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Persistent decay of fresh xylem hydraulic conductivity varies with pressure gradient and marks plant responses to injury

hal.structure.identifierUniversity College of London [London] [UCL]
dc.contributor.authorBONETTI, Sara
hal.structure.identifierEidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] [ETH Zürich]
dc.contributor.authorBREITENSTEIN, Daniel
hal.structure.identifierEidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] [ETH Zürich]
dc.contributor.authorFATICHI, Simone
hal.structure.identifierInteractions Sol Plante Atmosphère [UMR ISPA]
dc.contributor.authorDOMEC, Jean‐christophe
hal.structure.identifierEidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] [ETH Zürich]
dc.contributor.authorOR, Dani
dc.date.accessioned2024-04-08T11:52:08Z
dc.date.available2024-04-08T11:52:08Z
dc.date.issued2021-02
dc.identifier.issn0140-7791
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/195468
dc.description.abstractEnDefining plant hydraulic traits is central to the quantification of ecohydrological processes ranging from land-atmosphere interactions, to tree mortality and water-carbon budgets. A key plant trait is the xylem specific hydraulic conductivity (K-x), that describes the plant's vascular system capacity to transport water. While xylem's vessels and tracheids are dead upon maturity, the xylem is neither inert nor deadwood, various components of the sapwood and surrounding tissue remaining alive and functional. Moreover, the established definition of K-x assumes linear relations between water flux and pressure gradient by tacitly considering the xylem as a "passive conduit". Here, we re-examine this notion of an inert xylem by systematically characterizing xylem flow in several woody plants using K-x measurements under constant and cyclic pressure gradients. Results show a temporal and pressure gradient dependence of K-x. Additionally, microscopic features in "living branches" are irreversibly modified upon drying of the xylem, thus differentiating the macroscopic definition of K-x for living and dead xylem. The findings highlight the picture of the xylem as a complex and delicate conductive system whose hydraulic behaviour transcends a passive gradient-based flow. The study sheds new light on xylem conceptualization, conductivity measurement protocols, in situ long-distance water transport and ecosystem modelling.
dc.language.isoen
dc.publisherWiley
dc.subject.en:plant hydraulic traits
dc.subject.enplant vascular system
dc.subject.ensapflow
dc.subject.enxylem conductivity measurements
dc.title.enPersistent decay of fresh xylem hydraulic conductivity varies with pressure gradient and marks plant responses to injury
dc.typeArticle de revue
dc.identifier.doi10.1111/pce.13893
dc.subject.halSciences de l'environnement
bordeaux.journalPlant, Cell and Environment
bordeaux.page371-386
bordeaux.volume44
bordeaux.hal.laboratoriesInteractions Soil Plant Atmosphere (ISPA) - UMR 1391*
bordeaux.issue2
bordeaux.institutionBordeaux Sciences Agro
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-03173767
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03173767v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Plant,%20Cell%20and%20Environment&rft.date=2021-02&rft.volume=44&rft.issue=2&rft.spage=371-386&rft.epage=371-386&rft.eissn=0140-7791&rft.issn=0140-7791&rft.au=BONETTI,%20Sara&BREITENSTEIN,%20Daniel&FATICHI,%20Simone&DOMEC,%20Jean%E2%80%90christophe&OR,%20Dani&rft.genre=article


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