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1. Changes in soil diversity and global activities following invasions of the exotic invasive plant, Amaranthus viridis L., decrease the growth of native sahelian Acacia species

Author

Aurélie Cébron, Ibrahima Ndoye, Arsene Sanon, Corinne Leyval, Robin Duponnois, Jacques Berthelin, Thierry Beguiristain, and Samba Ndao Sylla

Subjects
Ecology, biology, Soil biology, fungi, Acacia, Introduced species, Native plant, biology.organism_classification, Applied Microbiology and Biotechnology, Microbiology, Invasive species, Symbiosis, Microbial population biology, Botany, Woody plant
Abstract

The objectives of this study were to determine whether the invasive plant Amaranthus viridis influenced soil microbial and chemical properties and to assess the consequences of these modifications on native plant growth. The experiment was conducted in Senegal at two sites: one invaded by A. viridis and the other covered by other plant species. Soil nutrient contents as well as microbial community density, diversity and functions were measured. Additionally, five sahelian Acacia species were grown in (1) soil disinfected or not collected from both sites, (2) uninvaded soil exposed to an A. viridis plant aqueous extract and (3) soil collected from invaded and uninvaded sites and inoculated or not with the arbuscular mycorrhizal (AM) fungus Glomus intraradices. The results showed that the invasion of A. viridis increased soil nutrient availability, bacterial abundance and microbial activities. In contrast, AM fungi and rhizobial development and the growth of Acacia species were severely reduced in A. viridis-invaded soil. Amaranthus viridis aqueous extract also exhibited an inhibitory effect on rhizobial growth, indicating an antibacterial activity of this plant extract. However, the inoculation of G. intraradices was highly beneficial to the growth and nodulation of Acacia species. These results highlight the role of AM symbiosis in the processes involved in plant coexistence and in ecosystem management programs that target preservation of native plant diversity.

Published
2009
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2. Arbuscular mycorrhizal symbiosis can counterbalance the negative influence of the exotic tree species Eucalyptus camaldulensis on the structure and functioning of soil microbial communities in a sahelian soil

Author

Marija Kisa, Michel Lepage, Lamine Dieng, Jacques Berthelin, Komi Assigbetse, Robin Duponnois, Arsene Sanon, Antoine Galiana, Jean Thioulouse, Yves Prin, Rodolphe Spichiger, and Samba Ndao Sylla

Subjects
2. Zero hunger, 0106 biological sciences, Ecology, biology, Soil biology, Species diversity, 04 agricultural and veterinary sciences, 15. Life on land, biology.organism_classification, 010603 evolutionary biology, 01 natural sciences, Applied Microbiology and Biotechnology, Microbiology, Eucalyptus, Eucalyptus camaldulensis, Agronomy, Soil water, Botany, 040103 agronomy & agriculture, 0401 agriculture, forestry, and fisheries, Mycorrhiza, Soil microbiology, Glomus
Abstract

The hypothesis of the present study was that bacterial communities would differentiate under Eucalyptus camaldulensis and that an enhancement of arbuscular mycorrhizal (AM) density would minimize this exotic plant species effect. Treatments consisted of control plants, preplanting fertilizer application and AM inoculation. After 4 months of culture in autoclaved soil, E. camaldulensis seedlings were either harvested for growth measurement or transferred into containers filled with the same soil but not sterilized. Other containers were kept without E. camaldulensis seedlings. After 12 months, effects of fertilizer amendment and AM inoculation were measured on the growth of Eucalyptus seedlings and on soil microbial communities. The results clearly show that this plant species significantly modified the soil bacterial community. Both community structure (assessed by denaturing gradient gel electrophoresis profiles) and function (assessed by substrate-induced respiration responses including soil catabolic evenness) were significantly affected. Such changes in the bacterial structure and function were accompanied by disturbances in the composition of the herbaceous plant species layer. These results highlight the role of AM symbiosis in the processes involved in soil bio-functioning and plant coexistence and in afforestation programmes with exotic tree species that target preservation of native plant diversity.

