Influence of nitrogen fertilization on xylem traits and aquaporin expression in stems of hybrid poplar.
Identifieur interne : 003215 ( Main/Exploration ); précédent : 003214; suivant : 003216Influence of nitrogen fertilization on xylem traits and aquaporin expression in stems of hybrid poplar.
Auteurs : Uwe G. Hacke [Canada] ; Lenka Plavcová ; Adriana Almeida-Rodriguez ; Susanne King-Jones ; Wenchun Zhou ; Janice E K. CookeSource :
- Tree physiology [ 0829-318X ] ; 2010.
Descripteurs français
- KwdFr :
- Aquaporines (génétique), Aquaporines (métabolisme), Azote (pharmacologie), Eau (métabolisme), Populus (effets des médicaments et des substances chimiques), Populus (génétique), Populus (métabolisme), Régulation de l'expression des gènes végétaux (effets des médicaments et des substances chimiques), Xylème (effets des médicaments et des substances chimiques), Xylème (physiologie).
- MESH :
- effets des médicaments et des substances chimiques : Populus, Régulation de l'expression des gènes végétaux, Xylème.
- génétique : Aquaporines, Populus.
- métabolisme : Aquaporines, Eau, Populus.
- pharmacologie : Azote.
- physiologie : Xylème.
English descriptors
- KwdEn :
- MESH :
- chemical , genetics : Aquaporins.
- chemical , metabolism : Aquaporins, Water.
- drug effects : Gene Expression Regulation, Plant, Populus, Xylem.
- genetics : Populus.
- metabolism : Populus.
- chemical , pharmacology : Nitrogen.
- physiology : Xylem.
Abstract
We studied the influence of nitrogen (N) on hydraulic traits and aquaporin (AQP) expression in the stem xylem of hybrid poplar saplings (Populus trichocarpa (Torr. & Gray) x deltoides Bartr. ex Marsh clone H11-11). Plants were grown in a controlled environment and were kept well watered throughout the experiments. Hydraulic measurements were done on basal and distal stem segments of plants receiving high N fertilization (high N plants) versus plants receiving only adequate N fertilization (adequate N plants). High N plants grew faster and exhibited more leaf area than adequate N controls. These morphological differences were paralleled by wider vessels and higher specific conductivities (K(S)) in high N plants. However, stems of high N plants were more vulnerable to xylem cavitation, at least in one of two experiments, and showed lower wood densities than stems of adequate N plants. Leaf area was strongly correlated with cross-sectional xylem area in both plant groups. Since higher K(S) in high N plants was accompanied by concomitant increases in leaf area, leaf-specific conductivities were similar in both plant groups. Influences of N on hydraulic traits were paralleled by changes in AQP expression. Seven AQPs were upregulated in the stem xylem of high N plants, five of which have been identified recently as water transporters. The enhanced growth of secondary xylem of high N plants has been shown to result from both increased cambial activity as well as increased cell size. We suggest that some of these water-transporting AQPs could play a role in xylogenesis, facilitating the influx of water into the zone of differentiating and maturing cells in secondary xylem, including expanding vessels.
DOI: 10.1093/treephys/tpq058
PubMed: 20610665
Affiliations:
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Hacke</name><affiliation wicri:level="1"><nlm:affiliation>Department of Renewable Resources, University of Alberta, Edmonton, AB, T6G 2E3, Canada. uwe.hacke@ualberta.ca</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Renewable Resources, University of Alberta, Edmonton, AB, T6G 2E3</wicri:regionArea><wicri:noRegion>T6G 2E3</wicri:noRegion></affiliation></author><author><name sortKey="Plavcova, Lenka" sort="Plavcova, Lenka" uniqKey="Plavcova L" first="Lenka" last="Plavcová">Lenka Plavcová</name></author><author><name sortKey="Almeida Rodriguez, Adriana" sort="Almeida Rodriguez, Adriana" uniqKey="Almeida Rodriguez A" first="Adriana" last="Almeida-Rodriguez">Adriana Almeida-Rodriguez</name></author><author><name sortKey="King Jones, Susanne" sort="King Jones, Susanne" uniqKey="King Jones S" first="Susanne" last="King-Jones">Susanne King-Jones</name></author><author><name sortKey="Zhou, Wenchun" sort="Zhou, Wenchun" uniqKey="Zhou W" first="Wenchun" last="Zhou">Wenchun Zhou</name></author><author><name sortKey="Cooke, Janice E K" sort="Cooke, Janice E K" uniqKey="Cooke J" first="Janice E K" last="Cooke">Janice E K. 