunion), Démarche intégrée pour l'obtention d'aliments de qualité (UMR Qualisud), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Avignon Université (AU)-Université de La Réunion (UR)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Avignon Université (AU)-Université de La Réunion (UR)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Département Performances des systèmes de production et de transformation tropicaux (Cirad-PERSYST), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), and This research was funded by European Union and Region Reunion (FEDER), grant number GURDTI-2017-0391-0002361.
Subjects: lcsh:Chemistry, beverage, lcsh:QD1-999, variability, seasonal variations, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, lcsh:TP1-1185, fruit, lcsh:Chemical technology
Abstract: Shelf life of freshly prepared pineapple juice is short and requires refrigerated conditions of storage. Mild heat treatment remains the easiest way to prolong juice shelf life for small companies. This study was constructed to assess pineapple cv. Queen Victoria juice shelf life from a broad examination of its quality and to propose the most appropriate thermal treatment to increase shelf life without any perceptible decrease in quality. From 25 independent batches of pineapple, collected in different areas and seasons from Reunion Island, the variability of juice physicochemical and microbiological quality was determined. Juice pH values were the highest for fruit harvested in summer, but the juice acidity remained low enough to prevent pathogen spore-forming bacteria growth. During storage at 4 &deg, C, color was modified, and yeasts and molds were the main microbial group exhibiting growth. Assessment of sensory quality resulted in the proposal of a shelf life comprising between three and seven days. Compared to higher temperatures, heat treatment at 60 &deg, C was enough to ensure a good microbiological quality for 30 days, but sensory characteristics and color changes led to the proposal of a shelf life of seven days for pineapple juice treated at 60 &deg, C.
Published: 2020
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12. Identification of flux checkpoints in a metabolic pathway through white-box, grey-box and black-box modeling approaches

Author: Lo-Thong, Ophélie, Charton, Philippe, Cadet, Xavier F., Grondin-Perez, Brigitte, Saavedra, Emma, Damour, Cédric, Cadet, Frédéric, Biologie Intégrée du Globule Rouge (BIGR (UMR_S_1134 / U1134)), Institut National de la Transfusion Sanguine [Paris] (INTS)-Université de La Réunion (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Pointe-à-Pitre/Abymes [Guadeloupe] -Université des Antilles (UA)-Université de Paris (UP), Dynamique des Structures et Interactions des Macromolécules Biologiques - Pôle de La Réunion (DSIMB Réunion), Institut National de la Transfusion Sanguine [Paris] (INTS)-Université de La Réunion (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Pointe-à-Pitre/Abymes [Guadeloupe] -Université des Antilles (UA)-Université de Paris (UP)-Institut National de la Transfusion Sanguine [Paris] (INTS)-Université de La Réunion (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Pointe-à-Pitre/Abymes [Guadeloupe] -Université des Antilles (UA)-Université de Paris (UP), Artificial Intelligence Department [Paris], Protein Engineering Accelerator [Paris] (PEACCEL), Laboratoire d'Energétique, d'Electronique et Procédés (LE2P), Université de La Réunion (UR), Instituto Nacional de Cardiología Ignacio Chávez [Mexico, Mexique], OLT is supported by a PhD grant from the Region Reunion and European Union (FEDER) under European Operational Program FEDER REUNION –2014/2020 file number 20171389, tiers 216275., Institut National de la Transfusion Sanguine [Paris] (INTS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Université des Antilles (UA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de la Transfusion Sanguine [Paris] (INTS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Université des Antilles (UA)-Institut National de la Santé et de la Recherche Médicale (INSERM), Bodescot, Myriam, Institut National de la Transfusion Sanguine [Paris] (INTS)-Université de La Réunion (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Pointe-à-Pitre/Abymes [Guadeloupe] -Université des Antilles (UA)-Université Paris Cité (UPCité), Institut National de la Transfusion Sanguine [Paris] (INTS)-Université de La Réunion (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Pointe-à-Pitre/Abymes [Guadeloupe] -Université des Antilles (UA)-Université Paris Cité (UPCité)-Institut National de la Transfusion Sanguine [Paris] (INTS)-Université de La Réunion (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Pointe-à-Pitre/Abymes [Guadeloupe] -Université des Antilles (UA)-Université Paris Cité (UPCité), and Energy Lab (ENERGY Lab)
Subjects: Science, Entamoeba histolytica, [SCCO.COMP]Cognitive science/Computer science, Models, Theoretical, Models, Biological, Article, Physical Phenomena, Kinetics, [SCCO.COMP] Cognitive science/Computer science, [SDV.SP.PHARMA] Life Sciences [q-bio]/Pharmaceutical sciences/Pharmacology, Machine learning, [SDV.SP.PHARMA]Life Sciences [q-bio]/Pharmaceutical sciences/Pharmacology, Medicine, Computational models, Computer Simulation, [SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology, [SDV.MP.PAR]Life Sciences [q-bio]/Microbiology and Parasitology/Parasitology, Glycolysis, Metabolic Networks and Pathways, [SDV.MP.PAR] Life Sciences [q-bio]/Microbiology and Parasitology/Parasitology, ComputingMilieux_MISCELLANEOUS
Abstract: International audience; Metabolic pathway modeling plays an increasing role in drug design by allowing better understanding of the underlying regulation and controlling networks in the metabolism of living organisms. However, despite rapid progress in this area, pathway modeling can become a real nightmare for researchers, notably when few experimental data are available or when the pathway is highly complex. Here, three different approaches were developed to model the second part of glycolysis of E. histolytica as an application example, and have succeeded in predicting the final pathway flux: one including detailed kinetic information (white-box), another with an added adjustment term (grey-box) and the last one using an artificial neural network method (black-box). Afterwards, each model was used for metabolic control analysis and flux control coefficient determination. The first two enzymes of this pathway are identified as the key enzymes playing a role in flux control. This study revealed the significance of the three methods for building suitable models adjusted to the available data in the field of metabolic pathway modeling, and could be useful to biologists and modelers.
Published: 2020
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13. Role of biological control agents and physical treatments in maintaining the quality of fresh and minimally-processed fruit and vegetables

