Loss of hydraulic conductivity due to water stress in intact juveniles of Quercus rubra and Populus deltoides.
Identifieur interne : 004C15 ( Main/Exploration ); précédent : 004C14; suivant : 004C16Loss of hydraulic conductivity due to water stress in intact juveniles of Quercus rubra and Populus deltoides.
Auteurs : M T Tyree [États-Unis] ; J. Alexander ; J L MachadoSource :
- Tree physiology [ 1758-4469 ] ; 1992.
Abstract
Despite many studies of the percent loss of hydraulic conductivity in excised branches, there is doubt as to whether cutting stems in air introduces unnatural embolism into the xylem at the cut surface. To address this question, hydraulic conductivity was measured in seedlings of northern red oak (Quercus rubra L.) and rooted scions of eastern cottonwood (Populus deltoides Bartr. ex Marsh.) that had been droughted in pots. Results indicate that in situ dehydration produced a very similar vulnerability curve (% loss of conductivity versus water potential) to those previously obtained by bench-top dehydration of excised branches of eastern cottonwood and red oak. In eastern cottonwood cuttings, conductivity loss increased sharply below water potentials of -1.0 MPa, with 100% loss of conductivity occurring by -2.0 MPa, whereas conductivity loss in red oak seedlings was more gradual, i.e., increasing below -1.5 MPa and sustaining 100% loss of conductivity by about -4.0 MPa.
DOI: 10.1093/treephys/10.4.411
PubMed: 14969978
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Alexander</name></author><author><name sortKey="Machado, J L" sort="Machado, J L" uniqKey="Machado J" first="J L" last="Machado">J L Machado</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="1992">1992</date><idno type="RBID">pubmed:14969978</idno><idno type="pmid">14969978</idno><idno type="doi">10.1093/treephys/10.4.411</idno><idno type="wicri:Area/Main/Corpus">004C12</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">004C12</idno><idno type="wicri:Area/Main/Curation">004C12</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">004C12</idno><idno type="wicri:Area/Main/Exploration">004C12</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Loss of hydraulic conductivity due to water stress in intact juveniles of Quercus rubra and Populus deltoides.</title><author><name sortKey="Tyree, M T" sort="Tyree, M T" uniqKey="Tyree M" first="M T" last="Tyree">M T Tyree</name><affiliation wicri:level="2"><nlm:affiliation>Northeastern Forest Experiment Station, P.O. Box 968, Burlington, VT 05402, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Northeastern Forest Experiment Station, P.O. Box 968, Burlington, VT 05402</wicri:regionArea><placeName><region type="state">Vermont</region></placeName></affiliation></author><author><name sortKey="Alexander, J" sort="Alexander, J" uniqKey="Alexander J" first="J" last="Alexander">J. Alexander</name></author><author><name sortKey="Machado, J L" sort="Machado, J L" uniqKey="Machado J" first="J L" last="Machado">J L Machado</name></author></analytic><series><title level="j">Tree physiology</title><idno type="eISSN">1758-4469</idno><imprint><date when="1992" type="published">1992</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Despite many studies of the percent loss of hydraulic conductivity in excised branches, there is doubt as to whether cutting stems in air introduces unnatural embolism into the xylem at the cut surface. To address this question, hydraulic conductivity was measured in seedlings of northern red oak (Quercus rubra L.) and rooted scions of eastern cottonwood (Populus deltoides Bartr. ex Marsh.) that had been droughted in pots. Results indicate that in situ dehydration produced a very similar vulnerability curve (% loss of conductivity versus water potential) to those previously obtained by bench-top dehydration of excised branches of eastern cottonwood and red oak. In eastern cottonwood cuttings, conductivity loss increased sharply below water potentials of -1.0 MPa, with 100% loss of conductivity occurring by -2.0 MPa, whereas conductivity loss in red oak seedlings was more gradual, i.e., increasing below -1.5 MPa and sustaining 100% loss of conductivity by about -4.0 MPa.</div></front></TEI><pubmed><MedlineCitation Status="PubMed-not-MEDLINE" Owner="NLM"><PMID Version="1">14969978</PMID><DateRevised><Year>2019</Year><Month>11</Month><Day>20</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Electronic">1758-4469</ISSN><JournalIssue CitedMedium="Internet"><Volume>10</Volume><Issue>4</Issue><PubDate><Year>1992</Year><Month>Jun</Month></PubDate></JournalIssue><Title>Tree physiology</Title><ISOAbbreviation>Tree Physiol</ISOAbbreviation></Journal><ArticleTitle>Loss of hydraulic conductivity due to water stress in intact juveniles of Quercus rubra and Populus deltoides.</ArticleTitle><Pagination><MedlinePgn>411-5</MedlinePgn></Pagination><Abstract><AbstractText>Despite many studies of the percent loss of hydraulic conductivity in excised branches, there is doubt as to whether cutting stems in air introduces unnatural embolism into the xylem at the cut surface. To address this question, hydraulic conductivity was measured in seedlings of northern red oak (Quercus rubra L.) and rooted scions of eastern cottonwood (Populus deltoides Bartr. ex Marsh.) that had been droughted in pots. Results indicate that in situ dehydration produced a very similar vulnerability curve (% loss of conductivity versus water potential) to those previously obtained by bench-top dehydration of excised branches of eastern cottonwood and red oak. In eastern cottonwood cuttings, conductivity loss increased sharply below water potentials of -1.0 MPa, with 100% loss of conductivity occurring by -2.0 MPa, whereas conductivity loss in red oak seedlings was more gradual, i.e., increasing below -1.5 MPa and sustaining 100% loss of conductivity by about -4.0 MPa.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Tyree</LastName><ForeName>M T</ForeName><Initials>MT</Initials><AffiliationInfo><Affiliation>Northeastern Forest Experiment Station, P.O. Box 968, Burlington, VT 05402, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Alexander</LastName><ForeName>J</ForeName><Initials>J</Initials></Author><Author ValidYN="Y"><LastName>Machado</LastName><ForeName>J L</ForeName><Initials>JL</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>Canada</Country><MedlineTA>Tree Physiol</MedlineTA><NlmUniqueID>100955338</NlmUniqueID><ISSNLinking>0829-318X</ISSNLinking></MedlineJournalInfo></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="pubmed"><Year>1992</Year><Month>6</Month><Day>1</Day><Hour>0</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>1992</Year><Month>6</Month><Day>1</Day><Hour>0</Hour><Minute>1</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>1992</Year><Month>6</Month><Day>1</Day><Hour>0</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">14969978</ArticleId><ArticleId IdType="doi">10.1093/treephys/10.4.411</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>États-Unis</li></country><region><li>Vermont</li></region></list><tree><noCountry><name sortKey="Alexander, J" sort="Alexander, J" uniqKey="Alexander J" first="J" last="Alexander">J. Alexander</name><name sortKey="Machado, J L" sort="Machado, J L" uniqKey="Machado J" first="J L" last="Machado">J L Machado</name></noCountry><country name="États-Unis"><region name="Vermont"><name sortKey="Tyree, M T" sort="Tyree, M T" uniqKey="Tyree M" first="M T" last="Tyree">M T Tyree</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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