Inhibitor studies of leaf lamina hydraulic conductance in trembling aspen (Populus tremuloides Michx.) leaves.
Identifieur interne : 003213 ( Main/Exploration ); précédent : 003212; suivant : 003214Inhibitor studies of leaf lamina hydraulic conductance in trembling aspen (Populus tremuloides Michx.) leaves.
Auteurs : Mihaela C. Voicu [Canada] ; Janusz J. ZwiazekSource :
- Tree physiology [ 0829-318X ] ; 2010.
Descripteurs français
- KwdFr :
- 2-Sulfanyl-éthanol (pharmacologie), Aquaporines (antagonistes et inhibiteurs), Atrazine (pharmacologie), Chlorure de mercure II (pharmacologie), Concentration en ions d'hydrogène (MeSH), Eau (métabolisme), Feuilles de plante (effets des médicaments et des substances chimiques), Fluorure de sodium (pharmacologie), Photosynthèse (MeSH), Populus (effets des médicaments et des substances chimiques), Transpiration des plantes (effets des médicaments et des substances chimiques).
- MESH :
- antagonistes et inhibiteurs : Aquaporines.
- effets des médicaments et des substances chimiques : Feuilles de plante, Populus, Transpiration des plantes.
- métabolisme : Eau.
- pharmacologie : 2-Sulfanyl-éthanol, Atrazine, Chlorure de mercure II, Fluorure de sodium.
- Concentration en ions d'hydrogène, Photosynthèse.
English descriptors
- KwdEn :
- Aquaporins (antagonists & inhibitors), Atrazine (pharmacology), Hydrogen-Ion Concentration (MeSH), Mercaptoethanol (pharmacology), Mercuric Chloride (pharmacology), Photosynthesis (MeSH), Plant Leaves (drug effects), Plant Transpiration (drug effects), Populus (drug effects), Sodium Fluoride (pharmacology), Water (metabolism).
- MESH :
- chemical , antagonists & inhibitors : Aquaporins.
- chemical , metabolism : Water.
- chemical , pharmacology : Atrazine, Mercaptoethanol, Mercuric Chloride, Sodium Fluoride.
- drug effects : Plant Leaves, Plant Transpiration, Populus.
- Hydrogen-Ion Concentration, Photosynthesis.
Abstract
The present study investigated leaf water transport properties in trembling aspen (Populus tremuloides) leaves. Leaf lamina hydraulic conductance (K(lam)) and stomatal conductance (g(s)) were drastically suppressed by NaF (a general metabolic inhibitor). In leaves treated with 0.2 mM HgCl(2) (an aquaporin blocker), K(lam) declined by 22% when the leaves were sampled in June but the decline was not significant when the leaves were sampled in August. The leaves sampled in June that transpired 30 mM beta-mercaptoethanol following mercury application showed similar K(lam) as those in control leaves transpiring distilled water. When leaves were pressure-infiltrated with 0.1 mM HgCl(2), K(lam) significantly declined by 25%. Atrazine (a photosystem II inhibitor) drastically reduced leaf net CO(2) uptake by the leaves from seedlings and mature trees but did not have any effect on K(lam) regardless of the irradiance at the leaf level during the K(lam) measurements. When PTS(3) (trisodium 3-hydroxy-5,8,10-pyrenetrisulphonate) apoplastic tracer was pressure-infiltrated inside the leaves, its concentration in the leaf exudates did not change from ambient light to high irradiance treatment and declined in the presence of HgCl(2) in the treatment solution. Trembling aspen K(lam) appears to be linked to leaf metabolism and is uncoupled from the short-term variations in photosynthesis. Aquaporin-mediated water transport does not appear to constitute the dominant pathway for the pressure-driven water flow in the leaves of trembling aspen trees.