Author: Florence Charles, Francisco J. Barba, Fabienne Remize, Charlène Leneveu-Jenvrin, Qualisud - Pôle de La Réunion (Qualisud Réunion), Démarche intégrée pour l'obtention d'aliments de qualité (UMR Qualisud), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de La Réunion (UR)-Université de Montpellier (UM)-Avignon Université (AU)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université Montpellier 2 - Sciences et Techniques (UM2)-Université Montpellier 1 (UM1)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de La Réunion (UR)-Université de Montpellier (UM)-Avignon Université (AU)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Université Montpellier 2 - Sciences et Techniques (UM2)-Université Montpellier 1 (UM1), Universitat de València (UV), and This work was supported by European Union and Region Reunion (FEDER).
Subjects: 030309 nutrition & dietetics, media_common.quotation_subject, [SDV]Life Sciences [q-bio], Biological pest control, Health benefits, Biology, Industrial and Manufacturing Engineering, 03 medical and health sciences, 0404 agricultural biotechnology, Food distribution, Food Preservation, Evaluation methods, Vegetables, microbiota, Humans, Quality (business), media_common, 2. Zero hunger, 0303 health sciences, business.industry, fresh-cut, food and beverages, Biocontrol, 04 agricultural and veterinary sciences, General Medicine, Biopreservation, 040401 food science, Biotechnology, Biological Control Agents, Food products, Fruit, Postharvest, post-harvest decay, business, competition, Food Science, biopreservation
Abstract: International audience; Fruit and vegetables are an important part of human diets and provide multiple health benefits. However, due to the short shelf-life of fresh and minimally-processed fruit and vegetables, significant losses occur throughout the food distribution chain. Shelf-life extension requires preserving both the quality and safety of food products. The quality of fruit and vegetables, either fresh or fresh-cut, depends on many factors and can be determined by analytical or sensory evaluation methods. Among the various technologies used to maintain the quality and increase shelf-life of fresh and minimally-processed fruit and vegetables, biological control is a promising approach. Biological control refers to postharvest control of pathogens using microbial cultures. With respect to application of biological control for increasing the shelf-life of food, the term biopreservation is favored, although the approach is identical. The methods for screening and development of biocontrol agents differ greatly according to their intended application, but the efficacy of all current approaches following scale-up to commercial conditions is recognized as insufficient. The combination of biological and physical methods to maintain quality has the potential to overcome the limitations of current approaches. This review compares biocontrol and biopreservation approaches, alone and in combination with physical methods. The recent increase in the use of meta-omics approaches and other innovative technologies, has led to the emergence of new strategies to increase the shelf-life of fruit and vegetables, which are also discussed herein.
Published: 2019
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14. Flux prediction using artificial neural network (ANN) for the upper part of glycolysis

Author: Ajjolli Nagaraja, Anamya, Fontaine, Nicolas, Delsaut, Mathieu, Charton, Philippe, Damour, Cedric, Offmann, Bernard, Grondin-Perez, Brigitte, Cadet, Frederic, Laboratoire d'Energétique, d'Electronique et Procédés (LE2P), Université de La Réunion (UR), Protein Engineering Accelerator [Paris] (PEACCEL), Biologie Intégrée du Globule Rouge (BIGR (UMR_S_1134 / U1134)), Institut National de la Transfusion Sanguine [Paris] (INTS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université des Antilles (UA), Unité de fonctionnalité et ingénierie de protéines (UFIP), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS), AAN is supported by a PhD grant from Region Reunion and European Union (FEDER) under European operational program INTERRG V-2014-2020 file number 20161449, tiers 234273., Bodescot, Myriam, Energy Lab (ENERGY Lab), Dynamique des Structures et Interactions des Macromolécules Biologiques - Pôle de La Réunion (DSIMB Réunion), Institut National de la Transfusion Sanguine [Paris] (INTS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Université des Antilles (UA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de la Transfusion Sanguine [Paris] (INTS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Université des Antilles (UA)-Institut National de la Santé et de la Recherche Médicale (INSERM), Laboratoire de Biochimie et Génétique Moléculaire (LBGM), and Institut National de la Transfusion Sanguine [Paris] (INTS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Pointe-à-Pitre/Abymes [Guadeloupe] -Université des Antilles (UA)-Institut National de la Transfusion Sanguine [Paris] (INTS)-Université Paris Diderot - Paris 7 (UPD7)-Université de La Réunion (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Pointe-à-Pitre/Abymes [Guadeloupe] -Université des Antilles (UA)
Subjects: Metabolic Processes, Computer and Information Sciences, Neural Networks, Science, Research and Analysis Methods, Biochemistry, Drug Metabolism, Artificial Intelligence, Medicine and Health Sciences, [SDV.BBM] Life Sciences [q-bio]/Biochemistry, Molecular Biology, Pharmacokinetics, [SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology, Molecular Biology Techniques, Molecular Biology, ComputingMilieux_MISCELLANEOUS, Artificial Neural Networks, Computational Neuroscience, Pharmacology, Applied Mathematics, Simulation and Modeling, Biology and Life Sciences, Computational Biology, Proteins, NAD, Metabolic Flux Analysis, [SDV.BBM.BC]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Biomolecules [q-bio.BM], Enzymes, Metabolism, Cell Labeling, Physical Sciences, Enzymology, Medicine, Metabolic Pathways, Metabolic Labeling, Neural Networks, Computer, Glycolysis, Mathematics, Algorithms, Metabolic Networks and Pathways, Research Article, Neuroscience
Abstract: International audience; The selection of optimal enzyme concentration in multienzyme cascade reactions for the highest product yield in practice is very expensive and time-consuming process. The modelling of biological pathways is a difficult process because of the complexity of the system. The mathematical modelling of the system using an analytical approach depends on the many parameters of enzymes which rely on tedious and expensive experiments. The artificial neural network (ANN) method has been successively applied in different fields of science to perform complex functions. In this study, ANN models were trained to predict the flux for the upper part of glycolysis as inferred by NADH consumption, using four enzyme concentrations i.e., phosphoglucoisomerase, phosphofructokinase, fructose-bisphosphate-aldolase, triose-phosphate-isomerase. Out of three ANN algorithms, the neuralnet package with two activation functions, "logistic" and "tanh" were implemented. The prediction of the flux was very efficient: RMSE and R2 were 0.847, 0.93 and 0.804, 0.94 respectively for logistic and tanh functions using a cross validation procedure. This study showed that a systemic approach such as ANN could be used for accurate prediction of the flux through the metabolic pathway. This could help to save a lot of time and costs, particularly from an industrial perspective. The R-code is available at: https://github.com/DSIMB/ANN-Glycolysis-Flux-Prediction.
Published: 2019
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15. Impact of host endosymbionts on parasitoid host range — from mechanisms to communities

