Visual quantification of embolism reveals leaf vulnerability to hydraulic failure.
Identifieur interne : 002117 ( PubMed/Curation ); précédent : 002116; suivant : 002118Visual quantification of embolism reveals leaf vulnerability to hydraulic failure.
Auteurs : Timothy J. Brodribb [Australie] ; Robert P. Skelton [Australie] ; Scott A M. Mcadam [Australie] ; Diane Bienaimé [France] ; Christopher J. Lucani [Australie] ; Philippe Marmottant [France]Source :
- The New phytologist [ 1469-8137 ] ; 2016.
Descripteurs français
- KwdFr :
- MESH :
- physiologie : Angiospermes, Feuilles de plante, Xylème.
- Dessiccation, Eau, Imagerie tridimensionnelle, Spécificité d'espèce.
English descriptors
- KwdEn :
- MESH :
- chemical : Water.
- physiology : Angiosperms, Plant Leaves, Xylem.
- Desiccation, Imaging, Three-Dimensional, Species Specificity.
Abstract
Vascular plant mortality during drought has been strongly linked to a failure of the internal water transport system caused by the rapid invasion of air and subsequent blockage of xylem conduits. Quantification of this critical process is greatly complicated by the existence of high water tension in xylem cells making them prone to embolism during experimental manipulation. Here we describe a simple new optical method that can be used to record spatial and temporal patterns of embolism formation in the veins of water-stressed leaves for the first time. Applying this technique in four diverse angiosperm species we found very strong agreement between the dynamics of embolism formation during desiccation and decline of leaf hydraulic conductance. These data connect the failure of the leaf water transport network under drought stress to embolism formation in the leaf xylem, and suggest embolism occurs after stomatal closure under extreme water stress.
DOI: 10.1111/nph.13846
PubMed: 26742653
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Quantification of this critical process is greatly complicated by the existence of high water tension in xylem cells making them prone to embolism during experimental manipulation. Here we describe a simple new optical method that can be used to record spatial and temporal patterns of embolism formation in the veins of water-stressed leaves for the first time. Applying this technique in four diverse angiosperm species we found very strong agreement between the dynamics of embolism formation during desiccation and decline of leaf hydraulic conductance. These data connect the failure of the leaf water transport network under drought stress to embolism formation in the leaf xylem, and suggest embolism occurs after stomatal closure under extreme water stress.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">26742653</PMID><DateCreated><Year>2016</Year><Month>02</Month><Day>04</Day></DateCreated><DateCompleted><Year>2016</Year><Month>12</Month><Day>19</Day></DateCompleted><DateRevised><Year>2017</Year><Month>11</Month><Day>16</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1469-8137</ISSN><JournalIssue CitedMedium="Internet"><Volume>209</Volume><Issue>4</Issue><PubDate><Year>2016</Year><Month>Mar</Month></PubDate></JournalIssue><Title>The New phytologist</Title><ISOAbbreviation>New Phytol.</ISOAbbreviation></Journal><ArticleTitle>Visual quantification of embolism reveals leaf vulnerability to hydraulic failure.</ArticleTitle><Pagination><MedlinePgn>1403-9</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1111/nph.13846</ELocationID><Abstract><AbstractText>Vascular plant mortality during drought has been strongly linked to a failure of the internal water transport system caused by the rapid invasion of air and subsequent blockage of xylem conduits. Quantification of this critical process is greatly complicated by the existence of high water tension in xylem cells making them prone to embolism during experimental manipulation. Here we describe a simple new optical method that can be used to record spatial and temporal patterns of embolism formation in the veins of water-stressed leaves for the first time. Applying this technique in four diverse angiosperm species we found very strong agreement between the dynamics of embolism formation during desiccation and decline of leaf hydraulic conductance. These data connect the failure of the leaf water transport network under drought stress to embolism formation in the leaf xylem, and suggest embolism occurs after stomatal closure under extreme water stress.</AbstractText><CopyrightInformation>© 2016 The Authors. New Phytologist © 2016 New Phytologist Trust.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Brodribb</LastName><ForeName>Timothy J</ForeName><Initials>TJ</Initials><AffiliationInfo><Affiliation>School of Biological Sciences, University of Tasmania, Hobart, Tas., 7001, Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Skelton</LastName><ForeName>Robert P</ForeName><Initials>RP</Initials><AffiliationInfo><Affiliation>School of Biological Sciences, University of Tasmania, Hobart, Tas., 7001, Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>McAdam</LastName><ForeName>Scott A M</ForeName><Initials>SA</Initials><AffiliationInfo><Affiliation>School of Biological Sciences, University of Tasmania, Hobart, Tas., 7001, Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Bienaimé</LastName><ForeName>Diane</ForeName><Initials>D</Initials><AffiliationInfo><Affiliation>LIPhy UMR 5588, CNRS/Université Grenoble-Alpes, Grenoble, F-38401, France.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Lucani</LastName><ForeName>Christopher J</ForeName><Initials>CJ</Initials><AffiliationInfo><Affiliation>School of Biological Sciences, University of Tasmania, Hobart, Tas., 7001, Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Marmottant</LastName><ForeName>Philippe</ForeName><Initials>P</Initials><AffiliationInfo><Affiliation>LIPhy UMR 5588, CNRS/Université Grenoble-Alpes, Grenoble, F-38401, France.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2016</Year><Month>01</Month><Day>07</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>New Phytol</MedlineTA><NlmUniqueID>9882884</NlmUniqueID><ISSNLinking>0028-646X</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>059QF0KO0R</RegistryNumber><NameOfSubstance UI="D014867">Water</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D019684" MajorTopicYN="N">Angiosperms</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D003890" MajorTopicYN="N">Desiccation</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D021621" MajorTopicYN="N">Imaging, Three-Dimensional</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018515" MajorTopicYN="N">Plant Leaves</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D013045" MajorTopicYN="N">Species Specificity</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014867" MajorTopicYN="N">Water</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D052584" MajorTopicYN="N">Xylem</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading></MeshHeadingList><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">cavitation</Keyword><Keyword MajorTopicYN="N">drought</Keyword><Keyword MajorTopicYN="N">leaf hydraulic</Keyword><Keyword MajorTopicYN="N">optical</Keyword><Keyword MajorTopicYN="N">stomata</Keyword><Keyword MajorTopicYN="N">water stress</Keyword><Keyword MajorTopicYN="N">xylem</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2015</Year><Month>10</Month><Day>22</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2015</Year><Month>12</Month><Day>08</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2016</Year><Month>1</Month><Day>9</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2016</Year><Month>1</Month><Day>9</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2016</Year><Month>12</Month><Day>20</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">26742653</ArticleId><ArticleId IdType="doi">10.1111/nph.13846</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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