Partitioning of nitrate assimilation among leaves, stems and roots of poplar.
Identifieur interne : 004547 ( Main/Exploration ); précédent : 004546; suivant : 004548Partitioning of nitrate assimilation among leaves, stems and roots of poplar.
Auteurs : Brent L. Black [États-Unis] ; Leslie H. Fuchigami ; Gary D. ColemanSource :
- Tree physiology [ 0829-318X ] ; 2002.
Descripteurs français
- KwdFr :
- Arbres (composition chimique), Arbres (métabolisme), Arbres (physiologie), Feuilles de plante (composition chimique), Feuilles de plante (enzymologie), Nitrate reductase (MeSH), Nitrate reductases (métabolisme), Nitrates (analyse), Nitrates (métabolisme), Nitrates (physiologie), Populus (composition chimique), Populus (métabolisme), Populus (physiologie), Racines de plante (composition chimique), Racines de plante (enzymologie), Tiges de plante (composition chimique), Tiges de plante (enzymologie).
- MESH :
- analyse : Nitrates.
- composition chimique : Arbres, Feuilles de plante, Populus, Racines de plante, Tiges de plante.
- enzymologie : Feuilles de plante, Racines de plante, Tiges de plante.
- métabolisme : Arbres, Nitrate reductases, Nitrates, Populus.
- physiologie : Arbres, Nitrates, Populus.
- Nitrate reductase.
English descriptors
- KwdEn :
- Nitrate Reductase (MeSH), Nitrate Reductases (metabolism), Nitrates (analysis), Nitrates (metabolism), Nitrates (physiology), Plant Leaves (chemistry), Plant Leaves (enzymology), Plant Roots (chemistry), Plant Roots (enzymology), Plant Stems (chemistry), Plant Stems (enzymology), Populus (chemistry), Populus (metabolism), Populus (physiology), Trees (chemistry), Trees (metabolism), Trees (physiology).
- MESH :
- chemical , analysis : Nitrates.
- chemical , metabolism : Nitrate Reductases, Nitrates.
- chemical , physiology : Nitrates.
- chemical : Nitrate Reductase.
- chemistry : Plant Leaves, Plant Roots, Plant Stems, Populus, Trees.
- enzymology : Plant Leaves, Plant Roots, Plant Stems.
- metabolism : Populus, Trees.
- physiology : Populus, Trees.
Abstract
Plants differ in tissue localization of nitrate reduction and assimilation. Some species reduce nitrate primarily in the leaves, whereas other species localize nitrate reduction and assimilation in the roots. We determined how nitrate assimilation is partitioned among leaves, stems and roots of poplar (Populus tremula L. x P. alba L.) by comparing tissue differences in in vivo nitrate reductase activity (NRA), nitrate reductase abundance and tissue nitrate concentration. Compared with stems or roots, NRA was greater in leaves, and the highest leaf NRA was found in young leaves. Leaf and root NRA increased with increasing nitrate supply, whereas stem NRA remained constant. Leaf NRA was at least 10-fold greater than root NRA at all external nitrate concentrations. Nitrate reductase abundance increased in all tissues with increasing nitrate availability, and nitrate reductase abundance was at least 10-fold greater in leaves than in stems or roots at all nitrate availabilities. Tissue nitrate concentration increased with increasing nitrate supply and was greater in roots than in stems and leaves. Photoperiod influenced NRA, with leaf NRA declining in nitrate-fertilized plants with short daily photoperiods (8-h). We conclude that different tissues of poplar vary in nitrate assimilation with little nitrate assimilation occurring in roots and the most nitrate assimilation taking place in leaves.
DOI: 10.1093/treephys/22.10.717
PubMed: 12091153
Affiliations:
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Fuchigami</name></author><author><name sortKey="Coleman, Gary D" sort="Coleman, Gary D" uniqKey="Coleman G" first="Gary D" last="Coleman">Gary D. 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Black</name><affiliation wicri:level="2"><nlm:affiliation>Fruit Laboratory, Agriculture Research Service, United States Department of Agriculture, Beltsville, MD 20705, USA.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Fruit Laboratory, Agriculture Research Service, United States Department of Agriculture, Beltsville, MD 20705</wicri:regionArea><placeName><region type="state">Maryland</region></placeName></affiliation></author><author><name sortKey="Fuchigami, Leslie H" sort="Fuchigami, Leslie H" uniqKey="Fuchigami L" first="Leslie H" last="Fuchigami">Leslie H. Fuchigami</name></author><author><name sortKey="Coleman, Gary D" sort="Coleman, Gary D" uniqKey="Coleman G" first="Gary D" last="Coleman">Gary D. 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Some species reduce nitrate primarily in the leaves, whereas other species localize nitrate reduction and assimilation in the roots. We determined how nitrate assimilation is partitioned among leaves, stems and roots of poplar (Populus tremula L. x P. alba L.) by comparing tissue differences in in vivo nitrate reductase activity (NRA), nitrate reductase abundance and tissue nitrate concentration. Compared with stems or roots, NRA was greater in leaves, and the highest leaf NRA was found in young leaves. Leaf and root NRA increased with increasing nitrate supply, whereas stem NRA remained constant. Leaf NRA was at least 10-fold greater than root NRA at all external nitrate concentrations. Nitrate reductase abundance increased in all tissues with increasing nitrate availability, and nitrate reductase abundance was at least 10-fold greater in leaves than in stems or roots at all nitrate availabilities. Tissue nitrate concentration increased with increasing nitrate supply and was greater in roots than in stems and leaves. Photoperiod influenced NRA, with leaf NRA declining in nitrate-fertilized plants with short daily photoperiods (8-h). We conclude that different tissues of poplar vary in nitrate assimilation with little nitrate assimilation occurring in roots and the most nitrate assimilation taking place in leaves.