Linking irradiance-induced changes in pit membrane ultrastructure with xylem vulnerability to cavitation.
Identifieur interne : 002E03 ( Main/Exploration ); précédent : 002E02; suivant : 002E04Linking irradiance-induced changes in pit membrane ultrastructure with xylem vulnerability to cavitation.
Auteurs : Lenka Plavcová [États-Unis] ; Uwe G. Hacke ; John S. SperrySource :
- Plant, cell & environment [ 1365-3040 ] ; 2011.
Descripteurs français
- KwdFr :
- Feuilles de plante (cytologie), Feuilles de plante (effets des radiations), Feuilles de plante (physiologie), Lumière (MeSH), Membrane cellulaire (ultrastructure), Microscopie électronique à balayage (MeSH), Microscopie électronique à transmission (MeSH), Paroi cellulaire (ultrastructure), Pectine (analyse), Populus (cytologie), Populus (effets des radiations), Populus (physiologie), Porosité (MeSH), Xylème (cytologie), Xylème (effets des radiations), Xylème (physiologie).
- MESH :
- analyse : Pectine.
- cytologie : Feuilles de plante, Populus, Xylème.
- effets des radiations : Feuilles de plante, Populus, Xylème.
- physiologie : Feuilles de plante, Populus, Xylème.
- ultrastructure : Lumière, Membrane cellulaire, Microscopie électronique à balayage, Microscopie électronique à transmission, Paroi cellulaire, Porosité.
English descriptors
- KwdEn :
- Cell Membrane (ultrastructure), Cell Wall (ultrastructure), Light (MeSH), Microscopy, Electron, Scanning (MeSH), Microscopy, Electron, Transmission (MeSH), Pectins (analysis), Plant Leaves (cytology), Plant Leaves (physiology), Plant Leaves (radiation effects), Populus (cytology), Populus (physiology), Populus (radiation effects), Porosity (MeSH), Xylem (cytology), Xylem (physiology), Xylem (radiation effects).
- MESH :
- chemical , analysis : Pectins.
- cytology : Plant Leaves, Populus, Xylem.
- physiology : Plant Leaves, Populus, Xylem.
- radiation effects : Plant Leaves, Populus, Xylem.
- ultrastructure : Cell Membrane, Cell Wall.
- Light, Microscopy, Electron, Scanning, Microscopy, Electron, Transmission, Porosity.
Abstract
The effect of shading on xylem hydraulic traits and xylem anatomy was studied in hybrid poplar (Populus trichocarpa x deltoides, clone H11-11). Hydraulic measurements conducted on stem segments of 3-month-old saplings grown in shaded (SH) or control light (C) conditions indicated that shading resulted in more vulnerable and less efficient xylem. Air is thought to enter vessels through pores in inter-vessel pit membranes, thereby nucleating cavitation. Therefore, we tested if the ultrastructure and/or chemistry of pit membranes differed in SH and C plants. Transmission electron micrographs revealed that pit membranes were thinner in SH, which was paralleled by lower compound middle lamella thickness. Immunolabelling with JIM5 and JIM7 monoclonal antibodies surprisingly indicated that pectic homogalacturonans were not present in the mature pit membrane regardless of the light treatment. Porosity measurements conducted with scanning electron microscopy were significantly affected by the method used for sample dehydration. Drying through a gradual ethanol series seems to be a better alternative to drying directly from a hydrated state for pit membrane observations in poplar. Scanning electron microscopy based estimates of pit membrane porosity probably overestimated real porosity as suggested by the results from the 'rare pit' model.
DOI: 10.1111/j.1365-3040.2010.02258.x
PubMed: 21118422
Affiliations:
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Hacke</name></author><author><name sortKey="Sperry, John S" sort="Sperry, John S" uniqKey="Sperry J" first="John S" last="Sperry">John S. 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Hydraulic measurements conducted on stem segments of 3-month-old saplings grown in shaded (SH) or control light (C) conditions indicated that shading resulted in more vulnerable and less efficient xylem. Air is thought to enter vessels through pores in inter-vessel pit membranes, thereby nucleating cavitation. Therefore, we tested if the ultrastructure and/or chemistry of pit membranes differed in SH and C plants. Transmission electron micrographs revealed that pit membranes were thinner in SH, which was paralleled by lower compound middle lamella thickness. Immunolabelling with JIM5 and JIM7 monoclonal antibodies surprisingly indicated that pectic homogalacturonans were not present in the mature pit membrane regardless of the light treatment. Porosity measurements conducted with scanning electron microscopy were significantly affected by the method used for sample dehydration. Drying through a gradual ethanol series seems to be a better alternative to drying directly from a hydrated state for pit membrane observations in poplar. Scanning electron microscopy based estimates of pit membrane porosity probably overestimated real porosity as suggested by the results from the 'rare pit' model.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">21118422</PMID><DateCompleted><Year>2011</Year><Month>05</Month><Day>23</Day></DateCompleted><DateRevised><Year>2018</Year><Month>12</Month><Day>01</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1365-3040</ISSN><JournalIssue CitedMedium="Internet"><Volume>34</Volume><Issue>3</Issue><PubDate><Year>2011</Year><Month>Mar</Month></PubDate></JournalIssue><Title>Plant, cell & environment</Title><ISOAbbreviation>Plant Cell Environ</ISOAbbreviation></Journal><ArticleTitle>Linking irradiance-induced changes in pit membrane ultrastructure with xylem vulnerability to cavitation.