Published
2007
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3. Displacement of an herbaceous plant species community by mycorrhizal and non-mycorrhizal Gmelina arborea, an exotic tree, grown in a microcosm experiment

Author

Christian Plenchette, Michel Lepage, Robin Duponnois, Jean Thioulouse, Rodolphe Spichiger, Pascal Martin, Arsene Sanon, Laboratoire des symbioses tropicales et méditerranéennes (UMR LSTM), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Université Montpellier 1 (UM1)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Université Montpellier 2 - Sciences et Techniques (UM2)-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), Conservatoire et Jardin Botaniques de Genève, Ecologie quantitative et évolutive des communautés, Département écologie évolutive [LBBE], 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)-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)-Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), 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), Biologie et Gestion des Adventices (BGA), Etablissement National d'Enseignement Supérieur Agronomique de Dijon (ENESAD)-Institut National de la Recherche Agronomique (INRA)-Université de Bourgogne (UB), Biogéochimie et écologie des milieux continentaux (Bioemco), Centre National de la Recherche Scientifique (CNRS)-AgroParisTech-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Recherche Agronomique (INRA)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), Séquestration du carbone et bio- fonctionnement des sols : effets des modes de gestion des agro-écosystèmes tropicaux (SEQBIO), Université de Bourgogne (UB)-Institut National de la Recherche Agronomique (INRA)-Etablissement National d'Enseignement Supérieur Agronomique de Dijon (ENESAD), Laboratoire des symbioses tropicales et méditerranéennes ( LSTM ), Centre de Coopération Internationale en Recherche Agronomique pour le Développement ( CIRAD ) -Université Montpellier 1 ( UM1 ) -Institut National de la Recherche Agronomique ( INRA ) -Université Montpellier 2 - Sciences et Techniques ( UM2 ) -Université de Montpellier ( UM ) -Institut national d’études supérieures agronomiques de Montpellier ( Montpellier SupAgro ), Laboratoire de Biométrie et Biologie Evolutive ( LBBE ), Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique ( Inria ) -Centre National de la Recherche Scientifique ( CNRS ), Biologie et Gestion des Adventices ( BGA ), Etablissement National d'Enseignement Supérieur Agronomique de Dijon ( ENESAD ) -Institut National de la Recherche Agronomique ( INRA ) -Université de Bourgogne ( UB ), Biogéochimie et écologie des milieux continentaux ( Bioemco ), École normale supérieure - Paris ( ENS Paris ) -Institut National de la Recherche Agronomique ( INRA ) -Université Pierre et Marie Curie - Paris 6 ( UPMC ) -AgroParisTech-Université Paris-Est Créteil Val-de-Marne - Paris 12 ( UPEC UP12 ) -Centre National de la Recherche Scientifique ( CNRS ), Séquestration du carbone et bio- fonctionnement des sols : effets des modes de gestion des agro-écosystèmes tropicaux ( SEQBIO ), Conservatoire et Jardin Botaniques de Genève (CJBG), École normale supérieure - Paris (ENS-PSL), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AgroParisTech-Centre National de la Recherche Scientifique (CNRS)

Subjects
0106 biological sciences, catabolic diversity, Plant Science, engineering.material, 01 natural sciences, [ SDV.EE ] Life Sciences [q-bio]/Ecology, environment, Species Specificity, Mycorrhizae, AMF, Botany, Genetics, Mycorrhiza, Molecular Biology, ComputingMilieux_MISCELLANEOUS, Ecology, Evolution, Behavior and Systematics, Allelopathy, [SDV.EE]Life Sciences [q-bio]/Ecology, environment, Lamiaceae, Catabolic biodiversity, biology, fungi, food and beverages, Plant community, 04 agricultural and veterinary sciences, General Medicine, 15. Life on land, Herbaceous plant, biology.organism_classification, plant diversity, Soil conditioner, Horticulture, Plant diversity, Seedlings, 040103 agronomy & agriculture, engineering, 0401 agriculture, forestry, and fisheries, Glomus intraradices, Fertilizer, Gmelina, Gmelina arborea, 010606 plant biology & botany, Woody plant
Abstract