DOI: 10.1093/treephys/tpp112
PubMed: 20022867
Affiliations:
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Zwiazek</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2010">2010</date><idno type="RBID">pubmed:20022867</idno><idno type="pmid">20022867</idno><idno type="doi">10.1093/treephys/tpp112</idno><idno type="wicri:Area/Main/Corpus">003355</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">003355</idno><idno type="wicri:Area/Main/Curation">003355</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">003355</idno><idno type="wicri:Area/Main/Exploration">003355</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Inhibitor studies of leaf lamina hydraulic conductance in trembling aspen (Populus tremuloides Michx.) leaves.</title><author><name sortKey="Voicu, Mihaela C" sort="Voicu, Mihaela C" uniqKey="Voicu M" first="Mihaela C" last="Voicu">Mihaela C. Voicu</name><affiliation wicri:level="1"><nlm:affiliation>Department of Renewable Resources, University of Alberta, Edmonton, Alberta, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Renewable Resources, University of Alberta, Edmonton, Alberta</wicri:regionArea><wicri:noRegion>Alberta</wicri:noRegion></affiliation></author><author><name sortKey="Zwiazek, Janusz J" sort="Zwiazek, Janusz J" uniqKey="Zwiazek J" first="Janusz J" last="Zwiazek">Janusz J. Zwiazek</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 (antagonists & inhibitors)</term><term>Atrazine (pharmacology)</term><term>Hydrogen-Ion Concentration (MeSH)</term><term>Mercaptoethanol (pharmacology)</term><term>Mercuric Chloride (pharmacology)</term><term>Photosynthesis (MeSH)</term><term>Plant Leaves (drug effects)</term><term>Plant Transpiration (drug effects)</term><term>Populus (drug effects)</term><term>Sodium Fluoride (pharmacology)</term><term>Water (metabolism)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>2-Sulfanyl-éthanol (pharmacologie)</term><term>Aquaporines (antagonistes et inhibiteurs)</term><term>Atrazine (pharmacologie)</term><term>Chlorure de mercure II (pharmacologie)</term><term>Concentration en ions d'hydrogène (MeSH)</term><term>Eau (métabolisme)</term><term>Feuilles de plante (effets des médicaments et des substances chimiques)</term><term>Fluorure de sodium (pharmacologie)</term><term>Photosynthèse (MeSH)</term><term>Populus (effets des médicaments et des substances chimiques)</term><term>Transpiration des plantes (effets des médicaments et des substances chimiques)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="antagonists & inhibitors" xml:lang="en"><term>Aquaporins</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Water</term></keywords><keywords scheme="MESH" type="chemical" qualifier="pharmacology" xml:lang="en"><term>Atrazine</term><term>Mercaptoethanol</term><term>Mercuric Chloride</term><term>Sodium Fluoride</term></keywords><keywords scheme="MESH" qualifier="antagonistes et inhibiteurs" xml:lang="fr"><term>Aquaporines</term></keywords><keywords scheme="MESH" qualifier="drug effects" xml:lang="en"><term>Plant Leaves</term><term>Plant Transpiration</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="effets des médicaments et des substances chimiques" xml:lang="fr"><term>Feuilles de plante</term><term>Populus</term><term>Transpiration des plantes</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Eau</term></keywords><keywords scheme="MESH" qualifier="pharmacologie" xml:lang="fr"><term>2-Sulfanyl-éthanol</term><term>Atrazine</term><term>Chlorure de mercure II</term><term>Fluorure de sodium</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Hydrogen-Ion Concentration</term><term>Photosynthesis</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Concentration en ions d'hydrogène</term><term>Photosynthèse</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The present study investigated leaf water transport properties in trembling aspen (Populus tremuloides) leaves. Leaf lamina hydraulic conductance (K(lam)) and stomatal conductance (g(s)) were drastically suppressed by NaF (a general metabolic inhibitor). In leaves treated with 0.2 mM HgCl(2) (an aquaporin blocker), K(lam) declined by 22% when the leaves were sampled in June but the decline was not significant when the leaves were sampled in August. The leaves sampled in June that transpired 30 mM beta-mercaptoethanol following mercury application showed similar K(lam) as those in control leaves transpiring distilled water. When leaves were pressure-infiltrated with 0.1 mM HgCl(2), K(lam) significantly declined by 25%. Atrazine (a photosystem II inhibitor) drastically reduced leaf net CO(2) uptake by the leaves from seedlings and mature trees but did not have any effect on K(lam) regardless of the irradiance at the leaf level during the K(lam) measurements. When PTS(3) (trisodium 3-hydroxy-5,8,10-pyrenetrisulphonate) apoplastic tracer was pressure-infiltrated inside the leaves, its concentration in the leaf exudates did not change from ambient light to high irradiance treatment and declined in the presence of HgCl(2) in the treatment solution. Trembling aspen K(lam) appears to be linked to leaf metabolism and is uncoupled from the short-term variations in photosynthesis. Aquaporin-mediated water transport does not appear to constitute the dominant pathway for the pressure-driven water flow in the leaves of trembling aspen trees.