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">12091153</PMID><DateCompleted><Year>2003</Year><Month>03</Month><Day>26</Day></DateCompleted><DateRevised><Year>2019</Year><Month>05</Month><Day>13</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0829-318X</ISSN><JournalIssue CitedMedium="Print"><Volume>22</Volume><Issue>10</Issue><PubDate><Year>2002</Year><Month>Jul</Month></PubDate></JournalIssue><Title>Tree physiology</Title><ISOAbbreviation>Tree Physiol</ISOAbbreviation></Journal><ArticleTitle>Partitioning of nitrate assimilation among leaves, stems and roots of poplar.</ArticleTitle><Pagination><MedlinePgn>717-24</MedlinePgn></Pagination><Abstract><AbstractText>Plants differ in tissue localization of nitrate reduction and assimilation. Some species reduce nitrate primarily in the leaves, whereas other species localize nitrate reduction and assimilation in the roots. We determined how nitrate assimilation is partitioned among leaves, stems and roots of poplar (Populus tremula L. x P. alba L.) by comparing tissue differences in in vivo nitrate reductase activity (NRA), nitrate reductase abundance and tissue nitrate concentration. Compared with stems or roots, NRA was greater in leaves, and the highest leaf NRA was found in young leaves. Leaf and root NRA increased with increasing nitrate supply, whereas stem NRA remained constant. Leaf NRA was at least 10-fold greater than root NRA at all external nitrate concentrations. Nitrate reductase abundance increased in all tissues with increasing nitrate availability, and nitrate reductase abundance was at least 10-fold greater in leaves than in stems or roots at all nitrate availabilities. Tissue nitrate concentration increased with increasing nitrate supply and was greater in roots than in stems and leaves. Photoperiod influenced NRA, with leaf NRA declining in nitrate-fertilized plants with short daily photoperiods (8-h). We conclude that different tissues of poplar vary in nitrate assimilation with little nitrate assimilation occurring in roots and the most nitrate assimilation taking place in leaves.</AbstractText><CopyrightInformation>2002 Heron Publishing--Victoria, Canada</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Black</LastName><ForeName>Brent L</ForeName><Initials>BL</Initials><AffiliationInfo><Affiliation>Fruit Laboratory, Agriculture Research Service, United States Department of Agriculture, Beltsville, MD 20705, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Fuchigami</LastName><ForeName>Leslie H</ForeName><Initials>LH</Initials></Author><Author ValidYN="Y"><LastName>Coleman</LastName><ForeName>Gary D</ForeName><Initials>GD</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></Article><MedlineJournalInfo><Country>Canada</Country><MedlineTA>Tree Physiol</MedlineTA><NlmUniqueID>100955338</NlmUniqueID><ISSNLinking>0829-318X</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D009566">Nitrates</NameOfSubstance></Chemical><Chemical><RegistryNumber>EC 1.7.-</RegistryNumber><NameOfSubstance UI="D009565">Nitrate Reductases</NameOfSubstance></Chemical><Chemical><RegistryNumber>EC 1.7.99.4</RegistryNumber><NameOfSubstance UI="D050901">Nitrate Reductase</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D050901" MajorTopicYN="N">Nitrate Reductase</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D009565" MajorTopicYN="N">Nitrate Reductases</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D009566" MajorTopicYN="N">Nitrates</DescriptorName><QualifierName UI="Q000032" MajorTopicYN="Y">analysis</QualifierName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018515" MajorTopicYN="N">Plant Leaves</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName><QualifierName UI="Q000201" MajorTopicYN="N">enzymology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018517" MajorTopicYN="N">Plant Roots</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName><QualifierName UI="Q000201" MajorTopicYN="N">enzymology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018547" MajorTopicYN="N">Plant Stems</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName><QualifierName UI="Q000201" MajorTopicYN="N">enzymology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D014197" MajorTopicYN="N">Trees</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="pubmed"><Year>2002</Year><Month>7</Month><Day>2</Day><Hour>10</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2003</Year><Month>3</Month><Day>27</Day><Hour>5</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2002</Year><Month>7</Month><Day>2</Day><Hour>10</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">12091153</ArticleId><ArticleId IdType="doi">10.1093/treephys/22.10.717</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>États-Unis</li></country><region><li>Maryland</li></region></list><tree><noCountry><name sortKey="Coleman, Gary D" sort="Coleman, Gary D" uniqKey="Coleman G" first="Gary D" last="Coleman">Gary D. Coleman</name><name sortKey="Fuchigami, Leslie H" sort="Fuchigami, Leslie H" uniqKey="Fuchigami L" first="Leslie H" last="Fuchigami">Leslie H. Fuchigami</name></noCountry><country name="États-Unis"><region name="Maryland"><name sortKey="Black, Brent L" sort="Black, Brent L" uniqKey="Black B" first="Brent L" last="Black">Brent L. Black</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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