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Is xylem of angiosperm leaves less resistant to embolism than branches? Insights from microCT, hydraulics, and anatomy
hal.structure.identifier | Universität Ulm - Ulm University [Ulm, Allemagne] | |
dc.contributor.author | KLEPSCH, M. | |
hal.structure.identifier | Universität Ulm - Ulm University [Ulm, Allemagne] | |
dc.contributor.author | ZHANG, Y. | |
hal.structure.identifier | Macquarie University [Sydney] | |
dc.contributor.author | KOTOWSKA, M. M. | |
hal.structure.identifier | Biodiversité, Gènes & Communautés [BioGeCo] | |
hal.structure.identifier | Ecophysiologie et Génomique Fonctionnelle de la Vigne [UMR EGFV] | |
dc.contributor.author | LAMARQUE, Laurent J. | |
hal.structure.identifier | Western Sydney University | |
dc.contributor.author | NOLF, M. | |
hal.structure.identifier | Georg-August-University = Georg-August-Universität Göttingen | |
dc.contributor.author | SCHULDT, B. | |
hal.structure.identifier | Biodiversité, Gènes & Communautés [BioGeCo] | |
hal.structure.identifier | Laboratoire de Physique et Physiologie Intégratives de l’Arbre en environnement Fluctuant [PIAF] | |
dc.contributor.author | TORRES RUIZ, Jose Manuel | |
hal.structure.identifier | Guangxi University [Nanning] | |
dc.contributor.author | QIN, D. -W. | |
hal.structure.identifier | Western Sydney University | |
dc.contributor.author | CHOAT, B. | |
hal.structure.identifier | Biodiversité, Gènes & Communautés [BioGeCo] | |
dc.contributor.author | DELZON, Sylvain | |
dc.contributor.author | SCOFFONI, C. | |
hal.structure.identifier | Guangxi Normal University | |
dc.contributor.author | CAO, K. -F. | |
hal.structure.identifier | Universität Ulm - Ulm University [Ulm, Allemagne] | |
dc.contributor.author | JANSEN, S. | |
dc.date.issued | 2018 | |
dc.identifier.issn | 0022-0957 | |
dc.description.abstractEn | According to the hydraulic vulnerability segmentation hypothesis, leaves are more vulnerable to decline of hydraulic conductivity than branches, but whether stem xylem is more embolism resistant than leaves remains unclear.Drought-induced embolism resistance of leaf xylem was investigated based on X-ray computed tomography (microCT) for Betula pendula, Laurus nobilis, and Liriodendron tulipifera, excluding outside-xylem, and compared to hydraulic vulnerability curves for branch xylem. Moreover, bordered pit characters related to embolism resistance were investigated for both organs. Theoretical P50-values (i.e., the xylem pressure corresponding to 50% loss of hydraulic conductance) of leaves were generally within the same range as hydraulic P50 values of branches. P50 values of leaves were similar to branches for L. tulipifera (-2.01 vs. -2.10 MPa, respectively), more negative for B. pendula (-2.87 vs. -1.80 MPa), and less negative for L. nobilis (-6.4 vs. -9.2 MPa). Despite more narrow conduits in leaves than branches, mean interconduit pit membrane thickness was similar in both organs, but significantly higher in leaves of B. pendula than branches. This case study indicates that xylem shows a largely similar embolism resistance across leaves and branches, although differences both within and across organs may occur, suggesting interspecific variation to the hydraulic vulnerability segmentation hypothesis. | |
dc.language.iso | en | |
dc.publisher | Oxford University Press (OUP) | |
dc.title.en | Is xylem of angiosperm leaves less resistant to embolism than branches? Insights from microCT, hydraulics, and anatomy | |
dc.type | Article de revue | |
dc.identifier.doi | 10.1093/jxb/ery321 | |
dc.subject.hal | Sciences du Vivant [q-bio]/Biologie végétale | |
bordeaux.journal | Journal of Experimental Botany | |
bordeaux.page | 5611-5623 | |
bordeaux.volume | 69 | |
bordeaux.issue | 22 | |
bordeaux.peerReviewed | oui | |
hal.identifier | hal-02536993 | |
hal.version | 1 | |
hal.popular | non | |
hal.audience | Internationale | |
hal.origin.link | https://hal.archives-ouvertes.fr//hal-02536993v1 | |
bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Experimental%20Botany&rft.date=2018&rft.volume=69&rft.issue=22&rft.spage=5611-5623&rft.epage=5611-5623&rft.eissn=0022-0957&rft.issn=0022-0957&rft.au=KLEPSCH,%20M.&ZHANG,%20Y.&KOTOWSKA,%20M.%20M.&LAMARQUE,%20Laurent%20J.&NOLF,%20M.&rft.genre=article |
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