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Start Over Author "Célia Bordier" Topic 03 medical and health sciences
5 results on '"Célia Bordier"'

1. Chemical detection triggers honey bee defense against a destructive parasitic threat

Author

Dominique Beslay, Guy Costagliola, Fanny Mondet, Alison R. Mercer, Yves Le Conte, Célia Bordier, Nicolas Barthes, Benoit Lapeyre, Benjamin Basso, Maxime R. Hervé, Solene Blanchard, Seo Hyun Kim, Abeilles et Environnement (AE), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), University of Otago [Dunedin, Nouvelle-Zélande], UMT PrADE, Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Université Paul-Valéry - Montpellier 3 (UPVM)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-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), Unité de recherche Plantes et Systèmes de Culture Horticoles (PSH), Institut de Génétique, Environnement et Protection des Plantes (IGEPP), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-AGROCAMPUS OUEST, Institut Technique et Scientifique de l'Apiculture et de la Pollinisation (ITSAP-Institut de l'Abeille), Fondation de France (France - New Zealand Friendship Fund) French Ministry of Agriculture (CASDAR, Mosar) NZIDRS, UMT Protection des abeilles dans l’environnement (UMT PrADE), Association pour le Developpement de l'Apiculture Provencale (ADAPI)-Institut de l'abeille (ITSAP)-Centre National de la Recherche Scientifique (CNRS)-Terres Inovia-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Université Paul-Valéry - Montpellier 3 (UPVM)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-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, 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 Rennes (UR)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-INSTITUT AGRO Agrocampus Ouest, and Institut de l'abeille (ITSAP)

Subjects
Beekeeping, Varroidae, Defence mechanisms, Zoology, Biology, Acetates, Complex Mixtures, Host-Parasite Interactions, 03 medical and health sciences, Animals, Molecular Biology, 030304 developmental biology, 0303 health sciences, Behavior, Animal, Mechanism (biology), Host (biology), [SDV.BA]Life Sciences [q-bio]/Animal biology, 030302 biochemistry & molecular biology, fungi, Cell Biology, Honey bee, Bees, Ketones, biology.organism_classification, Brood, Varroa destructor, behavior and behavior mechanisms, Varroa, Biological Assay, Female
Abstract

International audience; Invasive species events related to globalization are increasing, resulting in parasitic outbreaks. Understanding of host defense mechanisms is needed to predict and mitigate against the consequences of parasite invasion. Using the honey bee Apis mellifera and the mite Varroa destructor, as a host–parasite model, we provide a comprehensive study of a mechanism of parasite detection that triggers a behavioral defense associated with social immunity. Six Varroa-parasitization-specific (VPS) compounds are identified that trigger Varroa-sensitive hygiene (VSH, bees’ key defense against Varroa sp.), enable the selective recognition of a parasitized brood and induce responses that mimic intrinsic VSH activity in bee colonies. We also show that individuals engaged in VSH exhibit a unique ability to discriminate VPS compounds from healthy brood signals. These findings enhance our understanding of a critical mechanism of host defense against parasites, and have the potential to apply the integration of pest management in the beekeeping sector.

Published
2021
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2. Stress decreases pollen foraging performance in honeybees

Author

Andrew B. Barron, Simon Klein, Yves Le Conte, Célia Bordier, Cédric Alaux, ALAUX, Cédric, Abeilles & Environnement (UR 406 ), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Centre National de la Recherche Scientifique (CNRS), Department of Biological Sciences, Macquarie University, and ANR-13-ADAP-0002

Subjects
0106 biological sciences, 0301 basic medicine, Physiology, [SDV]Life Sciences [q-bio], Nectar foraging, Foraging, réponse immunitaire, Zoology, Aquatic Science, Biology, medicine.disease_cause, 010603 evolutionary biology, 01 natural sciences, Random Allocation, 03 medical and health sciences, apis mellifera, biogenic amine, Stress, Physiological, Pollen, medicine, otorhinolaryngologic diseases, Animals, Nectar, Pollination, Octopamine, Molecular Biology, Ecology, Evolution, Behavior and Systematics, RFID, immune challenge, pollen foraging, Brain, food and beverages, butinage, Feeding Behavior, Honey bee, Bees, Flight behaviour, 030104 developmental biology, Insect Science, amine biogénique, [SDE]Environmental Sciences, Metabolic rate, colonie, cerveau, Animal Science and Zoology, New South Wales
Abstract

Foraging in honeybees is energetically demanding. Here, we examined whether stressors, which generally increase metabolic demands, can impair foraging performance. A controlled non-pathogenic stressor (immune challenge) resulted in a change in the foraging preferences of bees. It reduced pollen foraging and increased the duration of trips in pollen foragers. Stress also reduced the amount of octopamine in the brain of pollen foragers (a biogenic amine involved in the regulation of foraging and flight behaviour in insects). According to the literature, flight metabolic rate is higher during pollen foraging than during nectar foraging, and nectar gives a higher energetic return relative to the foraging effort when compared with pollen. We thus propose that stress might be particularly detrimental to the performance of pollen foragers, and stressed bees prefer the energy-rich resource of nectar. In conclusion, stress, even at low levels, could have consequences for bee foraging behaviour and thereby the nutritional balance of the colony.

