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Minimum leaf conductance during drought: unravelling its variability and impact on plant survival

hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorBURLETT, Régis
hal.structure.identifierBotanique et Modélisation de l'Architecture des Plantes et des Végétations [UMR AMAP]
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorTRUEBA, Santiago
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorBOUTEILLER, Xavier
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorFORGET, Guillaume
hal.structure.identifierInstituto de Recursos Naturales y Agrobiología de Sevilla [IRNAS]
dc.contributor.authorTORRES-RUIZ, José
hal.structure.identifierUnité expérimentale Forêt Pierroton [UEFP]
dc.contributor.authorMARTIN-STPAUL, Nicolas
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorPARISE, Camille
hal.structure.identifierLaboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant [PIAF]
dc.contributor.authorCOCHARD, Hervé
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorDELZON, Sylvain
dc.date.issued2025-03-10
dc.identifier.issn0028-646X
dc.description.abstractEnLeaf water loss after stomatal closure is key to understanding the effects of prolonged drought on vegetation. It is therefore important to accurately quantify such water losses to improve physiology-based models of drought-induced plant mortality.<p>We measured water loss of detached leaves continuously during dehydration in nine woody angiosperm species. We computed minimum leaf conductance (g min ) at different water potential thresholds along a sequence of physiological function losses, spanning from turgor loss point to hydraulic failure. A mechanistic model evaluated the impact of different g min estimations on the time to hydraulic failure (THF).</p><p>Residual conductance is not steady and decreases continuously at varying rates across species during the entire dehydration process, even after correcting for leaf shrinkage and vapor pressure deficit shifts. Different estimations of g min had a significant impact on the THF predicted by the model, especially for drought-resistant species.</p><p>We demonstrate that residual conductance is variable during dehydration, and thus, it is important to use physiological or water status boundaries for its estimation in order to determine distinct g min values of water loss. We describe an accurate, repeatable and open-source methodology to estimate g min . Such methodology could enhance models of plant mortality under drought</p>
dc.description.sponsorshipCOntinental To coastal Ecosystems: evolution, adaptability and governance - ANR-10-LABX-0045
dc.language.isoen
dc.publisherWiley
dc.rights.urihttp://creativecommons.org/licenses/by-nc/
dc.subject.enCuticular conductance
dc.subject.enDrought stress
dc.subject.enRelative water content
dc.subject.enStomatal closure
dc.subject.enTurgor loss point
dc.subject.enWater potential
dc.title.enMinimum leaf conductance during drought: unravelling its variability and impact on plant survival
dc.typeArticle de revue
dc.identifier.doi10.1111/nph.70052
dc.subject.halSciences de l'environnement
bordeaux.journalNew Phytologist
bordeaux.peerReviewedoui
hal.identifierhal-04986793
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04986793v1
bordeaux.COinSctx_ver=Z39.88-2004&amp;rft_val_fmt=info:ofi/fmt:kev:mtx:journal&amp;rft.jtitle=New%20Phytologist&amp;rft.date=2025-03-10&amp;rft.eissn=0028-646X&amp;rft.issn=0028-646X&amp;rft.au=BURLETT,%20R%C3%A9gis&amp;TRUEBA,%20Santiago&amp;BOUTEILLER,%20Xavier&amp;FORGET,%20Guillaume&amp;TORRES-RUIZ,%20Jos%C3%A9&amp;rft.genre=article


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