International audience; Gmelina arborea Roxb. (Gmelina, Yemane) is a fast growing tree, native from India and considered as a potentially invasive woody plant in West Africa. Mycorrhizal inoculation of seedlings with Glomus intraradices was performed to study (1) the effect on the growth of G. arborea, (2) the impact on the catabolic diversity of soil microbial communities and (3) the influence on the structure of herbaceous plant species communities in microcosms. Treatments consisted of control plants, pre-planting fertilizer application and arbuscular mycorrhizal (AM) inoculation. After 4 months’ culture in autoclaved soil, G. arborea seedlings were either harvested for growth measurement or transferred into containers filled with the same soil but not sterilized. Other containers were kept without G. arborea seedlings. After 12 months’ further culture, effects of fertilizer amendment and AM inoculation on the growth of G. arborea seedlings were recorded. AM colonization was significantly and positively correlated with plant diversity. The substrate-induced respiration response to carboxylic acids was significantly higher in the absence of G. arborea and in the presence of G. intraradices as compared to the other treatments. The influence of AM symbiosis on plant coexistence and on allelopathic processes of invasive plants are discussed.

Published
2005
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4. La Grande Muraille Verte : capitalisation des recherches et valorisation des savoirs locaux

Author

Amadou Bâ, Arsene Sanon, Antoine Galiana, René Bally, Hervé Sanguin, Mohamed Hafidi, Ezékiel Baudoin, Yves Prin, Robin Duponnois, Sanâa Wahbi, Dia, A. (ed.), and Duponnois, Robin (ed.)

Subjects
F08 - Systèmes et modes de culture, H60 - Mauvaises herbes et désherbage, Mycorhizé à vésicule et arbuscule, F62 - Physiologie végétale : croissance et développement, conservation de la nature, Environmental studies, Geography & Development, reforestation, développement rural, champignons mycorhiziens à arbuscules, NUTRITION MINERALE, arbre, FERTILITE DU SOL, AGROFORESTERIE, biotechnologie, Nutrition des plantes, environnement, PRATIQUE CULTURALE, Sol tropical, Pratique culturale, Agroécosystème, MYCORHIZE, RN, fertilité des sols, Stress dû à la sécheresse, Symbiose, plante utile, Phosphate, plantation, Striga, Biology, gestion de l’environnement, EVOLUTION DES SOLS SOUS CULTURE, Fertilité du sol, SYMBIOSE, PARASITE, LUTTE BIOLOGIQUE, PHOSPHORE, P35 - Fertilité du sol, sylviculture, sols tropicaux arides, LUTTE PHYTOSANITAIRE, SCI026000, Zone aride, Plante de culture, désertification, ROTATION DES CULTURES, méthode de lutte (santé)
Abstract

Les contraintes majeures qui limitent la productivité des agroécosystèmes en milieu arides sont généralement attribuées aux carences minérales [plus particulièrement en phosphore (P) et en azote (N)], à un déficit en eau, aux processus d’érosion hydrique et éolienne, ainsi qu’à des perturbations dans le biofonctionnement du sol (faible diversité génétique et fonctionnelle de la microflore tellurique, etc.). Lorsque ces milieux ne sont pas soumis à une surexploitation, ils présentent une activité biologique élevée. Il a été ainsi suggéré que leur valorisation via des stratégies culturales adéquates pouvait réactiver les processus écologiques impliqués dans le maintien de la fertilité des sols et ainsi assurer une meilleure productivité de l’agro-écosystème. La plupart des plantes de ces régions arides (espèces sauvages ou cultivées) sont associées à des champignons mycorhiziens à arbuscules (CMA). Ces symbiotes fongiques sont reconnus comme étant des composantes microbiennes majeures dans le déroulement des principaux cycles biogéochimiques des sols (C, P et N) et en conséquence dans le développement des plantes en améliorant leur nutrition minérale mais aussi hydrique et leur état sanitaire. Paradoxalement, leur valorisation au sein d’itinéraires culturaux reste encore très limitée, voire inexistante. Ce chapitre a pour objectifs principaux de décrire le rôle des CMA dans le maintien et l’amélioration de la fertilité des sols et sur le développement des plantes tant au niveau de leur nutrition minérale, de leur résistance au stress hydrique que de l’état sanitaire des sols cultivés (ex. : lutte contre Striga spp.). Des stratégies d’ingénierie écologique seront ensuite proposées afin d’optimiser certaines techniques culturales (ex. : agroforesterie) dans le rôle de maintien du potentiel infectieux mycorhizogène des sols en relation avec une pleine expression des propriétés de la symbiose mycorhizienne sur les plantes cultivées, permettant ainsi d’atteindre des rendements culturaux compatibles avec les besoins des populations locales.