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">20022867</PMID><DateCompleted><Year>2010</Year><Month>04</Month><Day>29</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>2</Issue><PubDate><Year>2010</Year><Month>Feb</Month></PubDate></JournalIssue><Title>Tree physiology</Title><ISOAbbreviation>Tree Physiol</ISOAbbreviation></Journal><ArticleTitle>Inhibitor studies of leaf lamina hydraulic conductance in trembling aspen (Populus tremuloides Michx.) leaves.</ArticleTitle><Pagination><MedlinePgn>193-204</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1093/treephys/tpp112</ELocationID><Abstract><AbstractText>The present study investigated leaf water transport properties in trembling aspen (Populus tremuloides) leaves. Leaf lamina hydraulic conductance (K(lam)) and stomatal conductance (g(s)) were drastically suppressed by NaF (a general metabolic inhibitor). In leaves treated with 0.2 mM HgCl(2) (an aquaporin blocker), K(lam) declined by 22% when the leaves were sampled in June but the decline was not significant when the leaves were sampled in August. The leaves sampled in June that transpired 30 mM beta-mercaptoethanol following mercury application showed similar K(lam) as those in control leaves transpiring distilled water. When leaves were pressure-infiltrated with 0.1 mM HgCl(2), K(lam) significantly declined by 25%. Atrazine (a photosystem II inhibitor) drastically reduced leaf net CO(2) uptake by the leaves from seedlings and mature trees but did not have any effect on K(lam) regardless of the irradiance at the leaf level during the K(lam) measurements. When PTS(3) (trisodium 3-hydroxy-5,8,10-pyrenetrisulphonate) apoplastic tracer was pressure-infiltrated inside the leaves, its concentration in the leaf exudates did not change from ambient light to high irradiance treatment and declined in the presence of HgCl(2) in the treatment solution. Trembling aspen K(lam) appears to be linked to leaf metabolism and is uncoupled from the short-term variations in photosynthesis. Aquaporin-mediated water transport does not appear to constitute the dominant pathway for the pressure-driven water flow in the leaves of trembling aspen trees.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Voicu</LastName><ForeName>Mihaela C</ForeName><Initials>MC</Initials><AffiliationInfo><Affiliation>Department of Renewable Resources, University of Alberta, Edmonton, Alberta, Canada.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Zwiazek</LastName><ForeName>Janusz J</ForeName><Initials>JJ</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2009</Year><Month>12</Month><Day>17</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>53GH7MZT1R</RegistryNumber><NameOfSubstance UI="D008627">Mercuric Chloride</NameOfSubstance></Chemical><Chemical><RegistryNumber>60-24-2</RegistryNumber><NameOfSubstance UI="D008623">Mercaptoethanol</NameOfSubstance></Chemical><Chemical><RegistryNumber>8ZYQ1474W7</RegistryNumber><NameOfSubstance UI="D012969">Sodium Fluoride</NameOfSubstance></Chemical><Chemical><RegistryNumber>QJA9M5H4IM</RegistryNumber><NameOfSubstance UI="D001280">Atrazine</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D020346" MajorTopicYN="N">Aquaporins</DescriptorName><QualifierName UI="Q000037" MajorTopicYN="Y">antagonists & inhibitors</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D001280" MajorTopicYN="N">Atrazine</DescriptorName><QualifierName UI="Q000494" MajorTopicYN="N">pharmacology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D006863" MajorTopicYN="N">Hydrogen-Ion Concentration</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D008623" MajorTopicYN="N">Mercaptoethanol</DescriptorName><QualifierName UI="Q000494" MajorTopicYN="N">pharmacology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D008627" MajorTopicYN="N">Mercuric Chloride</DescriptorName><QualifierName UI="Q000494" MajorTopicYN="N">pharmacology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D010788" MajorTopicYN="N">Photosynthesis</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018515" MajorTopicYN="N">Plant Leaves</DescriptorName><QualifierName UI="Q000187" MajorTopicYN="Y">drug effects</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018526" MajorTopicYN="N">Plant Transpiration</DescriptorName><QualifierName UI="Q000187" MajorTopicYN="Y">drug effects</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName><QualifierName UI="Q000187" MajorTopicYN="Y">drug effects</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D012969" MajorTopicYN="N">Sodium Fluoride</DescriptorName><QualifierName UI="Q000494" MajorTopicYN="N">pharmacology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D014867" MajorTopicYN="N">Water</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2009</Year><Month>12</Month><Day>22</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2009</Year><Month>12</Month><Day>22</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2010</Year><Month>4</Month><Day>30</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">20022867</ArticleId><ArticleId IdType="pii">tpp112</ArticleId><ArticleId IdType="doi">10.1093/treephys/tpp112</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Canada</li></country></list><tree><noCountry><name sortKey="Zwiazek, Janusz J" sort="Zwiazek, Janusz J" uniqKey="Zwiazek J" first="Janusz J" last="Zwiazek">Janusz J. Zwiazek</name></noCountry><country name="Canada"><noRegion><name sortKey="Voicu, Mihaela C" sort="Voicu, