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Unpacking the point of no return under drought in poplar: insight from stem diameter variation

hal.structure.identifierLaboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant [PIAF]
dc.contributor.authorANDRIANTELOMANANA, Tsiky
hal.structure.identifierLaboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant [PIAF]
dc.contributor.authorAMÉGLIO, Thierry
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorDELZON, Sylvain
hal.structure.identifierLaboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant [PIAF]
dc.contributor.authorCOCHARD, Hervé
hal.structure.identifierLaboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant [PIAF]
dc.contributor.authorHERBETTE, Stéphane
dc.date.issued2024-02-26
dc.identifier.issn0028-646X
dc.description.abstractEnSummary A specific, robust threshold for drought‐induced tree mortality is needed to improve the prediction of forest dieback. Here, we tested the relevance of continuous measurements of stem diameter variations for identifying such a threshold, their relationship with hydraulic and cellular damage mechanisms, and the influence of growth conditions on these relationships. Poplar saplings were grown under well‐watered, water‐limited, or light‐limited conditions and then submitted to a drought followed by rewatering. Stem diameter was continuously measured to investigate two parameters: the percentage loss of diameter (PLD) and the percentage of diameter recovery (DR) following rewatering. Water potentials, stomatal conductance, embolism, and electrolyte leakage were also measured, and light microscopy allowed investigating cell collapse induced by drought. The water release observed through loss of diameter occurred throughout the drought, regardless of growth conditions. Poplars did not recover from drought when PLD reached a threshold and this differed according to growth conditions but remained linked to cell resistance to damage and collapse. Our findings shed new light on the mechanisms of drought‐induced tree mortality and indicate that PLD could be a relevant indicator of drought‐induced tree mortality, regardless of the growth conditions.
dc.language.isoen
dc.publisherWiley
dc.subject.enacclimation
dc.subject.endrought
dc.subject.enpoint of no return
dc.subject.enpoplarstem diameter
dc.subject.entree mortality
dc.title.enUnpacking the point of no return under drought in poplar: insight from stem diameter variation
dc.typeArticle de revue
dc.identifier.doi10.1111/nph.19615
dc.subject.halSciences du Vivant [q-bio]
bordeaux.journalNew Phytologist
bordeaux.page466-478
bordeaux.volume242
bordeaux.issue2
bordeaux.peerReviewedoui
hal.identifierhal-04552067
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04552067v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=New%20Phytologist&rft.date=2024-02-26&rft.volume=242&rft.issue=2&rft.spage=466-478&rft.epage=466-478&rft.eissn=0028-646X&rft.issn=0028-646X&rft.au=ANDRIANTELOMANANA,%20Tsiky&AM%C3%89GLIO,%20Thierry&DELZON,%20Sylvain&COCHARD,%20Herv%C3%A9&HERBETTE,%20St%C3%A9phane&rft.genre=article


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