Published
2013

6. Differences in nutrient availability and mycorrhizal infectivity in soils invaded by an exotic plant negatively influence the development of indigenous Acacia species

Author

Jacques Berthelin, Thierry Beguiristain, Samba Ndao Sylla, Robin Duponnois, Aurélie Cébron, Arsene Sanon, Sastre-Conde, I. (ed.), Poggi-Varaldo, M.H. (ed.), Lobo, M.C. (ed.), Sanz, J.L. (ed.), Macarie, Hervé (ed.), Université Cheikh Anta Diop [Dakar, Sénégal] (UCAD), Dept Biol Vegetale, UniTO, Université de Lorraine (UL), Laboratoire des symbioses tropicales et méditerranéennes (UMR LSTM), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Université Montpellier 1 (UM1)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Université Montpellier 2 - Sciences et Techniques (UM2)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (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, Amaranthus viridis, [SDV]Life Sciences [q-bio], INVASION, Introduced species, 01 natural sciences, Soil, Nutrient, Mycorrhizae, CROISSANCE, Waste Management and Disposal, Soil Microbiology, Amaranthus, biology, Soil microflora, NODULE RACINAIRE, LEGUMINEUSE, Acacia, Soil chemistry, 04 agricultural and veterinary sciences, General Medicine, Exotic invasive plant, Biota, Senegal, INVASIVE PLANT, L, GROWTH, RELATION SOL PLANTE, COLONISATION, MYCORHIZE, Soil microbiology, GERMINATION, Environmental Engineering, CHIMIE DU SOL, Soil biology, ADVENTICE, Management, Monitoring, Policy and Law, complex mixtures, 010603 evolutionary biology, DISPONIBILITE EN NUTRIMENTS, Propagule, Botany, ETUDE COMPARATIVE, Symbiosis, DENSITE, FEEDBACK, MICROBIOLOGIE DU SOL, FUNGI, 15. Life on land, biology.organism_classification, Arbuscular Mycorrhizal fungi, Agronomy, Soil water, 040103 agronomy & agriculture, 0401 agriculture, forestry, and fisheries, ETUDE EXPERIMENTALE, Introduced Species, COMMUNITIES
Abstract

International audience; Plant species (exotic invasive vs native non-invasive) colonization pattern and the relation with the soil nutrient availability and AM fungi abundance, was investigated. Soil samples were collected from two sites: one invaded by the exotic plant. Amaranthus viridis, and one uninvaded site for chemical and AM propagules density analyses. Additionally, we grew five Sahelian Acacia species in soil from the two sites, sterilized or not, to test the involvement of soil biota in the invasion process. While nutrient availability was significantly higher in soil samples from the invaded sites, a drastic reduction in AM fungal community density, was observed. Moreover, Acacia seedlings' growth was severely reduced in soils invaded by Amaranthus and this effect was similar to that of sterilized soil of both origins. The observed growth inhibition was accompanied by reduction of AM colonization and nodulation of the roots. Finally, the influence of soil chemistry and AM symbiosis on exotic plants' invasion processes is discussed. (C) 2011 Elsevier Ltd. All rights reserved.