Published
2018
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3. Colony adaptive response to simulated heat waves and consequences at the individual level in honeybees (Apis mellifera)

Author

Didier Crauser, Michel Pélissier, Hélène Dechatre, Maryline Pioz, Samuel Soubeyrand, Yves Le Conte, Séverine Suchail, Célia Bordier, Cédric Alaux, Mathilde Peruzzi, Abeilles et Environnement (AE), Institut National de la Recherche Agronomique (INRA)-Avignon Université (AU), 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), Biostatistique et Processus Spatiaux (BIOSP), Institut National de la Recherche Agronomique (INRA), ANR-13-ADAP-0002, Avignon Université (AU)-Aix Marseille Université (AMU)-Institut de recherche pour le développement [IRD] : UMR237-Centre National de la Recherche Scientifique (CNRS), Biostatistique et Processus Spatiaux (BioSP), and Bordier, Célia

Subjects
0106 biological sciences, 0301 basic medicine, Thermotolerance, Hot Temperature, Science, media_common.quotation_subject, [SDV]Life Sciences [q-bio], Foraging, Insect, flux de chaleur, food habits, 010603 evolutionary biology, 01 natural sciences, Article, 03 medical and health sciences, Extreme weather, colonie d'abeilles, apis mellifera, Pollinator, Deformed wing virus, Animals, thermorégulation, media_common, thermoregulation, Multidisciplinary, physiologie animale, biology, comportement alimentaire, Ecology, Simulation de Vagues de Chaleur (SHW), Adaptive response, Thermoregulation, Bees, biology.organism_classification, Brood, Oxidative Stress, 030104 developmental biology, 13. Climate action, Medicine
Abstract

Since climate change is expected to bring more severe and frequent extreme weather events such as heat waves, assessing the physiological and behavioural sensitivity of organisms to temperature becomes a priority. We therefore investigated the responses of honeybees, an important insect pollinator, to simulated heat waves (SHW). Honeybees are known to maintain strict brood thermoregulation, but the consequences at the colony and individual levels remain poorly understood. For the first time, we quantified and modelled colony real-time activity and found a 70% increase in foraging activity with SHW, which was likely due to the recruitment of previously inactive bees. Pollen and nectar foraging was not impacted, but an increase in water foragers was observed at the expense of empty bees. Contrary to individual energetic resources, vitellogenin levels increased with SHW, probably to protect bees against oxidative stress. Finally, though immune functions were not altered, we observed a significant decrease in deformed wing virus loads with SHW. In conclusion, we demonstrated that honeybees could remarkably adapt to heat waves without a cost at the individual level and on resource flow. However, the recruitment of backup foraging forces might be costly by lowering the colony buffering capacity against additional environmental pressures.

Published
2017
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4. Stress response in honeybees is associated with changes in task-related physiology and energetic metabolism

Author

Cédric Alaux, Jean-Marc Devaud, Maryline Pioz, Claude Collet, Yves Le Conte, Mercedes Charreton, Célia Bordier, Séverine Suchail, Abeilles et Environnement (AE), Institut National de la Recherche Agronomique (INRA)-Avignon Université (AU), 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), Centre de Recherches sur la Cognition Animale (CRCA), Centre de Biologie Intégrative (CBI), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut des sciences du cerveau de Toulouse. (ISCT), Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse - Jean Jaurès (UT2J)-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS), Université Fédérale Toulouse Midi-Pyrénées, ANR-13-ADAP-0002, Institut des sciences du cerveau de Toulouse. (ISCT), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Avignon Université (AU)-Aix Marseille Université (AMU)-Institut de recherche pour le développement [IRD] : UMR237-Centre National de la Recherche Scientifique (CNRS), Centre de Recherches sur la Cognition Animale - UMR5169 (CRCA), Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre Hospitalier Universitaire de Toulouse (CHU Toulouse)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Centre Hospitalier Universitaire de Toulouse (CHU Toulouse)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre de Biologie Intégrative (CBI), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Université de Toulouse (UT), and Avignon Université (AU)-Institut National de la Recherche Agronomique (INRA)