Author: Enric Frago, Yannick Outreman, Nicolas Desneux, Lucie S. Monticelli, Institut Sophia Agrobiotech [Sophia Antipolis] (ISA), Institut National de la Recherche Agronomique (INRA)-Université Nice Sophia Antipolis (... - 2019) (UNS), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Institut de Génétique, Environnement et Protection des Plantes (IGEPP), Institut National de la Recherche Agronomique (INRA)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-AGROCAMPUS OUEST, Peuplements végétaux et bioagresseurs en milieu tropical (UMR PVBMT), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Université de La Réunion (UR), European Commission, Centre de Coopération Internationale en Recherche Agronomique pour le Développement, 611810, Marie-Curie F7-IRSES Action, Regional Council of Reunion, the Departmental Council of the Region Reunion, European Project: 611810,EC:FP7:PEOPLE,FP7-PEOPLE-2013-IRSES,APHIWEB(2014), Institut Sophia Agrobiotech (ISA), Institut National de la Recherche Agronomique (INRA)-Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS), Institut National de la Recherche Agronomique (INRA)-Université de Rennes (UR)-AGROCAMPUS OUEST, AGROCAMPUS OUEST-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Recherche Agronomique (INRA), Institut de Recherche pour le Développement (IRD)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Université de La Réunion (UR)-Institut National de la Recherche Agronomique (INRA), Centre National de la Recherche Scientifique (CNRS)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut National de la Recherche Agronomique (INRA), and Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)
Subjects: 0106 biological sciences, 0301 basic medicine, Insecta, [SDV]Life Sciences [q-bio], Biological pest control, 01 natural sciences, Parasitoid, specialization, Natural enemies, ComputingMilieux_MISCELLANEOUS, symbionts, media_common, Larva, Appetitive Behavior, Ecology, ervi, Parasitoïde, protection, L20 - Écologie animale, L72 - Organismes nuisibles des animaux, Ecology (disciplines), media_common.quotation_subject, Biology, Bacterial Physiological Phenomena, 010603 evolutionary biology, Competition (biology), diversity, host range [EN], resistance, 03 medical and health sciences, [SDV.SA.STA]Life Sciences [q-bio]/Agricultural sciences/Sciences and technics of agriculture, evolution, Animals, Symbiosis, Ecology, Evolution, Behavior and Systematics, Bacteria, Host (biology), facultative endosymbionts, fungi, pea aphid, biochemical phenomena, metabolism, and nutrition, biology.organism_classification, infection, 030104 developmental biology, Insect Science, Evolutionary ecology, Écologie animale, [SDV.EE.IEO]Life Sciences [q-bio]/Ecology, environment/Symbiosis
Abstract: International audience; In insects, bacterial endosymbionts are known to influence the ecology of their hosts by modifying interactions with natural enemies such as parasitoids. Symbionts can modulate both parasitoid behavioral and/or physiological traits as well as host behaviors and life-history traits. Together these suggest that endosymbionts may impact the host range of parasitoids. For example, endosymbionts may narrow parasitoid host range through first, reducing parasitoid ability to locate hosts and/or larval survival, second, affecting fitness traits of the emerging adult parasitoid and/or third, modulating the outcome of interference and exploitative competition between parasitoid species. From both a fundamental and applied point of view, these symbiotic effects would influence the ecology and evolution of parasitoids and associated population-level processes and ecosystem services (e.g. biocontrol).
Published: 2019
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16. Breeding pattern and nest guarding in Sicyopterus lagocephalus, a widespread amphidromous Gobiidae

Author: Philippe Gaudin, Nils Teichert, Marine Richarson, M. Metzger, P. Keith, Pierre Valade, Ecologie Comportementale et Biologie des Populations de Poissons (ECOBIOP), Institut National de la Recherche Agronomique (INRA)-Université de Pau et des Pays de l'Adour (UPPA), Association Réunionnaise pour le Développement de l'Aquaculture, Muséum national d'Histoire naturelle (MNHN), Centre Régional d'Application Aquacole, Organisme Consultant en Environnement Aquatique, Fédération Départementale de Pêche et de Protection du Milieu Aquatique de la Réunion, Partenaires INRAE, and The present study was conducted with the financial support of Electricite ́De France (22-30 avenue de Wagram, 75382 Paris Cedex 8), Office de l’Eau Reunion (49 rue Mazagran, 97 400 Saint Denis), Region Reunion (Avenue Rene ́Cassin, BP 7190, 97719 Saint Denis cedex 9), Parc National de La Reunion (112 rue Sainte Marie, 97400 St Denis) and the European Union (European Social Fund)
Subjects: biology, Hatching, Ecology, [SDV.BA]Life Sciences [q-bio]/Animal biology, Goby, Zoology, nest size, Sicyopterus lagocephalus, biology.organism_classification, Nest, Animal ecology, Sexual selection, mating system, sexual selection, Animal Science and Zoology, Reproductive value, nest guarding, Parental investment, Ecology, Evolution, Behavior and Systematics, nest choice
Abstract: Amphidromous gobies are usually nest spawners. Females lay a large number of small eggs under stones or onto plant stems, leaves or roots while males take care of the clutch until hatching. This study investigates the breeding pattern and paternal investment of Sicyopterus lagocephalus in a stream on Reunion Island. In February 2007 and January 2010, a total of 170 nests were found and the presence of a goby was recorded at 61 of them. The number of eggs in the nests ranged from 5,424 to 112,000 with an average number of 28,629. We showed that males accepted a single female spawning in the nest and cared for the eggs until hatching. The probability for a nest to be guarded increased with the number of eggs within it, suggesting that paternal investment depends on a trade-off between the reproductive value of the current reproduction and future nesting events. We showed that large nest stones were occupied by large males (TL >80 mm), whereas smaller males (TL
Published: 2013
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17. Working fluid selection general method and sensitivity analysis of an Organic Rankine Cycle (ORC): application to Ocean Thermal Energy Conversion (OTEC)

