{"id":219,"date":"2013-03-27T10:46:30","date_gmt":"2013-03-27T10:46:30","guid":{"rendered":"https:\/\/mycor.iam.inrae.fr\/IAM\/?page_id=219"},"modified":"2026-03-23T10:24:24","modified_gmt":"2026-03-23T10:24:24","slug":"redox-team","status":"publish","type":"page","link":"https:\/\/mycor.iam.inrae.fr\/IAM\/?page_id=219","title":{"rendered":"Ecogenomics of interactions team"},"content":{"rendered":"

Team leader<\/strong>: Marc Bu\u00e9e<\/p>\n

The \u2018Ecogenomics of Interactions\u2019 Lab is one of the three teams of the \u2018Tree-Microbe Interactions\u2019 Department<\/strong>. Our group is conducting research on the biology and ecology of tree-associated microorganisms in forest ecosystems.<\/p>\n

Our group seeks to explore and understand the network of genes, proteins, metabolites, and environmental signals that lead to the complex ectomycorrhizal symbiosis in forest trees. We are investigating the role of mycorrhizal and saprophytic fungi in organic matter degradation and necromass turn-over. We are also investigating the molecular interactions between foliar rust and poplar<\/strong> (Transverse project<\/strong> with the Ecology and Redox teams<\/a>). Interactions between rhizospheric bacteria and ectomycorrhizal mycelium, bacteria\/bacteria are studied to assess the mechanisms involved and their role in nutrient cycling in forest ecosystems (e.g. mineral weathering) and tree nutrition. Several research projects are dealing with the ecology of populations and communities of ectomycorrhizal fungi.<\/p>\n

Our research initiative aimed to decipher the complex tree-fungus-bacteria systems engages disciplines across the laboratory. In particular, it draws on programs in comparative and functional genomics, biochemistry, bioinformatics, environmental microbiology and ecology.<\/p>\n

Our approach relies upon the most recent genomics and metagenomics techniques and focuses on black cottonwood, Populus trichocarpa<\/em>, the ectomycorrhizal basidiomycete Laccaria bicolor<\/em>, and the (mycor)rhizospheric bacteria such as Pseudomonas<\/em>, Collimonas<\/em> and Caballeronia<\/em> as the reference organisms.<\/p>\n

Harnessing the capabilities of microbial systems by understanding interactions at genomic, physiological, organism, and community levels will lead to better sustainable forest ecosystems.<\/p>\n

Projet de recherche (french) – \u00e9quipe \u00ab Ecog\u00e9nomique des Interactions \u00bb <\/strong><\/p>\n

Les arbres sont confront\u00e9s \u00e0 des contraintes et des perturbations multiples (climatiques, anthropiques, biologiques) qui les conduisent \u00e0 s\u2019adapter i) \u00e0 une faible biodisponibilit\u00e9 des nutriments, ii) \u00e0 un acc\u00e8s limit\u00e9 \u00e0 l’eau et iii) aux agressions r\u00e9p\u00e9t\u00e9es et croissantes d\u2019agents pathog\u00e8nes. Au cours de l\u2019\u00e9volution, les arbres ont d\u00e9velopp\u00e9 des partenariats privil\u00e9gi\u00e9s avec les communaut\u00e9s microbiennes de leur environnement, en enrichissant leurs microbiotes d\u2019esp\u00e8ces facilitant leur adaptation aux contraintes du milieu. Dans les for\u00eats temp\u00e9r\u00e9es et bor\u00e9ales, c\u2019est le cas de la symbiose ectomycorhizienne (ECM), qui constitue une remarquable illustration de ce partenariat \u00e9volutif entre les arbres et des champignons biotrophes mutualistes. Par ailleurs, le voisinage du syst\u00e8me racinaire de l’arbre est aussi enrichi par d\u2019autres assemblages microbiens complexes (bact\u00e9ries, champignons) qui participent \u00e9galement \u00e0 l’acc\u00e8s aux ressources nutritives contenues dans les diff\u00e9rentes strates, organiques et min\u00e9rales, du sol. Enfin, d\u2019autres champignons biotrophes, comme les endophytes, mais aussi certaines esp\u00e8ces pathog\u00e8nes pour l\u2019h\u00f4te, se sont perfectionn\u00e9s pour exploiter les ressources de l\u2019arbre sans se faire d\u00e9tecter, afin de maintenir une interaction suffisamment durable.<\/p>\n

C\u2019est dans ce contexte que l\u2019\u00e9quipe \u00ab Ecog\u00e9nomique des Interactions \u00bb \u00e9tudie les m\u00e9canismes mol\u00e9culaires contr\u00f4lant les interactions biotiques et abiotiques de l\u2019arbre et de son cort\u00e8ge microbien avec leur environnement (microbiote fongique et bact\u00e9rien).<\/strong> Aujourd\u2019hui, les recherches de l\u2019\u00e9quipe s\u2019inscrivent plus que jamais dans de nouveaux d\u00e9fis soci\u00e9taux visant \u00e0 accompagner la transition des \u00e9cosyst\u00e8mes forestiers en vue de leur adaptation aux climats futurs, de leur persistance face aux perturbations anthropiques de leur habitat (intensification des modes de gestion), et de leur contribution \u00e0 l\u2019att\u00e9nuation des changements climatiques.<\/p>\n

