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dc.contributor.authorLópez, Rosana-
dc.contributor.authorLópez de Heredia, Unai-
dc.contributor.authorCollada, Carmen-
dc.contributor.authorCano, Francisco Javier-
dc.contributor.authorEmerson, Brent C.-
dc.contributor.authorCochard, H.-
dc.contributor.authorGil, Luis-
dc.identifierdoi: 10.1093/aob/mct084-
dc.identifierissn: 0305-7364-
dc.identifiere-issn: 1095-8290-
dc.identifier.citationAnnals of Botany 111(6): 1167-1179 (2013)-
dc.description.abstract[Background and Aims] It is widely accepted that hydraulic failure due to xylem embolism is a key factor contributing to drought-induced mortality in trees. In the present study, an attempt is made to disentangle phenotypic plasticity from genetic variation in hydraulic traits across the entire distribution area of a tree species to detect adaptation to local environments.-
dc.description.abstract[Methods] A series of traits related to hydraulics (vulnerability to cavitation and hydraulic conductivity in branches), growth performance and leaf mass per area were assessed in eight Pinus canariensis populations growing in two common gardens under contrasting environments. In addition, the neutral genetic variability (FST) and the genetic differentiation of phenotypic variation (QST) were compared in order to identify the evolutionary forces acting on these traits.-
dc.description.abstract[Key Results] The variability for hydraulic traits was largely due to phenotypic plasticity. Nevertheless, the vulnerability to cavitation displayed a significant genetic variability (approx. 5 % of the explained variation), and a significant genetic × environment interaction (between 5 and 19 % of the explained variation). The strong correlation between vulnerability to cavitation and survival in the xeric common garden (r = –0·81; P < 0·05) suggests a role for the former in the adaptation to xeric environments. Populations from drier sites and higher temperature seasonality were less vulnerable to cavitation than those growing at mesic sites. No trade-off between xylem safety and efficiency was detected. QST of parameters of the vulnerability curve (0·365 for P50 and the slope of the vulnerability curve and 0·452 for P88) differed substantially from FST (0·091), indicating divergent selection. In contrast, genetic drift alone was found to be sufficient to explain patterns of differentiation for xylem efficiency and growth.-
dc.description.abstract[Conclusions] The ability of P. canariensis to inhabit a wide range of ecosystems seemed to be associated with high phenotypic plasticity and some degree of local adaptations of xylem and leaf traits. Resistance to cavitation conferred adaptive potential for this species to adapt successfully to xeric conditions.-
dc.description.sponsorshipWe are grateful to the Canary Islands Government, the Cabildos of Tenerife and Gran Canaria and the National Park of Caldera de Taburiente for long-standing support in the study of Canary Island pine. We thank all people involved in the plantation and measurements of the common gardens and to Christian Bodet and Pierre Conchon for their assistance with the Cavitron. R.L. was supported by a González Esparcia fellowship during her stay in Clermont-Ferrand. This work was supported by the Spanish Ministry of Science in the Project AGL2009-10606 (VULCAN).-
dc.publisherOxford University Press-
dc.subjectPhenotypic plasticity-
dc.subjectVulnerability to cavitation-
dc.subjectPinus canariensis-
dc.subjectCommon garden-
dc.subjectGenetic differentiation-
dc.subjectHydraulic conductivity-
dc.titleVulnerability to cavitation, hydraulic efficiency, growth and survival in an insular pine (Pinus canariensis)-
dc.description.versionPeer Reviewed-
dc.contributor.funderGobierno de Canarias-
dc.contributor.funderCabildo de Tenerife-
dc.contributor.funderMinisterio de Ciencia e Innovación (España)-
dc.contributor.funderMinisterio de Ciencia e Innovación (España)-
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