Published
2012
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7. Changes in soil diversity and global activities following invasions of the exotic invasive plant, Amaranthus viridis L., decrease the growth of native sahelian Acacia species

Author

Arsene, Sanon, Thierry, Béguiristain, Aurelie, Cébron, Jacques, Berthelin, Ibrahima, Ndoye, Corinne, Leyval, Samba, Sylla, and Robin, Duponnois

Subjects
DNA, Bacterial, Soil, Amaranthus, Bacteria, Mycorrhizae, RNA, Ribosomal, 16S, Acacia, Glomeromycota, Symbiosis, Ecosystem, Soil Microbiology
Abstract

The objectives of this study were to determine whether the invasive plant Amaranthus viridis influenced soil microbial and chemical properties and to assess the consequences of these modifications on native plant growth. The experiment was conducted in Senegal at two sites: one invaded by A. viridis and the other covered by other plant species. Soil nutrient contents as well as microbial community density, diversity and functions were measured. Additionally, five sahelian Acacia species were grown in (1) soil disinfected or not collected from both sites, (2) uninvaded soil exposed to an A. viridis plant aqueous extract and (3) soil collected from invaded and uninvaded sites and inoculated or not with the arbuscular mycorrhizal (AM) fungus Glomus intraradices. The results showed that the invasion of A. viridis increased soil nutrient availability, bacterial abundance and microbial activities. In contrast, AM fungi and rhizobial development and the growth of Acacia species were severely reduced in A. viridis-invaded soil. Amaranthus viridis aqueous extract also exhibited an inhibitory effect on rhizobial growth, indicating an antibacterial activity of this plant extract. However, the inoculation of G. intraradices was highly beneficial to the growth and nodulation of Acacia species. These results highlight the role of AM symbiosis in the processes involved in plant coexistence and in ecosystem management programs that target preservation of native plant diversity.

Published
2009

8. Rhizosphere microbiota interfers with plant-plant interactions

Author

Jean Thioulouse, Y. Prin, Robin Duponnois, Arsene Sanon, Gilles Comte, Z. N. Andrianjaka, René Bally, Laboratoire commun de Microbiologie, Laboratoire d'Ecologie Microbienne - UMR 5557 (LEM), Institut National de la Recherche Agronomique (INRA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Ecole Nationale Vétérinaire de Lyon (ENVL)-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), Laboratoire des symbioses tropicales et méditerranéennes (UMR LSTM), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Université Montpellier 1 (UM1)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Université Montpellier 2 - Sciences et Techniques (UM2)-Université de Montpellier (UM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), 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), Ecologie quantitative et évolutive des communautés, Département écologie évolutive [LBBE], 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)-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)-Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Ecole Nationale Vétérinaire de Lyon (ENVL), 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), Ecologie microbienne ( EM ), Centre National de la Recherche Scientifique ( CNRS ) -Ecole Nationale Vétérinaire de Lyon ( ENVL ) -Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Institut National de la Recherche Agronomique ( INRA ) -VetAgro Sup ( VAS ), Laboratoire des symbioses tropicales et méditerranéennes ( LSTM ), Centre de Coopération Internationale en Recherche Agronomique pour le Développement ( CIRAD ) -Université Montpellier 1 ( UM1 ) -Institut National de la Recherche Agronomique ( INRA ) -Université Montpellier 2 - Sciences et Techniques ( UM2 ) -Université de Montpellier ( UM ) -Institut national d’études supérieures agronomiques de Montpellier ( Montpellier SupAgro ), Laboratoire de Biométrie et Biologie Evolutive ( LBBE ), Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique ( Inria ) -Centre National de la Recherche Scientifique ( CNRS ), Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Vétérinaire de Lyon (ENVL)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de la Recherche Agronomique (INRA)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)

