Water flux in a hybrid poplar stand.
Identifieur interne : 004B07 ( Main/Exploration ); précédent : 004B06; suivant : 004B08Water flux in a hybrid poplar stand.
Auteurs : T. M. Hinckley [États-Unis] ; J. R. Brooks ; J. Cermák ; R. Ceulemans ; J. Kucera ; F. C. Meinzer ; D. A. RobertsSource :
- Tree physiology [ 1758-4469 ]
Abstract
We studied water flux in a four-year-old stand of hybrid Populus during midsummer 1992. Study trees ranged in height from 11.0 to 15.1 m and in diameter from 8.3 to 15.1 cm. The large-leafed Populus hybrid was relatively poorly coupled to the atmosphere. The average value of the stomatal decoupling coefficient, Omega, was 0.66, indicating that, on average, a 10% change in stomatal conductance would result in only a 3 to 4% change in transpiration. During the middle of the summer, the smallest study tree used between 20 and 26 kg of water per day, whereas the largest tree used between 39 and 51 kg day(-1). The maximum observed rate of stand water loss was 4.8 mm day(-1) in this Populus clone. Maximum rates of sap velocity within the xylem were as high as 12.5 m h(-1); measured rates for exposed sunlit branches approached 90% of this maximum. Within-canopy patterns of stomatal conductance generally reflected patterns of incident radiation. Stomatal conductance of foliage grown in shade, even when exposed to non-limiting light and water source conditions, did not increase appreciably. Patterns of stomatal conductance under limiting and non-limiting conditions suggested that both stomatal conductance and leaf specific hydraulic conductivity (LSHC) were linked with the ability to exploit the light resource.
DOI: 10.1093/treephys/14.7-8-9.1005
PubMed: 14967666
Affiliations:
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Cermák</name></author><author><name sortKey="Ceulemans, R" sort="Ceulemans, R" uniqKey="Ceulemans R" first="R." last="Ceulemans">R. Ceulemans</name></author><author><name sortKey="Kucera, J" sort="Kucera, J" uniqKey="Kucera J" first="J." last="Kucera">J. Kucera</name></author><author><name sortKey="Meinzer, F C" sort="Meinzer, F C" uniqKey="Meinzer F" first="F. C." last="Meinzer">F. C. Meinzer</name></author><author><name sortKey="Roberts, D A" sort="Roberts, D A" uniqKey="Roberts D" first="D. A." last="Roberts">D. A. Roberts</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="1994">1994 Jul-Sep</date><idno type="RBID">pubmed:14967666</idno><idno type="pmid">14967666</idno><idno type="doi">10.1093/treephys/14.7-8-9.1005</idno><idno type="wicri:Area/Main/Corpus">004B30</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">004B30</idno><idno type="wicri:Area/Main/Curation">004B30</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">004B30</idno><idno type="wicri:Area/Main/Exploration">004B30</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Water flux in a hybrid poplar stand.</title><author><name sortKey="Hinckley, T M" sort="Hinckley, T M" uniqKey="Hinckley T" first="T. M." last="Hinckley">T. M. Hinckley</name><affiliation wicri:level="4"><nlm:affiliation>College of Forest Resources, AR-10, University of Washington, Seattle, WA 98195, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>College of Forest Resources, AR-10, University of Washington, Seattle, WA 98195</wicri:regionArea><placeName><region type="state">Washington (État)</region><settlement type="city">Seattle</settlement></placeName><orgName type="university">Université de Washington</orgName></affiliation></author><author><name sortKey="Brooks, J R" sort="Brooks, J R" uniqKey="Brooks J" first="J. R." last="Brooks">J. R. Brooks</name></author><author><name sortKey="Cermak, J" sort="Cermak, J" uniqKey="Cermak J" first="J." last="Cermák">J. Cermák</name></author><author><name sortKey="Ceulemans, R" sort="Ceulemans, R" uniqKey="Ceulemans R" first="R." last="Ceulemans">R. Ceulemans</name></author><author><name sortKey="Kucera, J" sort="Kucera, J" uniqKey="Kucera J" first="J." last="Kucera">J. Kucera</name></author><author><name sortKey="Meinzer, F C" sort="Meinzer, F C" uniqKey="Meinzer F" first="F. C." last="Meinzer">F. C. Meinzer</name></author><author><name sortKey="Roberts, D A" sort="Roberts, D A" uniqKey="Roberts D" first="D. A." last="Roberts">D. A. Roberts</name></author></analytic><series><title level="j">Tree physiology</title><idno type="eISSN">1758-4469</idno></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We studied water flux in a four-year-old stand of hybrid Populus during midsummer 1992. Study trees ranged in height from 11.0 to 15.1 m and in diameter from 8.3 to 15.1 cm. The large-leafed Populus hybrid was relatively poorly coupled to the atmosphere. The average value of the stomatal decoupling coefficient, Omega, was 0.66, indicating that, on average, a 10% change in stomatal conductance would result in only a 3 to 4% change in transpiration. During the middle of the summer, the smallest study tree used between 20 and 26 kg of water per day, whereas the largest tree used between 39 and 51 kg day(-1). The maximum observed rate of stand water loss was 4.8 mm day(-1) in this Populus clone. Maximum rates of sap velocity within the xylem were as high as 12.5 m h(-1); measured rates for exposed sunlit branches approached 90% of this maximum. Within-canopy patterns of stomatal conductance generally reflected patterns of incident radiation. Stomatal conductance of foliage grown in shade, even when exposed to non-limiting light and water source conditions, did not increase appreciably. Patterns of stomatal conductance under limiting and non-limiting conditions suggested that both stomatal conductance and leaf specific hydraulic conductivity (LSHC) were linked with the ability to exploit the light resource.