Ces derni\u00e8res ann\u00e9es, la vision prospective que nous avions d\u00e9j\u00e0 sur l\u2019importance du microbiote dans la croissance et la sant\u00e9 des arbres, nous oblige \u00e0 aller au-del\u00e0 de l\u2019analyse descriptive des g\u00e9nomes, des esp\u00e8ces et des communaut\u00e9s, et \u00e0 progresser dans la compr\u00e9hension des processus mol\u00e9culaires et \u00e9cologiques qui sous-tendent l\u2019adaptation des arbres et des communaut\u00e9s microbiennes associ\u00e9es aux contraintes anthropiques et climatiques.<\/p>\n

Le programme scientifique que nous proposons vise i) \u00e0 poursuivre l\u2019acquisition et l\u2019analyse de nouvelles ressources g\u00e9nomiques afin de compl\u00e9ter notre connaissance de l\u2019organisation et de l\u2019\u00e9volution des g\u00e9nomes et de leur expression pour identifier des indicateurs de traits adaptatifs et\/ou \u00e9volutifs des esp\u00e8ces (axe 1)<\/strong> ; ii) \u00e0 d\u00e9chiffrer les m\u00e9canismes mol\u00e9culaires qui r\u00e9gissent le continuum des interactions entre le sol, les bact\u00e9ries, les champignons et les arbres, en consid\u00e9rant diff\u00e9rentes interfaces de l\u2019arbre telles que l\u2019endosph\u00e8re, la rhizosph\u00e8re et la phyllosph\u00e8re (axe 2)<\/strong> et iii) \u00e0 am\u00e9liorer notre compr\u00e9hension des interactions fonctionnelles entre les arbres et les communaut\u00e9s microbiennes foresti\u00e8res, \u00e0 l\u2019\u00e9chelle de l\u2019\u00e9cosyst\u00e8me (axe 3)<\/strong>. Le s\u00e9quen\u00e7age \u00e0 grande \u00e9chelle des g\u00e9nomes de champignons et de bact\u00e9ries permet aussi de constituer une ressource fondamentale pour l\u2019\u00e9tude de l’\u00e9volution des interactions plantes-microbes et, plus largement, la r\u00e9gulation des m\u00e9canismes mol\u00e9culaires du microbiote forestier. Coupl\u00e9es \u00e0 des approches m\u00e9ta-omiques ou de g\u00e9n\u00e9tique microbienne, ces ressources g\u00e9nomiques nous permettent \u00e9galement de comprendre comment certaines composantes des communaut\u00e9s microbiennes, dialoguent avec l\u2019arbre, contribuent \u00e0 la sant\u00e9 de l\u2019h\u00f4te et acc\u00e8dent aux nutriments pi\u00e9g\u00e9s dans les min\u00e9raux du sol ou la mati\u00e8re organique en d\u00e9composition ; et en retour comment l\u2019arbre dialogue et fonctionne avec son microbiote.<\/p>\n

Contact us:<\/em><\/strong><\/span> \"Contact\"<\/a><\/p>\n

\n","protected":false},"excerpt":{"rendered":"

Team leader: Marc Bu\u00e9e The \u2018Ecogenomics of Interactions\u2019 Lab is one of the three teams of the \u2018Tree-Microbe Interactions\u2019 Department. Our group is conducting research on the biology and ecology of tree-associated microorganisms in forest ecosystems. Our group seeks to … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":215,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-219","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/mycor.iam.inrae.fr\/IAM\/index.php?rest_route=\/wp\/v2\/pages\/219","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mycor.iam.inrae.fr\/IAM\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/mycor.iam.inrae.fr\/IAM\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/mycor.iam.inrae.fr\/IAM\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/mycor.iam.inrae.fr\/IAM\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=219"}],"version-history":[{"count":5,"href":"https:\/\/mycor.iam.inrae.fr\/IAM\/index.php?rest_route=\/wp\/v2\/pages\/219\/revisions"}],"predecessor-version":[{"id":13303,"href":"https:\/\/mycor.iam.inrae.fr\/IAM\/index.php?rest_route=\/wp\/v2\/pages\/219\/revisions\/13303"}],"up":[{"embeddable":true,"href":"https:\/\/mycor.iam.inrae.fr\/IAM\/index.php?rest_route=\/wp\/v2\/pages\/215"}],"wp:attachment":[{"href":"https:\/\/mycor.iam.inrae.fr\/IAM\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=219"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}