Author: Dijoux, Alexandre, Sinama, Frantz, Marc, Olivier, Clauzade, Bertrand, Castaing-Lasvignottes, Jean, Dijoux, Alexandre, Physique et Ingénierie Mathématique pour l'Énergie, l'environnemeNt et le bâtimenT (PIMENT), Université de La Réunion (UR), DCNS Group [Nantes] (DCNS-Nantes), DCNS group, and This work was supported by NAVAL Energies, the territorial authority Region Reunion and the laboratory of Physical and Mathematical Engineering for Energy and Environment in Reunion Island.
Subjects: [SDE.IE]Environmental Sciences/Environmental Engineering, [PHYS.MECA.THER] Physics [physics]/Mechanics [physics]/Thermics [physics.class-ph], [PHYS.MECA.THER]Physics [physics]/Mechanics [physics]/Thermics [physics.class-ph], Entropic Mean Temperature Difference (EMTD), Organic Rankine cycle (ORC), [SDE.IE] Environmental Sciences/Environmental Engineering, parametric sensitivity analysis, Ocean Thermal Energy Conversion (OTEC)
Abstract: A general model of an ORC (Organic Rankine Cycle) that is applicable to various technologies of heat exchangers has been carried out. It has been done considering the entropic mean temperature difference between the heat source and the working fluid as a parameter for heat exchangers. This model allows to compare pure fluids and mixtures in similar operating conditions. Simulations were conducted in the case of OTEC (Ocean Thermal Energy Conversion), for which the inputs are based on experimental measurements on an onshore prototype in Reunion Island. 26 fluids have been compared, considering thermodynamic performances (thermal efficiency and volumic work), technicity, security and environmental impacts. In the end, NH3, R507a and R1234yf appears to be the most suitable ones. In order to have a better understanding of the model and to determine its validity in the whole domain of variation of the parameters for OTEC, a parametric sensitivity analysis has been carried out by ANOVA (ANalysis Of VAriance) associated to polynomial chaos expansion method. The most sensible parameters are heat source temperature, heat exchangers entropic mean temperature difference and turbine isentropic efficiency. The ranking given for the fluids is still valid in the whole range of the parameters for OTEC.
Published: 2017

18. Fungal adaptation to contemporary fungicide applications: the case of Botrytis cinerea populations from Champagne vineyards (France)

Author: Florence Carpentier, Anne Sophie Walker, Elisabeth Fournier, Sajid Ali, Virginie Ravigné, Adrien Rieux, BIOlogie et GEstion des Risques en agriculture (BIOGER), Institut National de la Recherche Agronomique (INRA)-AgroParisTech, Biologie et Génétique des Interactions Plante-Parasite (UMR BGPI), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Peuplements végétaux et bioagresseurs en milieu tropical (UMR PVBMT), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Université de La Réunion (UR), Agricultural University Peshawar, Plant Health and Environment Department of the French National Research Institute for Agronomy (INRA), European Union Regional Development Fund (ERDF), Conseil Departemental de la Reunion, Region Reunion, French Agropolis Fondation (Labex Agro-Montpellier), French Agropolis Fondation (E-SPACE) : 1504-004, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), AgroParisTech-Institut National de la Recherche Agronomique (INRA), and Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)
Subjects: 0301 basic medicine, champagne, migration, resistance cost, maladie fongique, Effective population size, Gene Frequency, fungal diseases, Dynamique des populations, Vitis, Botrytis cinerea, Vegetal Biology, biology, Microbiology and Parasitology, Adaptation, Physiological, Microbiologie et Parasitologie, Fungicide, Horticulture, Phenotype, [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology, Botrytis, France, protection des cultures, botrytis cinerea, vignoble, ATP Binding Cassette Transporter, Subfamily B, Genotype, selection, vineyard, diversity, Fungal Proteins, fungicide resistance modelling, 03 medical and health sciences, Spatio-Temporal Analysis, Drug Resistance, Fungal, Botany, Genetics, [SDV.BV]Life Sciences [q-bio]/Vegetal Biology, ATP Binding Cassette Transporter, Subfamily B, Member 1, Adaptation, mécanisme de défense, Ecology, Evolution, Behavior and Systematics, Selection (genetic algorithm), H20 - Maladies des plantes, Local adaptation, Plant Diseases, Résistance aux pesticides, Resistance (ecology), Modélisation des cultures, fongicide, 15. Life on land, biology.organism_classification, maladie des plantes, Fungicides, Industrial, 030104 developmental biology, Genetic Loci, Vitis vinifera, Mutation, Species richness, Écologie microbienne, Biologie végétale
Abstract: BGPI : équipe 5; In addition to being one of the most acute problems impeding chemical control of fungal diseases, the evolution of fungicide resistance is an emblematic case of local adaptation to spatially heterogeneous and temporally variable selection pressures. Here we dissected the adaptation of Botrytis cinerea (the causal agent of grey mould) populations on grapes to several fungicides. We carried out a two-year survey (four collection dates) on three treated/untreated pairs of plots from vineyards in Champagne (France), and monitored the frequency of four resistant phenotypes that are unambiguously associated to four distinct genotypes. For two loci under selection by currently-used fungicides (MDR1 and MDR2), the frequencies of resistant mutations at vintage were greater in treated plots compared to untreated plots, showing that the effect of selection is detectable even at the plot scale. This effect was not detectable for two other loci under selection by previously-used fungicides (BenR1 and ImiR1). We also found that treatment with currently-used fungicides reduced B. cinerea effective population size, leading to a significant decrease in genic diversity and allelic richness in treated versus untreated plots. We further highlight that even under ample drift and migration, fungal populations can present an efficient response to selection. Finally, for the four studied loci, the costs of fungicide resistance were estimated by modelling the decrease in the frequency of resistant mutations in the absence of treatment. We discuss the importance of these estimates for defining strategies for limiting or counteracting the local adaptation of pests to fungicides. This article is protected by copyright. All rights reserved.
Published: 2017
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19. Occurrence of a novel mastrevirus in sugarcane germplasm collections in Florida, Guadeloupe and Reunion

