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

dc.rights.licenseopenen_US
hal.structure.identifierEcophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]
dc.contributor.authorDAYER, Silvina
dc.contributor.authorHERRERA, José 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, Régis
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
hal.structure.identifierEcophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]
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
dc.contributor.authorCOCHARD, Hervé
hal.structure.identifierEcophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV]
dc.contributor.authorGAMBETTA, Gregory
ORCID: 0000-0002-8838-5050
IDREF: 225449641
dc.date.accessioned2020-09-09T14:06:03Z
dc.date.available2020-09-09T14:06:03Z
dc.date.issued2020-07-06
dc.identifier.issn1460-2431en_US
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/11277
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.language.isoENen_US
dc.subjectEmbolism
dc.subjectGrapevine
dc.subjectStomata
dc.subjectTranspiration
dc.subjectTurgor loss point
dc.subject.enDrought
dc.titleThe sequence and thresholds of leaf hydraulic traits underlying grapevine varietal differences in drought tolerance.
dc.title.alternativeJ Exp Boten_US
dc.typeArticle de revueen_US
dc.identifier.doi10.1093/jxb/eraa186en_US
dc.subject.halSciences du Vivant [q-bio]/Biologie végétaleen_US
dc.identifier.pubmed32279077en_US
bordeaux.journalJournal of Experimental Botanyen_US
bordeaux.page4333-4344en_US
bordeaux.volume71en_US
bordeaux.hal.laboratoriesEcophysiologie et Génomique Fonctionnelle de la Vigne (EGFV) - UMR 1287en_US
bordeaux.issue14en_US
bordeaux.institutionBordeaux Sciences Agroen_US
bordeaux.institutionUniversité de Bordeauxen_US
bordeaux.peerReviewedouien_US
bordeaux.inpressnonen_US
bordeaux.import.sourcepubmed
hal.exportfalse
workflow.import.sourcepubmed
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