Stomatal factors and vulnerability of stem xylem to cavitation in poplars.
Identifieur interne : 002D07 ( Main/Exploration ); précédent : 002D06; suivant : 002D08Stomatal factors and vulnerability of stem xylem to cavitation in poplars.
Auteurs : Adriana Arango-Velez ; Janusz J. Zwiazek ; Barb R. Thomas ; Melvin T. TyreeSource :
- Physiologia plantarum [ 1399-3054 ] ; 2011.
Descripteurs français
- KwdFr :
- Eau (métabolisme), Feuilles de plante (métabolisme), Feuilles de plante (physiologie), Populus (métabolisme), Populus (physiologie), Sol (composition chimique), Spécificité d'espèce (MeSH), Stomates de plante (métabolisme), Stomates de plante (physiologie), Stress physiologique (MeSH), Sécheresses (MeSH), Tiges de plante (métabolisme), Tiges de plante (physiologie), Transpiration des plantes (MeSH), Xylème (métabolisme), Xylème (physiologie).
- MESH :
- composition chimique : Sol.
- métabolisme : Eau, Feuilles de plante, Populus, Stomates de plante, Tiges de plante, Xylème.
- physiologie : Feuilles de plante, Populus, Stomates de plante, Tiges de plante, Xylème.
- Spécificité d'espèce, Stress physiologique, Sécheresses, Transpiration des plantes.
English descriptors
- KwdEn :
- Droughts (MeSH), Plant Leaves (metabolism), Plant Leaves (physiology), Plant Stems (metabolism), Plant Stems (physiology), Plant Stomata (metabolism), Plant Stomata (physiology), Plant Transpiration (MeSH), Populus (metabolism), Populus (physiology), Soil (chemistry), Species Specificity (MeSH), Stress, Physiological (MeSH), Water (metabolism), Xylem (metabolism), Xylem (physiology).
- MESH :
- chemical , chemistry : Soil.
- metabolism : Plant Leaves, Plant Stems, Plant Stomata, Populus, Water, Xylem.
- physiology : Plant Leaves, Plant Stems, Plant Stomata, Populus, Xylem.
- Droughts, Plant Transpiration, Species Specificity, Stress, Physiological.
Abstract
The relationships between the vulnerability of stem xylem to cavitation, stomatal conductance, stomatal density, and leaf and stem water potential were examined in six hybrid poplar (P38P38, Walker, Okanese, Northwest, Assiniboine and Berlin) and balsam poplar (Populus balsamifera) clones. Stem xylem cavitation resistance was examined with the Cavitron technique in well-watered plants grown in the greenhouse. To investigate stomatal responses to drought, plants were subjected to drought stress by withholding watering for 5 (mild drought) and 7 (severe drought) days and to stress recovery by rewatering severely stressed plants for 30 min and 2 days. The clones varied in stomatal sensitivity to drought and vulnerability to stem xylem cavitation. P38P38 reduced stomatal conductance in response to mild stress while the balsam poplar clone maintained high leaf stomatal conductance under more severe drought stress conditions. Differences between the severely stressed clones were also observed in leaf water potentials with no or relatively small decreases in Assiniboine, P38P38, Okanese and Walker. Vulnerability to drought-induced stem xylem embolism revealed that balsam poplar and Northwest clones reached loss of conductivity at lower stem water potentials compared with the remaining clones. There was a strong link between stem xylem resistance to cavitation and stomatal responsiveness to drought stress in balsam poplar and P38P38. However, the differences in stomatal responsiveness to mild drought suggest that other drought-resistant strategies may also play a key role in some clones of poplars exposed to drought stress.