Subjects
0106 biological sciences, 0301 basic medicine, Physiology, Juvenile-hormone esterase, [SDV]Life Sciences [q-bio], Gene Expression, 01 natural sciences, heat stress, chemistry.chemical_compound, apis mellifera, homeostasis, perturbation du métabolisme, division du travail, biology, Glycogen, Energetic metabolism, Thermoregulation, Bees, Insect Proteins, France, stress thermique, immunodéficit, métabolisme énergétique, Division of labour, 03 medical and health sciences, Vitellogenin, Immune system, Stress, Physiological, réponse au stress, Animals, Adipokinetic hormone, Pesticides, pesticide, changement physiologique, homéostasie, Stressor, fungi, immune deficiency, Immune challenge, Brood, 010602 entomology, 030104 developmental biology, chemistry, 13. Climate action, Insect Science, biology.protein, Basal Metabolism, Carboxylic Ester Hydrolases
Abstract

In a rapidly changing environment, honeybee colonies are increasingly exposed to diverse sources of stress (e.g., new parasites, pesticides, climate warming), which represent a challenge to individual and social homeostasis. However, bee physiological responses to stress remain poorly understood. We therefore exposed bees specialised in different tasks (nurses, guards and foragers) to ancient (immune and heat stress) or historically more recent sources of stress (pesticides), and we determined changes in the expression of genes linked to behavioural maturation (vitellogenin – vg and juvenile hormone esterase – jhe) as well as in energetic metabolism (glycogen level, expression level of the receptor to the adipokinetic hormone – akhr, and endothermic performance). While acute exposure to sublethal doses of two pesticides did not affect vg and jhe expression, immune and heat challenges caused a decrease and increase in both genes, respectively, suggesting that bees had responded to ecologically relevant stressors. Since vg and jhe are expressed to a higher level in nurses than in foragers, it is reasonable to assume that an immune challenge stimulated behavioural maturation to decrease potential contamination risk and that a heat challenge promoted a nurse profile for brood thermoregulation. All behavioural castes responded in the same way. Though endothermic performances did not change upon stress exposure, the akhr level dropped in immune and heat-challenged individuals. Similarly, the abdomen glycogen level tended to decline in immune-challenged bees. Altogether, these results suggest that bee responses are stress specific and adaptive but that they tend to entail a reduction of energetic metabolism that needs to be studied on a longer timescale.

Published
2017
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5. Should I stay or should I go: honeybee drifting behaviour as a function of parasitism

Author

Yves Le Conte, Cédric Alaux, Didier Crauser, Maryline Pioz, Célia Bordier, Abeilles et Environnement (AE), Institut National de la Recherche Agronomique (INRA)-Avignon Université (AU), UMT PrADE, ANR-13-ADAP-0002, and Bordier, Celia

Subjects
0106 biological sciences, 0301 basic medicine, [SDV]Life Sciences [q-bio], parasitism, sud est france, parasitisme, Parasitism, Biology, 010603 evolutionary biology, 01 natural sciences, drifting, 03 medical and health sciences, colonie d'abeilles, apis mellifera, Nest, skeps, statistical analysis, nosema ceranae, paraite, analyse statistique, Ecology, Stress induced, fungi, biology.organism_classification, Nosema ceranae, Apis mellifera, epidiemologic risk, suivi des vols, 030104 developmental biology, Insect Science, Disease transmission, ruche, compteur d'abeilles
Abstract

Nest drifting is often observed in honeybees (Apis mellifera) and can be detrimental to neighbouring colonies because it has the potential to increase disease transmission. However, the characteristics of drifting behaviour over a honeybee’s lifetime and the influence of parasitism on this phenomenon have been insufficiently investigated. Using optical bee counters, we tracked the drifting behaviour of workers that were either infected with the parasite Nosema ceranae or uninfected. Approximately 10 % of the tracked bees drifted into a foreign colony. The drifting prevalence was influenced by the colony’s location in space but not by N. ceranae parasitism. However, the number and duration of drifts changed over the lifetime of the bees and the season, and parasitism had an effect on drifters, with Nosema-infected bees performing more but shorter drifts. This phenomenon was more pronounced in old bees (+62 and −15 % for the number and duration of drifts, respectively) and could potentially be explained by the energetic stress induced by the parasite. In conclusion, combining a detailed analysis of drifting behaviour with the actual risk of newly established disease in colonies will benefit our knowledge of bee epidemiology.

Published
2017
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