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The sequence and thresholds of leaf hydraulic traits underlying grapevine varietal differences in drought tolerance

hal.structure.identifierEcophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]
dc.contributor.authorDAYER, Silvina
hal.structure.identifierUniversität für Bodenkultur Wien = University of Natural Resources and Life [Vienne, Autriche] [BOKU]
dc.contributor.authorHERRERA, Jose Carlos
hal.structure.identifierEcophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]
dc.contributor.authorDAI, Zhanwu
IDREF: 22822473X
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorBURLETT, Regis
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorLAMARQUE, Laurent
IDREF: 228231558
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorDELZON, Sylvain
hal.structure.identifierSanté et agroécologie du vignoble [UMR SAVE]
dc.contributor.authorBORTOLAMI, Giovanni
hal.structure.identifierLaboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant [PIAF]
dc.contributor.authorCOCHARD, Herve
hal.structure.identifierEcophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]
dc.contributor.authorGAMBETTA, Gregory
dc.date.issued2020-07-06
dc.identifier.issn0022-0957
dc.description.abstractEnAdapting agriculture to climate change is driving the need for the selection and breeding of drought-tolerant crops. The aim of this study was to identify key drought tolerance traits and determine the sequence of their water potential thresholds across three grapevine cultivars with contrasting water use behaviors, Grenache, Syrah, and Semillon. We quantified differences in water use between cultivars and combined this with the determination of other leaf-level traits (e.g. leaf turgor loss point, π TLP), leaf vulnerability to embolism (P50), and the hydraulic safety margin (HSM P50). Semillon exhibited the highest maximum transpiration (Emax), and lowest sensitivity of canopy stomatal conductance (Gc) to vapor pressure deficit (VPD), followed by Syrah and Grenache. Increasing Emax was correlated with more negative water potential at which stomata close (Pgs90), π TLP, and P50, suggesting that increasing water use is associated with hydraulic traits allowing gas exchange under more negative water potentials. Nevertheless, all the cultivars closed their stomata prior to leaf embolism formation. Modeling simulations demonstrated that despite a narrower HSM, Grenache takes longer to reach thresholds of hydraulic failure due to its conservative water use. This study demonstrates that the relationships between leaf hydraulic traits are complex and interactive, stressing the importance of integrating multiple traits in characterizing drought tolerance.
dc.description.sponsorshipPlateforme d'Innovation " Forêt-Bois-Fibre-Biomasse du Futur " - ANR-10-EQPX-0016
dc.description.sponsorshipInitiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003
dc.language.isoen
dc.publisherOxford University Press (OUP)
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.subject.enDrought
dc.subject.enEmbolism
dc.subject.enGrapevine
dc.subject.enStomata
dc.subject.enTranspiration
dc.subject.enTurgor loss point
dc.title.enThe sequence and thresholds of leaf hydraulic traits underlying grapevine varietal differences in drought tolerance
dc.typeArticle de revue
dc.identifier.doi10.1093/jxb/eraa186
dc.subject.halSciences de l'environnement
dc.subject.halSciences du Vivant [q-bio]/Biodiversité
bordeaux.journalJournal of Experimental Botany
bordeaux.page4333-4344
bordeaux.volume71
bordeaux.issue14
bordeaux.peerReviewedoui
hal.identifierhal-02914772
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02914772v1
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