Author: Emmanuel Fernandez, Arvind Varsani, Jack C. Comstock, Philippe Rott, Wardatou Boukari, Jane E. Polston, Philippe Roumagnac, Ricardo I. Alcalá-Briseño, Jean-Heinrich Daugrois, Simona Kraberger, Denis Filloux, Jean-Michel Lett, Darren P. Martin, Rott, Philippe C., IFAS, Everglades Research & Education Center, University of Florida [Gainesville] (UF), IFAS, Plant pathology Department, The Biodesign Center for Fundamental and Applied Microbiomics, Center for Evolution and Medicine, School of Life Sciences, Arizona State University [Tempe] (ASU), Biologie et Génétique des Interactions Plante-Parasite (UMR BGPI), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Institut National de la Recherche Agronomique (INRA), Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Sugarcane Field Station, USDA-ARS : Agricultural Research Service, Peuplements végétaux et bioagresseurs en milieu tropical (UMR PVBMT), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Université de La Réunion (UR), Computational Biology Group, Institute of Infectious Disease and Molecular Medicine, Faculty of Health Sciences, Observatory, University of Cape Town, Structural Biology Research Unit, Department of Clinical Laboratory Sciences, Florida Sugar Cane League : 00107475, F000057, USDA National Institute of Food and Agriculture : Hatch/Rott FLA-BGL-005404, Region Reunion, European Union (FEDER) : 1.03, National Research Foundation of South Africa, EU grant FP7-PEOPLE-IOF : PIOF-GA-2013-622571, University of Florida [Gainesville], Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut de Recherche pour le Développement (IRD)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Université de La Réunion (UR)-Institut National de la Recherche Agronomique (INRA), and Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)
Subjects: 0301 basic medicine, Germplasm, Identification, Virologie, Sequence Homology, Saccharum officinarum, sugarcane, Cluster Analysis, Cloning, Molecular, Guadeloupe, pathologie végétale, Phylogeny, Phylogenetic tree, biology, Microbiology and Parasitology, Microbiologie et Parasitologie, Saccharum, Infectious Diseases, Geminiviridae, [SDV.MP]Life Sciences [q-bio]/Microbiology and Parasitology, [SDV.MP.VIR]Life Sciences [q-bio]/Microbiology and Parasitology/Virology, Florida, virologie végétale, Saccharum spp, Sugarcane striate virus, génomique, lcsh:Infectious and parasitic diseases, 03 medical and health sciences, Mastrevirus, Phylogenetics, Virology, Botany, lcsh:RC109-216, Virus classification, H20 - Maladies des plantes, Génome, Whole Genome Sequencing, Host (biology), Research, pays tropical, Sequence Analysis, DNA, Virus des végétaux, Taxonomie, biology.organism_classification, mastrevirus, 030104 developmental biology, DNA, Viral, Sugarcane, Reunion, canne à sucre
Abstract: Background In Africa and Asia, sugarcane is the host of at least seven different virus species in the genus Mastrevirus of the family Geminiviridae. However, with the exception of Sugarcane white streak virus in Barbados, no other sugarcane-infecting mastrevirus has been reported in the New World. Conservation and exchange of sugarcane germplasm using stalk cuttings facilitates the spread of sugarcane-infecting viruses. Methods A virion-associated nucleic acids (VANA)-based metagenomics approach was used to detect mastrevirus sequences in 717 sugarcane samples from Florida (USA), Guadeloupe (French West Indies), and Réunion (Mascarene Islands). Contig assembly was performed using CAP3 and sequence searches using BLASTn and BLASTx. Mastrevirus full genomes were enriched from total DNA by rolling circle amplification, cloned and sequenced. Nucleotide and amino acid sequence identities were determined using SDT v1.2. Phylogenetic analyses were conducted using MEGA6 and PHYML3. Results We identified a new sugarcane-infecting mastrevirus in six plants sampled from germplasm collections in Florida and Guadeloupe. Full genome sequences were determined and analyzed for three virus isolates from Florida, and three from Guadeloupe. These six genomes share >88% genome-wide pairwise identity with one another and between 89 and 97% identity with a recently identified mastrevirus (KR150789) from a sugarcane plant sampled in China. Sequences similar to these were also identified in sugarcane plants in Réunion. Conclusions As these virus isolates share
Published: 2017
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20. A review of fault tolerant control strategies applied to proton exchange membrane fuel cell systems

Author: Michel Benne, Etienne Dijoux, Brigitte Grondin Perez, Nadia Yousfi Steiner, Marie-Cécile Péra, Laboratoire d'Energétique, d'Electronique et Procédés (LE2P), Université de La Réunion (UR), Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), La Fédération de Recherche CNRS (FCLAB (FR CNRS 3539)), This project is supported by the Region Bourgogne Franche-Comte, the Region Reunion, and the Labex ACTION program, and ANR-11-LABX-0001,ACTION,Systèmes intelligents intégrés au cœur de la matière(2011)
Subjects: Diagnosis tools, Engineering, Energy Engineering and Power Technology, Proton exchange membrane fuel cell, 02 engineering and technology, Fault (power engineering), 7. Clean energy, [SPI.AUTO]Engineering Sciences [physics]/Automatic, Degradation, 0502 economics and business, [PHYS.MECA.MEFL]Physics [physics]/Mechanics [physics]/Fluid mechanics [physics.class-ph], Isolation (database systems), 050207 economics, Electrical and Electronic Engineering, Physical and Theoretical Chemistry, Operating point, Renewable Energy, Sustainability and the Environment, business.industry, 05 social sciences, [SPI.NRJ]Engineering Sciences [physics]/Electric power, Modeling, Fault tolerance, Control engineering, 021001 nanoscience & nanotechnology, Optimal control, Identification (information), Electricity generation, Fault tolerant control, [PHYS.MECA.THER]Physics [physics]/Mechanics [physics]/Thermics [physics.class-ph], PEMFC, 0210 nano-technology, business
Abstract: International audience; Fuel cells are powerful systems for power generation. They have a good efficiency and do not generate greenhouse gases. This technology involves a lot of scientific fields, which leads to the appearance of strongly inter dependent parameters. This makes the system particularly hard to control and increases fault's occurrence frequency. These two issues call for the necessity to maintain the system performance at the expected level, even in faulty operating conditions. It is called " fault tolerant control " (FTC). The present paper aims to give the state of the art of FTC applied to the proton exchange membrane fuel cell (PEMFC). The FTC approach is composed of two parts. First, a diagnosis part allows the identification and the isolation of a fault; it requires a good a priori knowledge of all the possible faults. Then, a control part allows an optimal control strategy to find the best operating point to recover/ mitigate the fault; it re quires the knowledge of the degradation phenomena and their mitigation strategies.
Published: 2017
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21. Life-history traits of Encarsia guadeloupae, a natural enemy of the invasive spiralling whitefly Aleurodicus dispersus

