Afficher la notice abrégée

Sex determines xylem anatomy in a dioecious conifer: hydraulic consequences in a drier world

dc.contributor.authorOLANO, José M.
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorGONZÁLEZ-MUÑOZ, Noelia
hal.structure.identifierSiberian Federal University [SibFU]
dc.contributor.authorARZAC, Alberto
hal.structure.identifierUniversidad de Valladolid [Valladolid] [UVa]
dc.contributor.authorROZAS, Vicente
hal.structure.identifierSwiss Federal Institute for Forest, Snow and Landscape Research WSL
hal.structure.identifierClimatic change and climate impacts
dc.contributor.authorVON ARX, Georg
hal.structure.identifierBiodiversité, Gènes & Communautés [BioGeCo]
dc.contributor.authorDELZON, Sylvain
hal.structure.identifierFacultad de Ciencias del Mar y Ambientales, Dept. Ciencias de la Tierra, Casem, Spain
dc.contributor.authorGARCÍA-CERVIGÓN, Ana I.
dc.date.issued2017
dc.identifier.issn0829-318X
dc.description.abstractEnIncreased drought frequency and severity may reshape tree species distribution in arid environments. Dioecious tree species may be more sensitive to climate warming if sex-related vulnerability to drought occurs, since lower performance of one sex may drive differential stress tolerance, sex-related mortality rates and biased sex ratios. We explored the effect of sex and environment on branch hydraulic (hydraulic conductivity and vulnerability to embolism) and trunk anatomical traits in both sexes of the dioecious conifer Juniperus thurifera L. at two sites with contrasting water availability. Additionally, we tested for a trade-off between hydraulic safety (vulnerability to embolism) and efficiency (hydraulic conductivity). Vulnerability to embolism and hydraulic conductivity were unaffected by sex or site at branch level. In contrast, sex played a significant role in xylem anatomy. We found a trade-off between hydraulic safety and efficiency, with larger conductivities related to higher vulnerabilities to embolism. At the anatomical level, females' trunk showed xylem anatomical traits related to greater hydraulic efficiency (higher theoretical hydraulic conductivity) over safety (thinner tracheid walls, lower Mork's Index), whereas males' trunk anatomy followed a more conservative strategy, especially in the drier site. Reconciling the discrepancy between branch hydraulic function and trunk xylem anatomy would require a thorough and integrated understanding of the tree structure-function relationship at the whole-plant level. Nevertheless, lower construction costs and higher efficiency in females' xylem anatomy at trunk level might explain the previously observed higher growth rates in mesic habitats. However, prioritizing efficiency over safety in trunk construction might make females more sensitive to drought, endangering the species' persistence in a drier world.
dc.language.isoen
dc.publisherOxford University Press (OUP)
dc.subject.endioecy
dc.subject.endrought
dc.subject.enhydraulic efficiency
dc.subject.enhydraulic safety
dc.subject.enJuniperus thurifera
dc.subject.enxylem anatomy
dc.title.enSex determines xylem anatomy in a dioecious conifer: hydraulic consequences in a drier world
dc.typeArticle de revue
dc.identifier.doi10.1093/treephys/tpx066
dc.subject.halSciences du Vivant [q-bio]
dc.description.sponsorshipEuropeAgreenSkills+
bordeaux.journalTree Physiology
bordeaux.page1493-1502
bordeaux.volume37
bordeaux.issue11
bordeaux.peerReviewedoui
hal.identifierhal-02624242
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02624242v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Tree%20Physiology&rft.date=2017&rft.volume=37&rft.issue=11&rft.spage=1493-1502&rft.epage=1493-1502&rft.eissn=0829-318X&rft.issn=0829-318X&rft.au=OLANO,%20Jos%C3%A9%20M.&GONZ%C3%81LEZ-MU%C3%91OZ,%20Noelia&ARZAC,%20Alberto&ROZAS,%20Vicente&VON%20ARX,%20Georg&rft.genre=article


Fichier(s) constituant ce document

FichiersTailleFormatVue

Il n'y a pas de fichiers associés à ce document.

Ce document figure dans la(les) collection(s) suivante(s)

Afficher la notice abrégée