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A broad survey of hydraulic and mechanical safety in the xylem of conifers

hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorBOUCHE P.S., Pauline
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorLARTER, Maximilian
hal.structure.identifierTransfert Sol-Plante et Cycle des Eléments Minéraux dans les Ecosystèmes Cultivés [TCEM]
dc.contributor.authorDOMEC, Jean-Christophe
ORCID: 0000-0003-0478-2559
IDREF: 195495667
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorBURLETT, Régis
hal.structure.identifierRoyal Botanic Gardens
dc.contributor.authorGASSON, Peter
hal.structure.identifierInstitute for Systematic Botany and Ecology
dc.contributor.authorJANSEN, Steven
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorDELZON, Sylvain
dc.date.accessioned2022-10-12T12:59:54Z
dc.date.available2022-10-12T12:59:54Z
dc.date.issued2014
dc.identifier.issn0022-0957
dc.identifier.urihttps://oskar-bordeaux.fr/handle/20.500.12278/157535
dc.description.abstractEnDrought-induced forest dieback has been widely reported over the last decades, and the evidence for a direct causal link between survival and hydraulic failure (xylem cavitation) is now well known. Because vulnerability to cavitation is intimately linked to the anatomy of the xylem, the main objective of this study was to better understand the xylem anatomical properties associated with cavitation resistance. An extensive data set of cavitation resistance traits and xylem anatomical properties was developed for 115 conifer species, with special attention given to the micro-morphology of bordered pits. The ratio of torus to pit aperture diameter, so-called torus overlap, increased with increasing cavitation resistance, while the flexibility of the margo does not seem to play a role, suggesting that air-seeding is located at the seal between the aspirated torus and pit aperture. Moreover, punctured tori were reported in various Pinaceae species. Species resistant to cavitation had thicker tracheid walls, while their lumen diameter (conduit size) was only slightly reduced, minimizing the impact on hydraulic conductance. The results also demonstrated (i) the existence of an indirect trade-off between hydraulic safety and mechanical strength; and (ii) a consistency between species distribution and xylem anatomy: species with a wide torus overlap and high valve effects are found in arid environments such as the Mediterranean region.
dc.language.isoen
dc.publisherOxford University Press (OUP)
dc.subject.enCavitation resistance
dc.subject.enhydraulic efficiency
dc.subject.enmechanical strength
dc.subject.enseal capillary–seeding
dc.subject.entorus–margo pit
dc.subject.enwall implosion.
dc.subject.enxylem anatomy
dc.title.enA broad survey of hydraulic and mechanical safety in the xylem of conifers
dc.typeArticle de revue
dc.identifier.doi10.1093/jxb/eru218
dc.subject.halSciences du Vivant [q-bio]
dc.subject.halSciences de l'environnement
bordeaux.journalJournal of Experimental Botany
bordeaux.page4419-4431
bordeaux.volume65
bordeaux.hal.laboratoriesBioGeCo (Biodiversité Gènes & Communautés) - UMR 1202*
bordeaux.issue15
bordeaux.institutionUniversité de Bordeaux
bordeaux.institutionINRAE
bordeaux.peerReviewedoui
hal.identifierhal-02641349
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02641349v1
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