Author: Pierre François Duyck, Nicolas Borowiec, Serge Glenac, Grégory Mollot, Serge Quilici, Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Université Paul-Valéry - Montpellier 3 (UPVM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut de Recherche pour le Développement (IRD [France-Sud]), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Institut Sophia Agrobiotech (ISA), Centre National de la Recherche Scientifique (CNRS)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut National de la Recherche Agronomique (INRA), CIRAD, Enlargement and sustainability of the Plant Protection Network (ePRPV) project, European Union, French government, Region Reunion, and Conseil General de La Reunion
Subjects: 0106 biological sciences, Encarsia, La Reunion, [SDV]Life Sciences [q-bio], Parasitism, Hôte alternatif, Whitefly, Hymenoptera, 010603 evolutionary biology, 01 natural sciences, survival, parasitism rate, Parasitoid, Aphelinidae, 14. Life underwater, Aleurodicus dispersus, alternative host, biology, Ecology, Parasitoïde, classical biological control, biology.organism_classification, H10 - Ravageurs des plantes, Lutte biologique, 010602 entomology, Insect Science, hymenopteran parasitoid, [SDE]Environmental Sciences, Instar, Agronomy and Crop Science
Abstract: International audience; On south-west Indian Ocean islands, many crops and ornamental plants are threatened by the spiralling whitefly Aleurodicus dispersus (Hemiptera: Aleyrodidae), which is a polyphagous pest that is native to the Caribbean region. Aleurodicus dispersus causes economic damage to various crops on all the islands in the south-west Indian Ocean. The hymenopteran parasitoid Encarsia guadeloupae (Hymenoptera: Aphelinidae) is a natural enemy of A.dispersus on the Caribbean islands. In this study, we assessed the geographical distribution of the parasitoid in La Reunion, an island in the south-west Indian Ocean where the parasitoid was first observed in 2004. We also investigated its main life-history traits. Field surveys indicated that the parasitoid is widespread in most of the low-lying areas of the island and exhibits high parasitism rates on A.dispersus populations. At 25 degrees C, E.guadeloupae adults had a mean longevity of 33.6days, and its pre-imaginal development required 23days. The lower temperature threshold and thermal constant were estimated to be 7.9 degrees C and 132 degree-days, respectively. Females of E.guadeloupae preferred to deposit eggs in early rather than in late instars of A.dispersus, and oviposition rates were highest in the second larval instar. Females of E.guadeloupae were able to oviposit in larvae of other species of whiteflies found in La Reunion (Bemisia tabaci and Dialeurolonga simplex), although subsequent development of the parasitoid was not monitored. Finally, we discuss the potential use of E.guadeloupae for the control of whitefly populations on islands in the south-west Indian Ocean.
Published: 2016
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22. Physiological and biochemical characteristics of the ethyl tiglate production pathway in the yeast Saprochaete suaveolens

Author: Grondin, Eric, Shum Cheong Sing, Alain, Caro, Yanis, Billerbeck, Gustavo M., François, Jean M., Petit, Thomas, Laboratoire de Chimie des Substances Naturelles et des Sciences des Aliments (LCSNSA), Université de La Réunion (UR), Laboratoire d'Ingénierie des Systèmes Biologiques et des Procédés (LISBP), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de la Recherche Agronomique (INRA), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Institut National Polytechnique (Toulouse) (Toulouse INP), Institut National de la Recherche Agronomique (INRA), Institut National de la Recherche Agronomique (INRA)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), The Region Reunion and Europe, Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), and Université de Toulouse (UT)
Subjects: β oxidation, saprochaete suaveolens, Saccharomyces cerevisiae, Biosynthetic Pathways, Flavoring Agents, Hemiterpenes, ehrlich pathway, esters, ascomycetes, Crotonates, flavours and fragrances, [CHIM]Chemical Sciences, Acyl Coenzyme A, Isoleucine
Abstract: International audience; A yeast identified as Saprochaete suaveolens was investigated for its capacity to produce a large panel of flavouring molecules. With a production of 32 compounds including 28 esters, S. suaveolens seems to be a good producer of fruity flavours and fragrances and especially of unsaturated esters, such as ethyl tiglate. Physiological and biochemical analyses were performed in this study in an attempt to comprehend the metabolic route to the formation of this compound. We show that the accumulation of ethyl tiglate by S. suaveolens is specifically induced by isoleucine. However, and contrary to S. cerevisiae, which harbours a classical Ehrlich pathway leading to the production of 2-methylbutanol from isoleucine, our results provide phenotypic and enzymological evidence of ethyl tiglate biosynthesis in S. suaveolens through the catabolism of this amino acid by the β-oxidation pathway, which generates tiglyl-CoA as a probable intermediate. A kinetic analysis of this flavour molecule during growth of S. suaveolens on glucose and isoleucine showed a phase of production of ethyl tiglate that culminated concurrently with isoleucine exhaustion, followed by a disappearance of this compound, likely due to reassimilation by the yeast. Copyright © 2014 John Wiley & Sons, Ltd.
Published: 2015
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23. A comparative study on the potential of epiphytic yeasts isolated from tropical fruits to produce flavoring compounds

Author: Alain Shum Cheong Sing, Yanis Caro, Eric Grondin, Thomas Petit, Carmen Nueno-Palop, Jean Marie François, Ando Lalaniaina Randrianierenana, Marson Raherimandimby, Steve James, Laboratoire de Chimie des Substances Naturelles et des Sciences des Aliments (LCSNSA), Université de La Réunion (UR), Université d'Antananarivo, Institute of Food Research [Norwich], Laboratoire d'Ingénierie des Systèmes Biologiques et des Procédés (LISBP), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National de la Recherche Agronomique (INRA), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Institut National Polytechnique (Toulouse) (Toulouse INP), Institut National de la Recherche Agronomique (INRA), Institut National de la Recherche Agronomique (INRA)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Region Reunion and Europe, Biotechnology and Biological Sciences Research Council (BBSRC), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), and Université de Toulouse (UT)
Subjects: Sequence analysis, principal component analysis, Microorganism, Biology, yeast, flavors, Microbiology, DNA, Ribosomal, Rhodotorula mucilaginosa, Yeasts, Botany, Madagascar, Cluster Analysis, [CHIM]Chemical Sciences, Flavor, biodiversity, 2. Zero hunger, Tropical Climate, Volatile Organic Compounds, General Medicine, Candida pararugosa, Yeast, Flavoring Agents, Fruit, Food Microbiology, Epiphyte, Gas chromatography, Reunion, Food Science, biotechnology
Abstract: International audience; In recent years, there has been an increasing interest in identifying and characterizing the yeast flora associated with diverse types of habitat because of the many potential desirable technological properties of these microorganisms, especially in food applications. In this study, a total of 101 yeast strains were isolated from the skins of tropical fruits collected in several locations in the South West Indian Ocean. Sequence analysis of the D1/D2 domains of the large subunit (LSU) ribosomal RNA gene identified 26 different species. Among them, two species isolated from the skins of Cape gooseberry and cocoa beans appeared to represent putative new yeast species, as their LSU D1/D2 sequence was only 97.1% and 97.4% identical to that of the yeasts Rhodotorula mucilaginosa and Candida pararugosa, respectively. A total of 52 Volatile Organic Compounds (VOCs) were detected by Head Space Solid Phase Micro Extraction coupled to Gas Chromatography and Mass Spectroscopy (HS–SPME–GC/MS) from the 26 yeast species cultivated on a glucose rich medium. Among these VOCs, 6 uncommon compounds were identified, namely ethyl but-2-enoate, ethyl 2-methylbut-2-enoate (ethyl tiglate), ethyl 3-methylbut-2-enoate, 2-methylpropyl 2-methylbut-2-enoate, butyl 2-methylbut-2-enoate and 3-methylbutyl 2-methylbut-2-enoate, making them possible yeast species-specific markers. In addition, statistical methods such as Principal Component Analysis allowed to associate each yeast species with a specific flavor profile. Among them, Saprochaete suaveolens (syn: Geotrichum fragrans) turned to be the best producer of flavor compounds, with a total of 32 out of the 52 identified VOCs in its flavor profile.
Published: 2015
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24. Rapid accumulation and low degradation: key parameters of Tomato yellow leaf curl virus persistence in its insect vector Bemisia tabaci

