High intraspecific genome diversity in the model arbuscular mycorrhizal symbiont Rhizophagus irregularis

Autor: Christophe Roux, Jessica Noël, Philippe Charron, Steve Ndikumana, Camille St‐Onge, Nicolas Corradi, Francis Martin, Denis Beaudet, Manuela Krüger, Gokalp Yildirir, Emmanuelle Morin, John M Giorgi, Eric C. H. Chen, Igor V. Grigoriev, Timea Marton, Matthieu Hainaut, Jeanne Ropars, Bernard Henrissat
Přispěvatelé: University of Ottawa [Ottawa] (uOttawa), Interactions Arbres-Microorganismes (IAM), Université de Lorraine (UL)-Institut National de la Recherche Agronomique (INRA), Department of Energy / Joint Genome Institute (DOE), Los Alamos National Laboratory (LANL), Architecture et fonction des macromolécules biologiques (AFMB), Institut National de la Recherche Agronomique (INRA)-Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS), Department of Biological Sciences, King Abdulaziz University, Jeddah, Saudi Arabia, Laboratoire de Recherche en Sciences Végétales (LRSV), Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées, ANR-11-LABX-0002,ARBRE,Recherches Avancées sur l'Arbre et les Ecosytèmes Forestiers(2011), University of Ottawa [Ottawa], Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL), Centre National de la Recherche Scientifique (CNRS)-Aix Marseille Université (AMU)-Institut National de la Recherche Agronomique (INRA), Interactions Microbiennes dans la Rhizosphère et les Racines, 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), King Abdulaziz University, Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: New Phytologist
New Phytologist, Wiley, 2018, 220 (4), pp.1161-1171. ⟨10.1111/nph.14989⟩
New Phytologist, 2018, 220 (4), pp.1161-1171. ⟨10.1111/nph.14989⟩
ISSN: 0028-646X
1469-8137
DOI: 10.1111/nph.14989⟩
Popis: International audience; Arbuscular mycorrhizal fungi (AMF) are known to improve plant fitness through the establishment of mycorrhizal symbioses. Genetic and phenotypic variations among closely related AMF isolates can significantly affect plant growth, but the genomic changes underlying this variability are unclear. To address this issue, we improved the genome assembly and gene annotation of the model strain Rhizophagus irregularis DAOM197198, and compared its gene content with five isolates of R. irregularis sampled in the same field. All isolates harbor striking genome variations, with large numbers of isolate-specific genes, gene family expansions, and evidence of interisolate genetic exchange. The observed variability affects all gene ontology terms and PFAM protein domains, as well as putative mycorrhiza-induced small secreted effector-like proteins and other symbiosis differentially expressed genes. High variability is also found in active transposable elements. Overall, these findings indicate a substantial divergence in the functioning capacity of isolates harvested from the same field, and thus their genetic potential for adaptation to biotic and abiotic changes. Our data also provide a first glimpse into the genome diversity that resides within natural populations of these symbionts, and open avenues for future analyses of plant-AMF interactions that link AMF genome variation with plant phenotype and fitness.
Databáze: OpenAIRE
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