Nitrogen and potassium effects on xylem cavitation and water-use efficiency in poplars.
Identifieur interne : 004874 ( Main/Exploration ); précédent : 004873; suivant : 004875Nitrogen and potassium effects on xylem cavitation and water-use efficiency in poplars.
Auteurs : H. P. Harvey [Canada] ; R. Van Den DriesscheSource :
- Tree physiology [ 1758-4469 ] ; 1999.
Abstract
Effects of N and K nutrition on drought and cavitation resistance were examined in six greenhouse-grown poplar clones: Populus trichocarpa (Torr. & Gray) and its hybrids with P. deltoides Bartr. and P. euramericana (Dole) Guinier, before and after preconditioning to water stress. Both tendency to cavitate and water-use efficiency (WUE) increased when N supply was increased, whereas K supply had little impact on cavitation. Mean xylem vessel diameters increased from 36.6 &mgr;m at low-N supply to 45.2 &mgr;m at high-N supply. Drought-hardy clones, which were relatively resistant to cavitation, had the smallest mean vessel diameters. Vulnerability to cavitation had a weakly positive relationship with vessel diameter, and a negative correlation with transpiration. Drought hardening offered no protection against cavitation in a subsequent drought. Under drought conditions, increasing N supply increased leaf loss and decreased water potentials, whereas increasing K supply decreased leaf loss. Drought-resistant clones exhibited similar WUE to drought-susceptible clones, but had smaller, more numerous stomata and greater leaf retention under drought conditions.
DOI: 10.1093/treephys/19.14.943
PubMed: 12651306
Affiliations:
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Van Den Driessche</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="1999">1999</date><idno type="RBID">pubmed:12651306</idno><idno type="pmid">12651306</idno><idno type="doi">10.1093/treephys/19.14.943</idno><idno type="wicri:Area/Main/Corpus">004524</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">004524</idno><idno type="wicri:Area/Main/Curation">004524</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">004524</idno><idno type="wicri:Area/Main/Exploration">004524</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Nitrogen and potassium effects on xylem cavitation and water-use efficiency in poplars.</title><author><name sortKey="Harvey, H P" sort="Harvey, H P" uniqKey="Harvey H" first="H. P." last="Harvey">H. P. Harvey</name><affiliation wicri:level="1"><nlm:affiliation>Centre for Forest Biology, University of Victoria, P.O. Box 1700, Victoria, B.C. V8W 2Y2, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Centre for Forest Biology, University of Victoria, P.O. Box 1700, Victoria, B.C. V8W 2Y2</wicri:regionArea><wicri:noRegion>B.C. V8W 2Y2</wicri:noRegion></affiliation></author><author><name sortKey="Van Den Driessche, R" sort="Van Den Driessche, R" uniqKey="Van Den Driessche R" first="R." last="Van Den Driessche">R. Van Den Driessche</name></author></analytic><series><title level="j">Tree physiology</title><idno type="eISSN">1758-4469</idno><imprint><date when="1999" type="published">1999</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Effects of N and K nutrition on drought and cavitation resistance were examined in six greenhouse-grown poplar clones: Populus trichocarpa (Torr. & Gray) and its hybrids with P. deltoides Bartr. and P. euramericana (Dole) Guinier, before and after preconditioning to water stress. Both tendency to cavitate and water-use efficiency (WUE) increased when N supply was increased, whereas K supply had little impact on cavitation. Mean xylem vessel diameters increased from 36.6 &mgr;m at low-N supply to 45.2 &mgr;m at high-N supply. Drought-hardy clones, which were relatively resistant to cavitation, had the smallest mean vessel diameters. Vulnerability to cavitation had a weakly positive relationship with vessel diameter, and a negative correlation with transpiration. Drought hardening offered no protection against cavitation in a subsequent drought. Under drought conditions, increasing N supply increased leaf loss and decreased water potentials, whereas increasing K supply decreased leaf loss. Drought-resistant clones exhibited similar WUE to drought-susceptible clones, but had smaller, more numerous stomata and greater leaf retention under drought conditions.</div></front></TEI><pubmed><MedlineCitation Status="PubMed-not-MEDLINE" Owner="NLM"><PMID Version="1">12651306</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>19</Volume><Issue>14</Issue><PubDate><Year>1999</Year><Month>Dec</Month></PubDate></JournalIssue><Title>Tree physiology</Title><ISOAbbreviation>Tree Physiol</ISOAbbreviation></Journal><ArticleTitle>Nitrogen and potassium effects on xylem cavitation and water-use efficiency in poplars.</ArticleTitle><Pagination><MedlinePgn>943-950</MedlinePgn></Pagination><Abstract><AbstractText>Effects of N and K nutrition on drought and cavitation resistance were examined in six greenhouse-grown poplar clones: Populus trichocarpa (Torr. & Gray) and its hybrids with P. deltoides Bartr. and P. euramericana (Dole) Guinier, before and after preconditioning to water stress. Both tendency to cavitate and water-use efficiency (WUE) increased when N supply was increased, whereas K supply had little impact on cavitation. Mean xylem vessel diameters increased from 36.6 &mgr;m at low-N supply to 45.2 &mgr;m at high-N supply. Drought-hardy clones, which were relatively resistant to cavitation, had the smallest mean vessel diameters. Vulnerability to cavitation had a weakly positive relationship with vessel diameter, and a negative correlation with transpiration. Drought hardening offered no protection against cavitation in a subsequent drought. Under drought conditions, increasing N supply increased leaf loss and decreased water potentials, whereas increasing K supply decreased leaf loss. 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V8W 2Y2, Canada.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Van Den Driessche</LastName><ForeName>R.</ForeName><Initials>R</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>2003</Year><Month>3</Month><Day>26</Day><Hour>4</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2003</Year><Month>3</Month><Day>26</Day><Hour>4</Hour><Minute>1</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2003</Year><Month>3</Month><Day>26</Day><Hour>4</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">12651306</ArticleId><ArticleId IdType="doi">10.1093/treephys/19.14.943</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Canada</li></country></list><tree><noCountry><name sortKey="Van Den Driessche, R" sort="Van Den Driessche, R" uniqKey="Van Den Driessche R" first="R." last="Van Den Driessche">R. Van Den Driessche</name></noCountry><country name="Canada"><noRegion><name sortKey="Harvey, H P" sort="Harvey, H P" uniqKey="Harvey H" first="H. P." last="Harvey">H. P. Harvey</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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