</div></front></TEI><pubmed><MedlineCitation Status="PubMed-not-MEDLINE" Owner="NLM"><PMID Version="1">14967666</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>14</Volume><Issue>7_9</Issue><PubDate><MedlineDate>1994 Jul-Sep</MedlineDate></PubDate></JournalIssue><Title>Tree physiology</Title><ISOAbbreviation>Tree Physiol</ISOAbbreviation></Journal><ArticleTitle>Water flux in a hybrid poplar stand.</ArticleTitle><Pagination><MedlinePgn>1005-1018</MedlinePgn></Pagination><Abstract><AbstractText>We studied water flux in a four-year-old stand of hybrid Populus during midsummer 1992. Study trees ranged in height from 11.0 to 15.1 m and in diameter from 8.3 to 15.1 cm. The large-leafed Populus hybrid was relatively poorly coupled to the atmosphere. The average value of the stomatal decoupling coefficient, Omega, was 0.66, indicating that, on average, a 10% change in stomatal conductance would result in only a 3 to 4% change in transpiration. During the middle of the summer, the smallest study tree used between 20 and 26 kg of water per day, whereas the largest tree used between 39 and 51 kg day(-1). The maximum observed rate of stand water loss was 4.8 mm day(-1) in this Populus clone. Maximum rates of sap velocity within the xylem were as high as 12.5 m h(-1); measured rates for exposed sunlit branches approached 90% of this maximum. Within-canopy patterns of stomatal conductance generally reflected patterns of incident radiation. Stomatal conductance of foliage grown in shade, even when exposed to non-limiting light and water source conditions, did not increase appreciably. Patterns of stomatal conductance under limiting and non-limiting conditions suggested that both stomatal conductance and leaf specific hydraulic conductivity (LSHC) were linked with the ability to exploit the light resource.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Hinckley</LastName><ForeName>T. M.</ForeName><Initials>TM</Initials><AffiliationInfo><Affiliation>College of Forest Resources, AR-10, University of Washington, Seattle, WA 98195, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Brooks</LastName><ForeName>J. R.</ForeName><Initials>JR</Initials></Author><Author ValidYN="Y"><LastName>Cermák</LastName><ForeName>J.</ForeName><Initials>J</Initials></Author><Author ValidYN="Y"><LastName>Ceulemans</LastName><ForeName>R.</ForeName><Initials>R</Initials></Author><Author ValidYN="Y"><LastName>Kucera</LastName><ForeName>J.</ForeName><Initials>J</Initials></Author><Author ValidYN="Y"><LastName>Meinzer</LastName><ForeName>F. C.</ForeName><Initials>FC</Initials></Author><Author ValidYN="Y"><LastName>Roberts</LastName><ForeName>D. A.</ForeName><Initials>DA</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>1994</Year><Month>7</Month><Day>1</Day><Hour>0</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>1994</Year><Month>7</Month><Day>1</Day><Hour>0</Hour><Minute>1</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>1994</Year><Month>7</Month><Day>1</Day><Hour>0</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">14967666</ArticleId><ArticleId IdType="doi">10.1093/treephys/14.7-8-9.1005</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>États-Unis</li></country><region><li>Washington (État)</li></region><settlement><li>Seattle</li></settlement><orgName><li>Université de Washington</li></orgName></list><tree><noCountry><name sortKey="Brooks, J R" sort="Brooks, J R" uniqKey="Brooks J" first="J. R." last="Brooks">J. R. Brooks</name><name sortKey="Cermak, J" sort="Cermak, J" uniqKey="Cermak J" first="J." last="Cermák">J. Cermák</name><name sortKey="Ceulemans, R" sort="Ceulemans, R" uniqKey="Ceulemans R" first="R." last="Ceulemans">R. Ceulemans</name><name sortKey="Kucera, J" sort="Kucera, J" uniqKey="Kucera J" first="J." last="Kucera">J. Kucera</name><name sortKey="Meinzer, F C" sort="Meinzer, F C" uniqKey="Meinzer F" first="F. C." last="Meinzer">F. C. Meinzer</name><name sortKey="Roberts, D A" sort="Roberts, D A" uniqKey="Roberts D" first="D. A." last="Roberts">D. A. Roberts</name></noCountry><country name="États-Unis"><region name="Washington (État)"><name sortKey="Hinckley, T M" sort="Hinckley, T M" uniqKey="Hinckley T" first="T. M." last="Hinckley">T. M. Hinckley</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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