Author: Bernard Reynaud, Gaël Thébaud, Jean-Michel Lett, Loup Rimbaud, Nathalie Becker, Frédéric Chiroleu, Institut de Systématique, Evolution, Biodiversité (ISYEB ), Muséum national d'Histoire naturelle (MNHN)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Peuplements végétaux et bioagresseurs en milieu tropical (UMR PVBMT), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Université de La Réunion (UR), Biologie et Génétique des Interactions Plante-Parasite (UMR BGPI), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Region Reunion, European Union (FEDER), CIRAD (ATP Emergence et risques sanitaires), MNHN (CRCT), Biologie Intégrative des Populations, École pratique des hautes études (EPHE)-Centre National de la Recherche Scientifique (CNRS), UMR Peuplement Végétaux et Bioagresseurs en Milieu Tropical (UMR PVBMT - INRA), Institut National de la Recherche Agronomique (INRA), Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut National de la Recherche Agronomique (INRA), Becker, Nathalie, Rimbaud, Loup, Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-École Pratique des Hautes Études (EPHE), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)
Subjects: 0301 basic medicine, Géminivirus enroulement jaune tomat, Virologie, ADN, law.invention, Solanum lycopersicum, law, pathologie végétale, Polymerase chain reaction, Multidisciplinary, biology, virus de l'enroulement jaune de la tomate, food and beverages, PCR, geminiviridae, Begomovirus, [SDV.MP.VIR]Life Sciences [q-bio]/Microbiology and Parasitology/Virology, Phytopathology and phytopharmacy, Whitefly, Article, Hemiptera, 03 medical and health sciences, bemisia tabaci, Plant virus, Animals, Geminiviridae, Tomato yellow leaf curl virus, Transmission des maladies, Plant Diseases, H20 - Maladies des plantes, Virus des végétaux, biology.organism_classification, Virology, Phytopathologie et phytopharmacie, Insect Vectors, 030104 developmental biology, Viral replication, maladie virale, DNA, Viral, Leaf curl, Brassica oleracea
Abstract: Of worldwide economic importance, Tomato yellow leaf curl virus (TYLCV, Begomovirus) is responsible for one of the most devastating plant diseases in warm and temperate regions. The DNA begomoviruses (Geminiviridae) are transmitted by the whitefly species complex Bemisia tabaci. Although geminiviruses have long been described as circulative non-propagative viruses, observations such as long persistence of TYLCV in B. tabaci raised the question of their possible replication in the vector. We monitored two major TYLCV strains, Mild (Mld) and Israel (IL), in the invasive B. tabaci Middle East-Asia Minor 1 cryptic species, during and after the viral acquisition, within two timeframes (0–144 hours or 0–20 days). TYLCV DNA was quantified using real-time PCR and the complementary DNA strand of TYLCV involved in viral replication was specifically quantified using anchored real-time PCR. The DNA of both TYLCV strains accumulated exponentially during acquisition but remained stable after viral acquisition had stopped. Neither replication nor vertical transmission were observed. In conclusion, our quantification of the viral loads and complementary strands of both Mld and IL strains of TYLCV in B. tabaci point to an efficient accumulation and preservation mechanism, rather than to a dynamic equilibrium between replication and degradation.
Published: 2015
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25. Reproductive biology of an amphidromous goby, Sicyopterus lagocephalus, in La Réunion Island

Author: Raphaël Lagarde, Nils Teichert, Pierre Valade, Philippe Gaudin, Alexis Fostier, Ecologie Comportementale et Biologie des Populations de Poissons (ECOBIOP), Institut National de la Recherche Agronomique (INRA)-Université de Pau et des Pays de l'Adour (UPPA), Association Réunionnaise de Développement de l'Aquaculture (ARDA), Centre Régional d'Application Aquacole, Organisme Consultant en Environnement Aquatique, Laboratoire de Physiologie et Génomique des Poissons (LPGP), Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique )-Institut National de la Recherche Agronomique (INRA), The present study was conducted with the financial support of Electricite De France (22–30 avenue de Wagram, 75382 Paris Cedex 8), Office de l’Eau Reunion (49 rue Mazagran, 97,400 Saint Denis), Region Reunion (Avenue Rene Cassin, BP 7190, 97719 Saint Denis cedex 9), Parc national de La Reunion (112 rue Sainte Marie, 97400 St Denis) and the European Union (European Social Fund), and Institut National de la Recherche Agronomique (INRA)-Structure Fédérative de Recherche en Biologie et Santé de Rennes ( Biosit : Biologie - Santé - Innovation Technologique )
Subjects: Lagocephalus, biology, ovarian development, spawning pattern, reproductive strategy, [SDV.BA]Life Sciences [q-bio]/Animal biology, Fishing, gobiidae, Goby, Sicyopterus lagocephalus, Aquatic animal, Aquatic Science, biology.organism_classification, Fecundity, Fishery, amphidromy, Gonadosomatic Index, Reproductive biology, 14. Life underwater, ComputingMilieux_MISCELLANEOUS, sicyopterus lagocephalus
Abstract: International audience; In the Indo-Pacific region, rivers are inhabited by amphidromous gobies. They are often subjected to a heavy fishing pressure, highlighting the urgent need to acquire knowledge on their biology for management purposes. This study investigated the reproductive strategy of Sicyopterus lagocephalus, a widespread amphidromous goby, in two rivers of La Réunion Island. Histological observations of ovarian samples and oocyte-size frequency distributions revealed that females had a group-synchronous ovarian follicle development (i.e., two cohorts of oocytes were distinguished simultaneously in ovaries). Females laid an entire clutch in a unique event (from 14,304 to 232,475 eggs) and then another batch of oocytes was recruited, showing that the annual fecundity is indeterminate. Ovarian growth was isometric at all oocyte development stages showing that the gonadosomatic index (GSI) is a good proxy of reproductive condition. The main reproductive season of S. lagocephalus spanned from early February to May with a narrower range upstream and a wider one downstream. Reproduction activity is mainly restricted by water temperatures in upstream areas, whereas it is likely influenced by female body condition and competition in downstream areas. The variability of reproductive traits leads to size structure variation in stocks of spawning females throughout the year
Published: 2014
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26. Spawning-habitat selection of an Indo-Pacific amphidromous gobiid fish, Sicyopterus lagocephalus (Pallas)

