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High variation in hydraulic efficiency but not xylem safety between roots and branches in four temperate broad‐leaved tree species

dc.contributor.authorLÜBBE, Torben
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorLAMARQUE, Laurent
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.authorTORRES RUIZ, Jose Manuel
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorBURLETT, Régis
hal.structure.identifierGeorg-August-University = Georg-August-Universität Göttingen
dc.contributor.authorLEUSCHNER, Christoph
hal.structure.identifierJulius-Maximilians-Universität Würzburg = University of Würzburg [JMU]
dc.contributor.authorSCHULDT, Bernhard
dc.date.issued2021-12-27
dc.identifier.issn0269-8463
dc.description.abstractEn1. Xylem hydraulic safety and efficiency are key traits determining tree fitness in a warmer and drier world. While numerous plant hydraulic studies have focused on branches, our understanding of root hydraulic functioning remains limited, although roots control water uptake, influence stomatal regulation and have commonly been considered as the most vulnerable organ along the hydraulic pathway.2. We investigated 11 traits related to xylem safety and efficiency along the hydraulic pathway in four temperate broad-leaved tree species.3. Continuous vessel tapering from coarse roots to stems and branches caused considerable reduction in hydraulic efficiency. Wood density was always lowest in roots, but did not decline linearly along the flow path. In contrast, xylem embolism resistance (P-50) did not differ significantly between roots and branches, except for one species. The limited variation in xylem safety between organs did not adequately reflect the corresponding reductions in vessel diameter (by similar to 70%) and hydraulic efficiency (by similar to 85%). Although we did not observe any trade-off between xylem safety and specific conductivity, vessel diameter, vessel lumen fraction and wood density were related to embolism resistance, both across and partly within organs.4. We conclude that coarse roots are not highly vulnerable to xylem embolism as commonly believed, indicating that hydraulic failure during soil drying might be restricted to fine roots. A free Plain Language Summary can be found within the Supporting Information of this article.
dc.description.sponsorshipCOntinental To coastal Ecosystems: evolution, adaptability and governance - ANR-10-LABX-0045
dc.description.sponsorshipPlateforme d'Innovation " Forêt-Bois-Fibre-Biomasse du Futur " - ANR-10-EQPX-0016
dc.language.isoen
dc.publisherWiley
dc.rights.urihttp://creativecommons.org/licenses/by/
dc.subject.enembolism resistance
dc.subject.enflow path
dc.subject.enhydraulic architecture
dc.subject.enhydraulic conductivity
dc.subject.envessel tapering
dc.subject.envulnerability curve
dc.subject.enwood anatomy
dc.subject.enwood density
dc.title.enHigh variation in hydraulic efficiency but not xylem safety between roots and branches in four temperate broad‐leaved tree species
dc.typeArticle de revue
dc.identifier.doi10.1111/1365-2435.13975
dc.subject.halSciences du Vivant [q-bio]/Biologie végétale
dc.description.sponsorshipEuropeEuropean Research council
bordeaux.journalFunctional Ecology
bordeaux.page14 p.
bordeaux.peerReviewedoui
hal.identifierhal-03515312
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03515312v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Functional%20Ecology&rft.date=2021-12-27&rft.spage=14%20p.&rft.epage=14%20p.&rft.eissn=0269-8463&rft.issn=0269-8463&rft.au=L%C3%9CBBE,%20Torben&LAMARQUE,%20Laurent&DELZON,%20Sylvain&TORRES%20RUIZ,%20Jose%20Manuel&BURLETT,%20R%C3%A9gis&rft.genre=article


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