DOI: 10.1111/j.1399-3054.2011.01489.x
PubMed: 21623799
Affiliations:
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Le document en format XML
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Stem xylem cavitation resistance was examined with the Cavitron technique in well-watered plants grown in the greenhouse. To investigate stomatal responses to drought, plants were subjected to drought stress by withholding watering for 5 (mild drought) and 7 (severe drought) days and to stress recovery by rewatering severely stressed plants for 30 min and 2 days. The clones varied in stomatal sensitivity to drought and vulnerability to stem xylem cavitation. P38P38 reduced stomatal conductance in response to mild stress while the balsam poplar clone maintained high leaf stomatal conductance under more severe drought stress conditions. Differences between the severely stressed clones were also observed in leaf water potentials with no or relatively small decreases in Assiniboine, P38P38, Okanese and Walker. Vulnerability to drought-induced stem xylem embolism revealed that balsam poplar and Northwest clones reached loss of conductivity at lower stem water potentials compared with the remaining clones. There was a strong link between stem xylem resistance to cavitation and stomatal responsiveness to drought stress in balsam poplar and P38P38. However, the differences in stomatal responsiveness to mild drought suggest that other drought-resistant strategies may also play a key role in some clones of poplars exposed to drought stress.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">21623799</PMID><DateCompleted><Year>2011</Year><Month>12</Month><Day>20</Day></DateCompleted><DateRevised><Year>2017</Year><Month>11</Month><Day>16</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1399-3054</ISSN><JournalIssue CitedMedium="Internet"><Volume>143</Volume><Issue>2</Issue><PubDate><Year>2011</Year><Month>Oct</Month></PubDate></JournalIssue><Title>Physiologia plantarum</Title><ISOAbbreviation>Physiol Plant</ISOAbbreviation></Journal><ArticleTitle>Stomatal factors and vulnerability of stem xylem to cavitation in poplars.</ArticleTitle><Pagination><MedlinePgn>154-65</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1111/j.1399-3054.2011.01489.x</ELocationID><Abstract><AbstractText>The relationships between the vulnerability of stem xylem to cavitation, stomatal conductance, stomatal density, and leaf and stem water potential were examined in six hybrid poplar (P38P38, Walker, Okanese, Northwest, Assiniboine and Berlin) and balsam poplar (Populus balsamifera) clones. Stem xylem cavitation resistance was examined with the Cavitron technique in well-watered plants grown in the greenhouse. To investigate stomatal responses to drought, plants were subjected to drought stress by withholding watering for 5 (mild drought) and 7 (severe drought) days and to stress recovery by rewatering severely stressed plants for 30 min and 2 days. The clones varied in stomatal sensitivity to drought and vulnerability to stem xylem cavitation. P38P38 reduced stomatal conductance in response to mild stress while the balsam poplar clone maintained high leaf stomatal conductance under more severe drought stress conditions. Differences between the severely stressed clones were also observed in leaf water potentials with no or relatively small decreases in Assiniboine, P38P38, Okanese and Walker. Vulnerability to drought-induced stem xylem embolism revealed that balsam poplar and Northwest clones reached loss of conductivity at lower stem water potentials compared with the remaining clones. There was a strong link between stem xylem resistance to cavitation and stomatal responsiveness to drought stress in balsam poplar and P38P38. However, the differences in stomatal responsiveness to mild drought suggest that other drought-resistant strategies may also play a key role in some clones of poplars exposed to drought stress.</AbstractText><CopyrightInformation>Copyright © Physiologia Plantarum 2011.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Arango-Velez</LastName><ForeName>Adriana</ForeName><Initials>A</Initials><AffiliationInfo><Affiliation>Department of Renewable Resources, University of Alberta, Edmonton, AB, T6G 2E3 Canada.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Zwiazek</LastName><ForeName>Janusz J</ForeName><Initials>JJ</Initials></Author><Author ValidYN="Y"><LastName>Thomas</LastName><ForeName>Barb R</ForeName><Initials>BR</Initials></Author><Author ValidYN="Y"><LastName>Tyree</LastName><ForeName>Melvin T</ForeName><Initials>MT</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D003160">Comparative Study</PublicationType><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2011</Year><Month>06</Month><Day>28</Day></ArticleDate></Article><MedlineJournalInfo><Country>Denmark</Country><MedlineTA>Physiol Plant</MedlineTA><NlmUniqueID>1256322</NlmUniqueID><ISSNLinking>0031-9317</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D012987">Soil</NameOfSubstance></Chemical><Chemical><RegistryNumber>059QF0KO0R</RegistryNumber><NameOfSubstance UI="D014867">Water</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D055864" MajorTopicYN="N">Droughts</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018515" MajorTopicYN="N">Plant Leaves</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018547" MajorTopicYN="N">Plant Stems</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D054046" MajorTopicYN="N">Plant Stomata</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018526" MajorTopicYN="N">Plant Transpiration</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D012987" MajorTopicYN="N">Soil</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D013045" MajorTopicYN="N">Species Specificity</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D013312" MajorTopicYN="N">Stress, Physiological</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014867" MajorTopicYN="N">Water</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D052584" MajorTopicYN="N">Xylem</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2011</Year><Month>6</Month><Day>1</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2011</Year><Month>6</Month><Day>1</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2011</Year><Month>12</Month><Day>21</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">21623799</ArticleId><ArticleId IdType="doi">10.1111/j.1399-3054.2011.01489.x</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list></list><tree><noCountry><name sortKey="Arango Velez, Adriana" sort="Arango Velez, Adriana" uniqKey="Arango Velez A" first="Adriana" last="Arango-Velez">Adriana Arango-Velez</name><name sortKey="Thomas, Barb R" sort="Thomas, Barb R" uniqKey="Thomas B" first="Barb R" last="Thomas">Barb R. Thomas</name><name sortKey="Tyree, Melvin T" sort="Tyree, Melvin T" uniqKey="Tyree M" first="Melvin T" last="Tyree">Melvin T. Tyree</name><name sortKey="Zwiazek, Janusz J" sort="Zwiazek, Janusz J" uniqKey="Zwiazek J" first="Janusz J" last="Zwiazek">Janusz J. Zwiazek</name></noCountry></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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