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Cooke</name></author></analytic><series><title level="j">Tree physiology</title><idno type="ISSN">0829-318X</idno><imprint><date when="2010" type="published">2010</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aquaporins (genetics)</term><term>Aquaporins (metabolism)</term><term>Gene Expression Regulation, Plant (drug effects)</term><term>Nitrogen (pharmacology)</term><term>Populus (drug effects)</term><term>Populus (genetics)</term><term>Populus (metabolism)</term><term>Water (metabolism)</term><term>Xylem (drug effects)</term><term>Xylem (physiology)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Aquaporines (génétique)</term><term>Aquaporines (métabolisme)</term><term>Azote (pharmacologie)</term><term>Eau (métabolisme)</term><term>Populus (effets des médicaments et des substances chimiques)</term><term>Populus (génétique)</term><term>Populus (métabolisme)</term><term>Régulation de l'expression des gènes végétaux (effets des médicaments et des substances chimiques)</term><term>Xylème (effets des médicaments et des substances chimiques)</term><term>Xylème (physiologie)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="genetics" xml:lang="en"><term>Aquaporins</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Aquaporins</term><term>Water</term></keywords><keywords scheme="MESH" qualifier="drug effects" xml:lang="en"><term>Gene Expression Regulation, Plant</term><term>Populus</term><term>Xylem</term></keywords><keywords scheme="MESH" qualifier="effets des médicaments et des substances chimiques" xml:lang="fr"><term>Populus</term><term>Régulation de l'expression des gènes végétaux</term><term>Xylème</term></keywords><keywords scheme="MESH" qualifier="genetics" xml:lang="en"><term>Populus</term></keywords><keywords scheme="MESH" qualifier="génétique" xml:lang="fr"><term>Aquaporines</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Populus</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Aquaporines</term><term>Eau</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="pharmacologie" xml:lang="fr"><term>Azote</term></keywords><keywords scheme="MESH" type="chemical" qualifier="pharmacology" xml:lang="en"><term>Nitrogen</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Xylème</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Xylem</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We studied the influence of nitrogen (N) on hydraulic traits and aquaporin (AQP) expression in the stem xylem of hybrid poplar saplings (Populus trichocarpa (Torr. & Gray) x deltoides Bartr. ex Marsh clone H11-11). Plants were grown in a controlled environment and were kept well watered throughout the experiments. Hydraulic measurements were done on basal and distal stem segments of plants receiving high N fertilization (high N plants) versus plants receiving only adequate N fertilization (adequate N plants). High N plants grew faster and exhibited more leaf area than adequate N controls. These morphological differences were paralleled by wider vessels and higher specific conductivities (K(S)) in high N plants. However, stems of high N plants were more vulnerable to xylem cavitation, at least in one of two experiments, and showed lower wood densities than stems of adequate N plants. Leaf area was strongly correlated with cross-sectional xylem area in both plant groups. Since higher K(S) in high N plants was accompanied by concomitant increases in leaf area, leaf-specific conductivities were similar in both plant groups. Influences of N on hydraulic traits were paralleled by changes in AQP expression. Seven AQPs were upregulated in the stem xylem of high N plants, five of which have been identified recently as water transporters. The enhanced growth of secondary xylem of high N plants has been shown to result from both increased cambial activity as well as increased cell size. We suggest that some of these water-transporting AQPs could play a role in xylogenesis, facilitating the influx of water into the zone of differentiating and maturing cells in secondary xylem, including expanding vessels.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">20610665</PMID><DateCompleted><Year>2010</Year><Month>11</Month><Day>16</Day></DateCompleted><DateRevised><Year>2013</Year><Month>11</Month><Day>21</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Print">0829-318X</ISSN><JournalIssue CitedMedium="Print"><Volume>30</Volume><Issue>8</Issue><PubDate><Year>2010</Year><Month>Aug</Month></PubDate></JournalIssue><Title>Tree physiology</Title><ISOAbbreviation>Tree Physiol</ISOAbbreviation></Journal><ArticleTitle>Influence of nitrogen fertilization on xylem traits and aquaporin expression in stems of hybrid poplar.