Afficher la notice abrégée

Hydraulic traits are coupled with plant anatomical traits under drought–rewatering cycles in Ginkgo biloba L.

hal.structure.identifierChinese Academy of Forestry
dc.contributor.authorLI, Shan
hal.structure.identifierInstitut de Physique de Nice [INPHYNI]
dc.contributor.authorLI, Xin
hal.structure.identifierAcademy of Mathematics and Systems Science [AMSS]
dc.contributor.authorWANG, Jie
hal.structure.identifierChinese Academy of Forestry
dc.contributor.authorCHEN, Zhicheng
hal.structure.identifierShaanxi University of Science and Technology
dc.contributor.authorLU, Sen
hal.structure.identifierChinese Academy of Forestry
dc.contributor.authorWAN, Xianchong
hal.structure.identifierPrinceton University
dc.contributor.authorSUN, Hongyan
hal.structure.identifierBiologie Cellulaire et Cancer
dc.contributor.authorWANG, Li
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.authorCOCHARD, Hervé
hal.structure.identifierChinese Academy of Forestry
dc.contributor.authorJIANG, Xiaomei
hal.structure.identifierBeijing Inst Landscape Architecture
dc.contributor.authorSHU, Jianhua
hal.structure.identifierBeijing Forestry University
dc.contributor.authorZHENG, Jingming
hal.structure.identifierChinese Academy of Forestry
dc.contributor.authorYIN, Yafang
dc.date.issued2021-12-28
dc.identifier.issn0829-318X
dc.description.abstractEnAbstract Investigating the responses of plant anatomical traits of trees to drought–rewatering cycles helps us to understand their responses to climate change; however, such work has not been adequately reported. In this study, Ginkgo biloba L. saplings were subjected to moderate, severe, extreme and lethal drought conditions by withholding water according to the percentage loss of hydraulic conductivity (PLC) and rewatering on a regular basis. Samples of phloem, cambium and xylem were collected to quantify their cellular properties including cambium and phloem cell vitality, xylem growth ring width, pit aspiration rates and pit membrane thickness using light microscopy and transmission microscopy. The results showed that the mortality rate of G. biloba saplings reached 90% at approximately P88 (xylem water potential inducing 88% loss of hydraulic conductivity). The onset of cambium and phloem cell mortality might be in accordance with that of xylem embolism. Close negative correlations between xylem water potential and PLC and between xylem water potential and cambium and phloem mortality suggested that xylem hydraulic traits are coupled with anatomical traits under declining xylem water potential. Cambium and phloem cell vitality as well as xylem growth ring width decreased significantly with increasing drought conditions. However, xylem pit membrane thickness, cambial zone width and cambial cell geometry were not affected by the drought–rewatering cycles. The tracheid radial diameter, intertracheid cell wall thickness and tracheid density decreased significantly during both drought conditions and rewatering conditions. In addition to hydraulic traits, cambium and phloem cell vitality can be used as anatomical traits to evaluate the mortality of G. biloba under drought. Future work is proposed to observe the dynamics of pit aspiration rates under drought–rewatering cycles in situ to deepen our understanding of the essential role of bordered pits in the ‘air-seeding’ mechanism.
dc.language.isoen
dc.publisherOxford University Press (OUP)
dc.subject.encambium and phloem cell vitality
dc.subject.enlethal water potential under drought
dc.subject.enpit aspiration rate
dc.subject.enpit membrane thickness
dc.subject.entree mortality
dc.subject.enxylem growth ring width
dc.subject.enxylem vulnerability curves
dc.title.enHydraulic traits are coupled with plant anatomical traits under drought–rewatering cycles in Ginkgo biloba L.
dc.typeArticle de revue
dc.identifier.doi10.1093/treephys/tpab174
dc.subject.halSciences du Vivant [q-bio]/Biologie végétale
bordeaux.journalTree Physiology
bordeaux.page12 p.
bordeaux.peerReviewedoui
hal.identifierhal-03672827
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03672827v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Tree%20Physiology&rft.date=2021-12-28&rft.spage=12%20p.&rft.epage=12%20p.&rft.eissn=0829-318X&rft.issn=0829-318X&rft.au=LI,%20Shan&LI,%20Xin&WANG,%20Jie&CHEN,%20Zhicheng&LU,%20Sen&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