Subjects
0106 biological sciences, Introduced species, F62 - Physiologie végétale - Croissance et développement, Plant Science, Plant invasions, H60 - Mauvaises herbes et désherbage, 01 natural sciences, Rhizosphere, 0303 health sciences, Ecology, Plant-soil feedbacks, Plant physiology, food and beverages, Compétition végétale, Plante, Micro-organisme du sol, Allelopathy, Allelopathy . Rhizosphere . Plant invasions . Plant-soil feedbacks . Parasitic plant, F40 - Écologie végétale, Parasitic plant, Relation plante sol, Soil Science, [ SDV.BBM.BM ] Life Sciences [q-bio]/Biochemistry, Molecular Biology/Molecular biology, Relation hôte pathogène, Biology, 010603 evolutionary biology, 03 medical and health sciences, Botany, Flore du sol, Ecosystem, 030304 developmental biology, Herbivore, [ SDE.BE ] Environmental Sciences/Biodiversity and Ecology, fungi, P34 - Biologie du sol, [SDV.BBM.BM]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Molecular biology, 15. Life on land, biology.organism_classification, Plante parasite, Microbial population biology, Rhizosphère, Allélopathie, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, 010606 plant biology & botany, Espèce envahissante
Abstract

Erratum paru dans Plant and soil (2009) 325 (1-2) p. 351-352 http://dx.doi.org/10.1007/s11104-009-0100-4. Diversity, structure and productivity of above-ground compartment of terrestrial ecosystems have been generally considered as the main drivers of the relationships between diversity and ecosystem functioning. More recently it has been suggested that plant population dynamics may be linked with the development of the below-ground community. The biologically active soil zone where root-root and rootmicrobe communications occur is named "Rhizosphere" where root exudates play active roles in regulating rhizosphere interactions. Root exudation can regulate the soil microbial community, withstand herbivory, facilitate beneficial symbioses, modify the chemical and physical soil properties and inhibit the growth of competing plant species. In this review, we explore the current knowledge assessing the importance of root exudates in plant interactions, in communications between parasitic plants and their hosts and how some soil microbial components could regulate plant species coexistence and change relationships between plants. This review will be focussed on several well documented biological processes regulating plant-plant communications such as exotic plant species invasions, negative root-root communication (allelopathy) and parasitic plant / host plant interactions and how some soil microbial components can interfere with signal traffic between roots. The reported data show that the overall effect of one plant to another results from multiple interacting mechanisms where soil microbiota can be considered as a key component.

Published
2009
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9. Displacement of an herbaceous plant species community by mycorrhizal and non-mycorrhizal Gmelina arborea, an exotic tree, grown in a microcosm experiment.

Author

Arsene Sanon, Pascal Martin, Jean Thioulouse, Christian Plenchette, Rodolphe Spichiger, Michel Lepage, and Robin Duponnois

Abstract

Gmelina arborea Roxb. (Gmelina, Yemane) is a fast growing tree, native from India and considered as a potentially invasive woody plant in West Africa. Mycorrhizal inoculation of seedlings with Glomus intraradices was performed to study (1) the effect on the growth of G. arborea, (2) the impact on the catabolic diversity of soil microbial communities and (3) the influence on the structure of herbaceous plant species communities in microcosms. Treatments consisted of control plants, pre-planting fertilizer application and arbuscular mycorrhizal (AM) inoculation. After 4 months’ culture in autoclaved soil, G. arborea seedlings were either harvested for growth measurement or transferred into containers filled with the same soil but not sterilized. Other containers were kept without G. arborea seedlings. After 12 months’ further culture, effects of fertilizer amendment and AM inoculation on the growth of G. arborea seedlings were recorded. AM colonization was significantly and positively correlated with plant diversity. The substrate-induced respiration response to carboxylic acids was significantly higher in the absence of G. arborea and in the presence of G. intraradices as compared to the other treatments. The influence of AM symbiosis on plant coexistence and on allelopathic processes of invasive plants are discussed. [ABSTRACT FROM AUTHOR]

Published
2006

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