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Plant intraspecific variation modulates nutrient cycling through its below ground rhizospheric microbiome

hal.structure.identifierInstituto de Ciencias Agrarias-CSIC [ICA-CSIC]
dc.contributor.authorPÉREZ‐IZQUIERDO, Leticia
hal.structure.identifierInstituto de Ciencias Agrarias-CSIC [ICA-CSIC]
dc.contributor.authorZABAL‐AGUIRRE, Mario
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorGONZÁLEZ‐MARTÍNEZ, Santiago
hal.structure.identifierInteractions Arbres-Microorganismes [IAM]
dc.contributor.authorBUÉE, Marc
hal.structure.identifierUniversitat de València [UV]
hal.structure.identifierCentro de Investigaciones sobre Desertificacion [CIDE]
hal.structure.identifierConsejo Superior de Investigaciones Científicas
dc.contributor.authorVERDÚ, Miguel
hal.structure.identifierInstituto de Ciencias Agrarias-CSIC [ICA-CSIC]
dc.contributor.authorRINCÓN, Ana
hal.structure.identifierUniversitat de València [UV]
hal.structure.identifierCentro de Investigaciones sobre Desertificacion [CIDE]
hal.structure.identifierConsejo Superior de Investigaciones Científicas
dc.contributor.authorGOBERNA, Marta
dc.date.issued2019
dc.identifier.issn0022-0477
dc.description.abstractEnPlant genetic variation, through its phenotypic display, can determine the composition of below ground microbial communities. Variation within a species is increasingly acknowledged to have substantial ecological consequences, particularly through trophic cascades. We hypothesized that the intraspecific genotypic variation of the tree host might impact the phylogenetic composition of its rhizospheric microbial communities, by favouring particular clades, that might be further reflected in ecosystem process rates. We tested whether the intraspecific genotypic variation of Pinus pinaster modulates nutrient cycling by determining the phylogenetic structure of its symbiotic ectomycorrhizal fungi and rhizospheric bacteria. We sequenced fungal and bacterial molecular markers and reconstructed phylogenies in the rhizosphere of P. pinaster trees belonging to three genotypic variants (Mediterranean, Atlantic, African) in three 45-year-old common garden experiments, and measured seven soil enzymatic activities. Local effects, based on differences in elevation and soil conditions across sites, were strong predictors of the ectomycorrhizal and bacterial communities thriving in tree's rhizosphere. Across-site variation also explained differences in phosphorus cycling. We detected, however, a significant effect of the plant genotype on the phylogenetic structure of the root-associated microbiota that was consistent across sites. The most productive Mediterranean plant genotype sheltered the most distinct root microbiome, with the dominant Basidiomycetes and Proteobacteria having a strong influence on the phylogenetic microbial community structure and associating with an enhanced hydrolysis of celluloses, hemicelluloses and chitin. Beneath the less productive Atlantic genotype, the less abundant Ascomycetes and up to thirteen bacterial phyla shaped the phylogenetic microbial structure, and predicted the rates of peptidase. Ectomycorrhizal fungi explained the activity of cellulases and protease, and bacteria that of hemicellulases and chitinase, suggesting functional complementarity. Synthesis. This is the first report using three-replicated long-term common gardens in mature forests to disentangle plant genotype- and site-specific drivers of the rhizospheric microbiome and its enzymatic potential. We concluded that intraspecific variation in primary producers leaves a phylogenetic signature in mutualists and decomposers that further modulate key steps in carbon and nitrogen cycles. These results emphasize the ecological relevance of plant intraspecific diversity in determining essential plant-soil feedbacks that control ecosystem productivity and performance.
dc.language.isoen
dc.publisherWiley
dc.subjectvariation intraspécifique
dc.subjectcycle biogéochimique
dc.subjectactivité microbiologique du sol
dc.subjectmicrobiome
dc.subjectpinus pinaster
dc.subjectchampignon ectomycorhizien
dc.subjectbactérie rhizosphérique
dc.subjectbasidiomycete
dc.subjectproteobacteria
dc.subjectvariabilité génétique
dc.subjectarbre
dc.subjectrhizosphère
dc.subject.enecosystem functioning
dc.subject.enectomycorrhizal fungi
dc.subject.ennutrient cycling
dc.subject.enphylogenetic community structure
dc.subject.enplant genotype
dc.subject.ensoil bacteria
dc.subject.enbiogeochemical cycle
dc.subject.enmaritime pine
dc.subject.enrhizospheric bacteria
dc.subject.engenetic variability
dc.title.enPlant intraspecific variation modulates nutrient cycling through its below ground rhizospheric microbiome
dc.typeArticle de revue
dc.identifier.doi10.1111/1365-2745.13202
dc.subject.halSciences de l'environnement/Biodiversité et Ecologie
bordeaux.journalJournal of Ecology
bordeaux.page1594-1605
bordeaux.volume107
bordeaux.issue4
bordeaux.peerReviewedoui
hal.identifierhal-02181068
hal.version1
hal.popularnon
hal.audienceNon spécifiée
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02181068v1
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