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The resilience of perennial grasses under two climate scenarios is correlated with carbohydrate metabolism in meristems

hal.structure.identifierCentre d’Ecologie Fonctionnelle et Evolutive [CEFE]
dc.contributor.authorVOLAIRE, Florence
hal.structure.identifierEcophysiologie Végétale, Agronomie et Nutritions NCS [EVA]
dc.contributor.authorMORVAN-BERTRAND, Annette
hal.structure.identifierEcophysiologie Végétale, Agronomie et Nutritions NCS [EVA]
dc.contributor.authorPRUD’HOMME, Marie-Pascale
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorBENOT, Marie-Lise
hal.structure.identifierUnité Mixte de Recherche sur l'Ecosystème Prairial - UMR [UREP]
hal.structure.identifierCNR Institute of Ecosystem Study [ISE]
dc.contributor.authorAUGUSTI, Angela
hal.structure.identifierUnité Mixte de Recherche sur l'Ecosystème Prairial - UMR [UREP]
dc.contributor.authorZWICKE, Marine
hal.structure.identifierCentre National de la Recherche Scientifique [CNRS]
dc.contributor.authorROY, Jacques
hal.structure.identifierÉcotron Européen de Montpellier
dc.contributor.authorLANDAIS, Damien
hal.structure.identifierUnité Mixte de Recherche sur l'Ecosystème Prairial - UMR [UREP]
dc.contributor.authorPICON-COCHARD, Catherine
dc.date.issued2020-01-01
dc.identifier.issn0022-0957
dc.description.abstractEnExtreme climatic events (ECEs) such as droughts and heat waves affect ecosystem functioning and species turnover. This study investigated the effect of elevated CO2 on species' resilience to ECEs. Monoliths of intact soil and their plant communities from an upland grassland were exposed to 2050 climate scenarios with or without an ECE under ambient (390 ppm) or elevated (520 ppm) CO2 . Ecophysiological traits of two perennial grasses (Dactylis glomerate and Holcus lanatus) were measured before, during, and after ECE. At similar soil water content, leaf elongation was greater under elevated CO2 for both species. The resilience of D. glomerate increased under enhanced CO2 (+60%) whereas H. lanatus mostly died during ECE. D. glomerate accumulated 30% more fructans, which were more highly polymerized, and 4-fold less sucrose than H. lanatus. The fructan concentration in leaf meristems was significantly increased under elevated CO2. Their relative abundance changed during the ECE, resulting in a more polymerized assemblage in H. lanatus and a more depolymerized assemblage in D. glomerate. The ratio of low degree of polymerization fructans to sucrose in leaf meristems was the best predictor of resilience across species. This study underlines the role of carbohydrate metabolism and the species-dependent effect of elevated CO2 on the resilience of grasses to ECE.
dc.description.sponsorshipANAEE-Services - ANR-11-INBS-0001
dc.language.isoen
dc.publisherOxford University Press (OUP)
dc.rights.urihttp://creativecommons.org/licenses/by-nc/
dc.subject.enDactylis glomerata
dc.subject.enElevated CO2
dc.subject.enExtreme climatic event
dc.subject.enFructans
dc.subject.enHolcus lanatus
dc.subject.enResilience
dc.subject.enSucrose
dc.title.enThe resilience of perennial grasses under two climate scenarios is correlated with carbohydrate metabolism in meristems
dc.typeArticle de revue
dc.identifier.doi10.1093/jxb/erz424
dc.subject.halSciences du Vivant [q-bio]/Ecologie, Environnement
bordeaux.journalJournal of Experimental Botany
bordeaux.page370-385
bordeaux.volume71
bordeaux.issue1
bordeaux.peerReviewedoui
hal.identifierhal-02550869
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02550869v1
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