</ArticleTitle><Pagination><MedlinePgn>1016-25</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1093/treephys/tpq058</ELocationID><Abstract><AbstractText>We studied the influence of nitrogen (N) on hydraulic traits and aquaporin (AQP) expression in the stem xylem of hybrid poplar saplings (Populus trichocarpa (Torr. & Gray) x deltoides Bartr. ex Marsh clone H11-11). Plants were grown in a controlled environment and were kept well watered throughout the experiments. Hydraulic measurements were done on basal and distal stem segments of plants receiving high N fertilization (high N plants) versus plants receiving only adequate N fertilization (adequate N plants). High N plants grew faster and exhibited more leaf area than adequate N controls. These morphological differences were paralleled by wider vessels and higher specific conductivities (K(S)) in high N plants. However, stems of high N plants were more vulnerable to xylem cavitation, at least in one of two experiments, and showed lower wood densities than stems of adequate N plants. Leaf area was strongly correlated with cross-sectional xylem area in both plant groups. Since higher K(S) in high N plants was accompanied by concomitant increases in leaf area, leaf-specific conductivities were similar in both plant groups. Influences of N on hydraulic traits were paralleled by changes in AQP expression. Seven AQPs were upregulated in the stem xylem of high N plants, five of which have been identified recently as water transporters. The enhanced growth of secondary xylem of high N plants has been shown to result from both increased cambial activity as well as increased cell size. We suggest that some of these water-transporting AQPs could play a role in xylogenesis, facilitating the influx of water into the zone of differentiating and maturing cells in secondary xylem, including expanding vessels.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Hacke</LastName><ForeName>Uwe G</ForeName><Initials>UG</Initials><AffiliationInfo><Affiliation>Department of Renewable Resources, University of Alberta, Edmonton, AB, T6G 2E3, Canada. uwe.hacke@ualberta.ca</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Plavcová</LastName><ForeName>Lenka</ForeName><Initials>L</Initials></Author><Author ValidYN="Y"><LastName>Almeida-Rodriguez</LastName><ForeName>Adriana</ForeName><Initials>A</Initials></Author><Author ValidYN="Y"><LastName>King-Jones</LastName><ForeName>Susanne</ForeName><Initials>S</Initials></Author><Author ValidYN="Y"><LastName>Zhou</LastName><ForeName>Wenchun</ForeName><Initials>W</Initials></Author><Author ValidYN="Y"><LastName>Cooke</LastName><ForeName>Janice E K</ForeName><Initials>JE</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType><PublicationType UI="D013486">Research Support, U.S. Gov't, Non-P.H.S.</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2010</Year><Month>07</Month><Day>07</Day></ArticleDate></Article><MedlineJournalInfo><Country>Canada</Country><MedlineTA>Tree Physiol</MedlineTA><NlmUniqueID>100955338</NlmUniqueID><ISSNLinking>0829-318X</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D020346">Aquaporins</NameOfSubstance></Chemical><Chemical><RegistryNumber>059QF0KO0R</RegistryNumber><NameOfSubstance UI="D014867">Water</NameOfSubstance></Chemical><Chemical><RegistryNumber>N762921K75</RegistryNumber><NameOfSubstance UI="D009584">Nitrogen</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D020346" MajorTopicYN="N">Aquaporins</DescriptorName><QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018506" MajorTopicYN="N">Gene Expression Regulation, Plant</DescriptorName><QualifierName UI="Q000187" MajorTopicYN="Y">drug effects</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D009584" MajorTopicYN="N">Nitrogen</DescriptorName><QualifierName UI="Q000494" MajorTopicYN="Y">pharmacology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName><QualifierName UI="Q000187" MajorTopicYN="Y">drug effects</QualifierName><QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></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="Q000187" MajorTopicYN="N">drug effects</QualifierName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2010</Year><Month>7</Month><Day>9</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2010</Year><Month>7</Month><Day>9</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2010</Year><Month>11</Month><Day>17</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">20610665</ArticleId><ArticleId IdType="pii">tpq058</ArticleId><ArticleId IdType="doi">10.1093/treephys/tpq058</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Canada</li></country></list><tree><noCountry><name sortKey="Almeida Rodriguez, Adriana" sort="Almeida Rodriguez, Adriana" uniqKey="Almeida Rodriguez A" first="Adriana" last="Almeida-Rodriguez">Adriana Almeida-Rodriguez</name><name sortKey="Cooke, Janice E K" sort="Cooke, Janice E K" uniqKey="Cooke J" first="Janice E K" last="Cooke">Janice E K. Cooke</name><name sortKey="King Jones, Susanne" sort="King Jones, Susanne" uniqKey="King Jones S" first="Susanne" last="King-Jones">Susanne King-Jones</name><name sortKey="Plavcova, Lenka" sort="Plavcova, Lenka" uniqKey="Plavcova L" first="Lenka" last="Plavcová">Lenka Plavcová</name><name sortKey="Zhou, Wenchun" sort="Zhou, Wenchun" uniqKey="Zhou W" first="Wenchun" last="Zhou">Wenchun Zhou</name></noCountry><country name="Canada"><noRegion><name sortKey="Hacke, Uwe G" sort="Hacke, Uwe G" uniqKey="Hacke U" first="Uwe G" last="Hacke">Uwe G. Hacke</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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