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Hydraulic plasticity and water use regulation act to maintain the hydraulic safety margins of Mediterranean trees in rainfall exclusion experiments

hal.structure.identifierEcologie des Forêts Méditerranéennes [URFM]
dc.contributor.authorMORENO, Myriam
hal.structure.identifierCentre d’Ecologie Fonctionnelle et Evolutive [CEFE]
dc.contributor.authorLIMOUSIN, Jean‐marc
hal.structure.identifierEcologie des Forêts Méditerranéennes [URFM]
dc.contributor.authorSIMIONI, Guillaume
hal.structure.identifierLaboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant [PIAF]
dc.contributor.authorBADEL, Eric
hal.structure.identifierUniversidad Politécnica de Madrid [UPM]
dc.contributor.authorRODRÍGUEZ-CALCERRADA, Jesus
hal.structure.identifierLaboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant [PIAF]
dc.contributor.authorCOCHARD, Hervé
hal.structure.identifierInstituto de Recursos Naturales y Agrobiología de Sevilla [IRNAS]
dc.contributor.authorTORRES-RUIZ, José
hal.structure.identifierEcologie des Forêts Méditerranéennes [URFM]
dc.contributor.authorDUPUY, Jean‐luc
hal.structure.identifierEcologie des Forêts Méditerranéennes [URFM]
dc.contributor.authorRUFFAULT, Julien
hal.structure.identifierInstitut méditerranéen de biodiversité et d'écologie marine et continentale [IMBE]
dc.contributor.authorORMEÑO, Elena
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorDELZON, Sylvain
hal.structure.identifierInstitut méditerranéen de biodiversité et d'écologie marine et continentale [IMBE]
dc.contributor.authorFERNANDEZ, Catherine
hal.structure.identifierCentre d’Ecologie Fonctionnelle et Evolutive [CEFE]
dc.contributor.authorOURCIVAL, Jean-Marc
hal.structure.identifierEcologie des Forêts Méditerranéennes [URFM]
dc.contributor.authorMARTIN-STPAUL, Nicolas
dc.date.issued2024-07-30
dc.identifier.issn0140-7791
dc.description.abstractEnHydraulic failure due to xylem embolism has been identified as one of the main mechanisms involved in drought‐induced forest decline. Trees vulnerability to hydraulic failure depends on their hydraulic safety margin (HSM). While it has been shown that HSM globally converges between tree species and biomes, there is still limited knowledge regarding how HSM can adjust locally to varying drought conditions within species. In this study, we relied on three long‐term partial rainfall exclusion experiments to investigate the plasticity of hydraulic traits and HSM for three Mediterranean tree species ( Quercus ilex L., Quercus pubescens Willd ., and Pinus halepensis Mill .). For all species, a homeostasis of HSM in response to rainfall reduction was found, achieved through different mechanisms. For Q. ilex , the convergence in HSM is attributed to the adjustment of both the turgor loss point (Ψtlp) and the water potential at which 50% of xylem conductivity is lost due to embolism (P50). In contrast, the maintenance of HSM for P. halepensis and Q. pubescens is related to its isohydric behavior for the first and leaf area adjustment for the latter. It remains to be seen whether this HSM homeostasis can be generalized and if it will be sufficient to withstand extreme droughts expected in the Mediterranean region.
dc.language.isoen
dc.publisherWiley
dc.subject.encuticular conductance
dc.subject.enevergreen and deciduous trees
dc.subject.enhydraulic adjustment
dc.subject.enhydraulic failure
dc.subject.enphenotypic plasticity
dc.subject.enstomatal control
dc.subject.enthroughfall exclusion
dc.subject.enturgo
dc.title.enHydraulic plasticity and water use regulation act to maintain the hydraulic safety margins of Mediterranean trees in rainfall exclusion experiments
dc.typeArticle de revue
dc.identifier.doi10.1111/pce.15066
dc.subject.halSciences du Vivant [q-bio]/Biologie végétale/Amélioration des plantes
bordeaux.journalPlant, Cell and Environment
bordeaux.page4741-4753
bordeaux.volume47
bordeaux.issue12
bordeaux.peerReviewedoui
hal.identifierhal-04681185
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04681185v1
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