Author: Pierre Bosc, Marine Richarson, Pierre Valade, Philippe Gaudin, Nils Teichert, Ecologie Comportementale et Biologie des Populations de Poissons (ECOBIOP), Institut National de la Recherche Agronomique (INRA)-Université de Pau et des Pays de l'Adour (UPPA), Association Réunionnaise pour le Développement de l'Aquaculture, Organisme Consultant en Environnement Aquatique, Fédération Départementale de Pêche et de Protection du Milieu Aquatique de la Réunion, Partenaires INRAE, Electricite De France, Office de l'Eau Reunion, Region Reunion, Parc National de La Reunion, and European Union (European Social Fund)
Subjects: 0106 biological sciences, RHINOGOBIUS SP DA, LIFE-HISTORY, Riffle, Cobble, [SDV]Life Sciences [q-bio], microhabitat, Aquatic Science, Oceanography, 010603 evolutionary biology, 01 natural sciences, GOBIOIDEI SICYDIINAE, ATLANTIC SALMON, PRESENCE-ONLY DATA, amphidromous species, SPECIES DISTRIBUTION, 14. Life underwater, Ecology, Evolution, Behavior and Systematics, Invertebrate, Lagocephalus, geography, geography.geographical_feature_category, REPRODUCTIVE-BIOLOGY, Ecology, biology, 010604 marine biology & hydrobiology, STREAM GOBY, MICROHABITAT USE, Sicyopterus lagocephalus, Estuary, biology.organism_classification, egg-clutch distribution, Fishery, Habitat, REUNION ISLAND, Sicydiinae, Gobiidae
Abstract: Freshwater-fish populations of the Indo-pacific region are characterised by a large proportion of amphidromous species. We analysed the spawning-habitat selection of Sicyopterus lagocephalus (Gobiidae: Sicydiinae) within two rivers of the Reunion Island. Reproduction traces are rare events, so a presence-only sampling procedure was performed to collect egg clutches and a random description of available habitat was conducted to generate pseudo-absence data. Logistic models showed a strong selection for microhabitat variables and mesohabitat units. S. lagocephalus selected areas where availability of potential nests was high (small cobble to small boulder) and where interstitial substratum allowed intragravel flow. Our results suggest that the availability of favourable substratum may be a limiting factor, which could result in occupancy of suboptimal areas. Water depth and velocity had less of an effect on the selection of a spawning area. Higher selection for shallow (30 cm s–1) geomorphic units, with an optimum for riffle and cascade, suggested that mesohabitat could be a satisfactory approach to quickly assess the availability of spawning areas within a watercourse for expertise studies.
Published: 2013
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26 results on '"Region Reunion"'

1. Adaptation of genetically monomorphic bacteria: evolution of copper resistance through multiple horizontal gene transfers of complex and versatile mobile genetic elements

2. Tree recruitment after native frugivore extinction? A field experiment to test the impact of fruit flesh persistence in a tropical oceanic island

3. The interacting effect of habitat amount, habitat diversity and fragmentation on insect diversity along elevational gradients

4. Selection of Microbial Targets for Treatments to Preserve Fresh Carrot Juice

5. Life history parameters and predation capacities of Nesidiocoris volucer: A new biological control agent for tomato crop

6. Selection by UV Mutagenesis and Physiological Characterization of Mutant Strains of the Yeast Saprochaete suaveolens (Former Geotrichum fragrans) with Higher Capacity to Produce Flavor Compounds

7. Mitochondrial genomes reveal diverse lineages of Diaphorina citri Kuwayama (Hemiptera: Sternorrhyncha: Psyllidae) in Kenya and La Réunion

8. Effects of maturity level, steam treatment, or active packaging to maintain the quality of minimally processed mango ( Mangifera indica cv. José)

9. Contribution of historical herbarium small RNAs to the reconstruction of a cassava mosaic geminivirus evolutionary history

10. Water temperature influences larval survival of the amphidromous goby Sicyopterus lagocephalus

11. Maintaining Physicochemical, Microbiological, and Sensory Quality of Pineapple Juice (Ananas comosus, Var. ‘Queen Victoria’) through Mild Heat Treatment

12. Identification of flux checkpoints in a metabolic pathway through white-box, grey-box and black-box modeling approaches

13. Role of biological control agents and physical treatments in maintaining the quality of fresh and minimally-processed fruit and vegetables

14. Flux prediction using artificial neural network (ANN) for the upper part of glycolysis

15. Impact of host endosymbionts on parasitoid host range — from mechanisms to communities

16. Breeding pattern and nest guarding in Sicyopterus lagocephalus, a widespread amphidromous Gobiidae

17. Working fluid selection general method and sensitivity analysis of an Organic Rankine Cycle (ORC): application to Ocean Thermal Energy Conversion (OTEC)

18. Fungal adaptation to contemporary fungicide applications: the case of Botrytis cinerea populations from Champagne vineyards (France)

19. Occurrence of a novel mastrevirus in sugarcane germplasm collections in Florida, Guadeloupe and Reunion

20. A review of fault tolerant control strategies applied to proton exchange membrane fuel cell systems

21. Life-history traits of Encarsia guadeloupae, a natural enemy of the invasive spiralling whitefly Aleurodicus dispersus

22. Physiological and biochemical characteristics of the ethyl tiglate production pathway in the yeast Saprochaete suaveolens

23. A comparative study on the potential of epiphytic yeasts isolated from tropical fruits to produce flavoring compounds

24. Rapid accumulation and low degradation: key parameters of Tomato yellow leaf curl virus persistence in its insect vector Bemisia tabaci

25. Reproductive biology of an amphidromous goby, Sicyopterus lagocephalus, in La Réunion Island

26. Spawning-habitat selection of an Indo-Pacific amphidromous gobiid fish, Sicyopterus lagocephalus (Pallas)

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26 results on '"Region Reunion"'

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