Fellfields of the Kerguelen Islands harbour specific soil microbiomes and rhizomicrobiomes of an endemic plant facing necrosis
International audience Polar regions are characterized by rocky terrains with sparse vegetation and oligotrophic soils, i.e. "fellfields". In such ecosystems, microbial communities should be essential for soil-plant functioning but their diversity is poorly explored. The sub-Antarctic Kerg...
Published in: | Frontiers in Soil Science |
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Main Authors: | , , , , , |
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2022
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Online Access: | https://hal.science/hal-03843656 https://hal.science/hal-03843656/document https://hal.science/hal-03843656/file/Marchand_et_al_2022.pdf https://doi.org/10.3389/fsoil.2022.995716 |
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ftunivrennes1hal:oai:HAL:hal-03843656v1 |
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openpolar |
institution |
Open Polar |
collection |
Université de Rennes 1: Publications scientifiques (HAL) |
op_collection_id |
ftunivrennes1hal |
language |
English |
topic |
sub-Antarctic bacteria fungi Lyallia kerguelensis cushion plant dieback [SDV.EE]Life Sciences [q-bio]/Ecology environment |
spellingShingle |
sub-Antarctic bacteria fungi Lyallia kerguelensis cushion plant dieback [SDV.EE]Life Sciences [q-bio]/Ecology environment Marchand, Lorène, Julia Hennion, Françoise Tarayre, Michèle Martin, Marie-Claire Martins, Benoit, Renaud Monard, Cécile Fellfields of the Kerguelen Islands harbour specific soil microbiomes and rhizomicrobiomes of an endemic plant facing necrosis |
topic_facet |
sub-Antarctic bacteria fungi Lyallia kerguelensis cushion plant dieback [SDV.EE]Life Sciences [q-bio]/Ecology environment |
description |
International audience Polar regions are characterized by rocky terrains with sparse vegetation and oligotrophic soils, i.e. "fellfields". In such ecosystems, microbial communities should be essential for soil-plant functioning but their diversity is poorly explored. The sub-Antarctic Kerguelen Islands fellfields are characterized by an endemic long-lived cushion plant, Lyallia kerguelensis which rhizosphere may be a shelter for microbes in this harsh environment. Cushions are affected by necrosis and we expect the rhizomicrobiome composition to be related to plant necrosis. We analysed bacterial and fungal communities in bulk-and rhizospheric soils from L. kerguelensis in five different fellfields across the Kerguelen Islands using 16S rRNA and ITS1 metabarcoding. We found that soil microbial communities were composed of both restricted and cosmopolitan taxa. While all sites were dominated by the same bacterial taxa (Chloroflexi, Actinobacteria, a-Proteobacteria and Acidobacteria), the relative abundance of the main fungal phyla (Ascomycota, Basidiomycota, Mortierellomycota and Rozellomycota) highly differed between sites. L. kerguelensis rhizomicrobiome was at least as diverse as the bulk soil, making the rhizosphere a possible reservoir of microbial diversity. It was composed of the same main bacterial phyla than detected in the bulk soil while the composition of the rhizosphere fungal communities was specific to each plant. No common microorganisms were identified regarding cushion necrosis extent across plants and sites, but several microbial putative functions were shared, suggesting a possible shift in soil functioning with cushion necrosis increase. Our study brings new information on the diversity and composition of the microbial communities of fellfield soils in a sub-Antarctic Island and the rhizomicrobiome of a characteristic endemic cushion plant. |
author2 |
Ecosystèmes, biodiversité, évolution Rennes (ECOBIO) Université de Rennes (UR)-Institut Ecologie et Environnement (INEE) Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS) This research was supported by the French Polar Institute (IPEV, project 1116) and CNRS IRP grant “AntarctPlantAdapt” (F. Hennion) and AO 2018 (OSUR, Université de Rennes1). L.J. Marchand was supported by a PhD grant from the Ministry of Research and Education (France). |
format |
Article in Journal/Newspaper |
author |
Marchand, Lorène, Julia Hennion, Françoise Tarayre, Michèle Martin, Marie-Claire Martins, Benoit, Renaud Monard, Cécile |
author_facet |
Marchand, Lorène, Julia Hennion, Françoise Tarayre, Michèle Martin, Marie-Claire Martins, Benoit, Renaud Monard, Cécile |
author_sort |
Marchand, Lorène, Julia |
title |
Fellfields of the Kerguelen Islands harbour specific soil microbiomes and rhizomicrobiomes of an endemic plant facing necrosis |
title_short |
Fellfields of the Kerguelen Islands harbour specific soil microbiomes and rhizomicrobiomes of an endemic plant facing necrosis |
title_full |
Fellfields of the Kerguelen Islands harbour specific soil microbiomes and rhizomicrobiomes of an endemic plant facing necrosis |
title_fullStr |