</ArticleTitle><Pagination><MedlinePgn>501-13</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1111/j.1365-3040.2010.02258.x</ELocationID><Abstract><AbstractText>The effect of shading on xylem hydraulic traits and xylem anatomy was studied in hybrid poplar (Populus trichocarpa x deltoides, clone H11-11). Hydraulic measurements conducted on stem segments of 3-month-old saplings grown in shaded (SH) or control light (C) conditions indicated that shading resulted in more vulnerable and less efficient xylem. Air is thought to enter vessels through pores in inter-vessel pit membranes, thereby nucleating cavitation. Therefore, we tested if the ultrastructure and/or chemistry of pit membranes differed in SH and C plants. Transmission electron micrographs revealed that pit membranes were thinner in SH, which was paralleled by lower compound middle lamella thickness. Immunolabelling with JIM5 and JIM7 monoclonal antibodies surprisingly indicated that pectic homogalacturonans were not present in the mature pit membrane regardless of the light treatment. Porosity measurements conducted with scanning electron microscopy were significantly affected by the method used for sample dehydration. Drying through a gradual ethanol series seems to be a better alternative to drying directly from a hydrated state for pit membrane observations in poplar. Scanning electron microscopy based estimates of pit membrane porosity probably overestimated real porosity as suggested by the results from the 'rare pit' model.</AbstractText><CopyrightInformation>© 2010 Blackwell Publishing Ltd.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Plavcová</LastName><ForeName>Lenka</ForeName><Initials>L</Initials><AffiliationInfo><Affiliation>Department of Renewable Resources, University of Alberta, Alberta, Canada T6G 2E3, and Department of Biology, University of Utah, Salt Lake City, UT 84025, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Hacke</LastName><ForeName>Uwe G</ForeName><Initials>UG</Initials></Author><Author ValidYN="Y"><LastName>Sperry</LastName><ForeName>John S</ForeName><Initials>JS</Initials></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>2010</Year><Month>12</Month><Day>30</Day></ArticleDate></Article><MedlineJournalInfo><Country>United States</Country><MedlineTA>Plant Cell Environ</MedlineTA><NlmUniqueID>9309004</NlmUniqueID><ISSNLinking>0140-7791</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>89NA02M4RX</RegistryNumber><NameOfSubstance UI="D010368">Pectins</NameOfSubstance></Chemical><Chemical><RegistryNumber>VV3XD4CL04</RegistryNumber><NameOfSubstance UI="C003181">polygalacturonic acid</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D002462" MajorTopicYN="N">Cell Membrane</DescriptorName><QualifierName UI="Q000648" MajorTopicYN="Y">ultrastructure</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D002473" MajorTopicYN="N">Cell Wall</DescriptorName><QualifierName UI="Q000648" MajorTopicYN="N">ultrastructure</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D008027" MajorTopicYN="Y">Light</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D008855" MajorTopicYN="N">Microscopy, Electron, Scanning</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D046529" MajorTopicYN="N">Microscopy, Electron, Transmission</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D010368" MajorTopicYN="N">Pectins</DescriptorName><QualifierName UI="Q000032" MajorTopicYN="N">analysis</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018515" MajorTopicYN="N">Plant Leaves</DescriptorName><QualifierName UI="Q000166" MajorTopicYN="N">cytology</QualifierName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName><QualifierName UI="Q000528" MajorTopicYN="N">radiation effects</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName><QualifierName UI="Q000166" MajorTopicYN="N">cytology</QualifierName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName><QualifierName UI="Q000528" MajorTopicYN="N">radiation effects</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D016062" MajorTopicYN="N">Porosity</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D052584" MajorTopicYN="N">Xylem</DescriptorName><QualifierName UI="Q000166" MajorTopicYN="N">cytology</QualifierName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName><QualifierName UI="Q000528" MajorTopicYN="Y">radiation effects</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2010</Year><Month>12</Month><Day>2</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2010</Year><Month>12</Month><Day>2</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2011</Year><Month>5</Month><Day>24</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">21118422</ArticleId><ArticleId IdType="doi">10.1111/j.1365-3040.2010.02258.x</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>États-Unis</li></country><region><li>Utah</li></region></list><tree><noCountry><name sortKey="Hacke, Uwe G" sort="Hacke, Uwe G" uniqKey="Hacke U" first="Uwe G" last="Hacke">Uwe G. Hacke</name><name sortKey="Sperry, John S" sort="Sperry, John S" uniqKey="Sperry J" first="John S" last="Sperry">John S. Sperry</name></noCountry><country name="États-Unis"><region name="Utah"><name sortKey="Plavcova, Lenka" sort="Plavcova, Lenka" uniqKey="Plavcova L" first="Lenka" last="Plavcová">Lenka Plavcová</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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