Fellfields of the Kerguelen Islands harbour specific soil microbiomes and rhizomicrobiomes of an endemic plant facing necrosis |
title_full_unstemmed |
Fellfields of the Kerguelen Islands harbour specific soil microbiomes and rhizomicrobiomes of an endemic plant facing necrosis |
title_sort |
fellfields of the kerguelen islands harbour specific soil microbiomes and rhizomicrobiomes of an endemic plant facing necrosis |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.science/hal-03843656 https://hal.science/hal-03843656/document https://hal.science/hal-03843656/file/Marchand_et_al_2022.pdf https://doi.org/10.3389/fsoil.2022.995716 |
genre |
Antarc* Antarctic Kerguelen Islands |
genre_facet |
Antarc* Antarctic Kerguelen Islands |
op_source |
ISSN: 2673-8619 Frontiers in Soil Science https://hal.science/hal-03843656 Frontiers in Soil Science, 2022, 2, pp.995716. ⟨10.3389/fsoil.2022.995716⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3389/fsoil.2022.995716 hal-03843656 https://hal.science/hal-03843656 https://hal.science/hal-03843656/document https://hal.science/hal-03843656/file/Marchand_et_al_2022.pdf doi:10.3389/fsoil.2022.995716 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.3389/fsoil.2022.995716 |
container_title |
Frontiers in Soil Science |
container_volume |
2 |
_version_ |
1781692187148288000 |
spelling |
ftunivrennes1hal:oai:HAL:hal-03843656v1 2023-11-05T03:36:55+01:00 Fellfields of the Kerguelen Islands harbour specific soil microbiomes and rhizomicrobiomes of an endemic plant facing necrosis Marchand, Lorène, Julia Hennion, Françoise Tarayre, Michèle Martin, Marie-Claire Martins, Benoit, Renaud Monard, Cécile Ecosystèmes, biodiversité, évolution Rennes (ECOBIO) Université de Rennes (UR)-Institut Ecologie et Environnement (INEE) Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS) This research was supported by the French Polar Institute (IPEV, project 1116) and CNRS IRP grant “AntarctPlantAdapt” (F. Hennion) and AO 2018 (OSUR, Université de Rennes1). L.J. Marchand was supported by a PhD grant from the Ministry of Research and Education (France). 2022-09-26 https://hal.science/hal-03843656 https://hal.science/hal-03843656/document https://hal.science/hal-03843656/file/Marchand_et_al_2022.pdf https://doi.org/10.3389/fsoil.2022.995716 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.3389/fsoil.2022.995716 hal-03843656 https://hal.science/hal-03843656 https://hal.science/hal-03843656/document https://hal.science/hal-03843656/file/Marchand_et_al_2022.pdf doi:10.3389/fsoil.2022.995716 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 2673-8619 Frontiers in Soil Science https://hal.science/hal-03843656 Frontiers in Soil Science, 2022, 2, pp.995716. ⟨10.3389/fsoil.2022.995716⟩ sub-Antarctic bacteria fungi Lyallia kerguelensis cushion plant dieback [SDV.EE]Life Sciences [q-bio]/Ecology environment info:eu-repo/semantics/article Journal articles 2022 ftunivrennes1hal https://doi.org/10.3389/fsoil.2022.995716 2023-10-10T22:45:36Z International audience Polar regions are characterized by rocky terrains with sparse vegetation and oligotrophic soils, i.e. "fellfields". In such ecosystems, microbial communities should be essential for soil-plant functioning but their diversity is poorly explored. The sub-Antarctic Kerguelen Islands fellfields are characterized by an endemic long-lived cushion plant, Lyallia kerguelensis which rhizosphere may be a shelter for microbes in this harsh environment. Cushions are affected by necrosis and we expect the rhizomicrobiome composition to be related to plant necrosis. We analysed bacterial and fungal communities in bulk-and rhizospheric soils from L. kerguelensis in five different fellfields across the Kerguelen Islands using 16S rRNA and ITS1 metabarcoding. We found that soil microbial communities were composed of both restricted and cosmopolitan taxa. While all sites were dominated by the same bacterial taxa (Chloroflexi, Actinobacteria, a-Proteobacteria and Acidobacteria), the relative abundance of the main fungal phyla (Ascomycota, Basidiomycota, Mortierellomycota and Rozellomycota) highly differed between sites. L. kerguelensis rhizomicrobiome was at least as diverse as the bulk soil, making the rhizosphere a possible reservoir of microbial diversity. It was composed of the same main bacterial phyla than detected in the bulk soil while the composition of the rhizosphere fungal communities was specific to each plant. No common microorganisms were identified regarding cushion necrosis extent across plants and sites, but several microbial putative functions were shared, suggesting a possible shift in soil functioning with cushion necrosis increase. Our study brings new information on the diversity and composition of the microbial communities of fellfield soils in a sub-Antarctic Island and the rhizomicrobiome of a characteristic endemic cushion plant. Article in Journal/Newspaper Antarc* Antarctic Kerguelen Islands Université de Rennes 1: Publications scientifiques (HAL) Frontiers in Soil Science 2 |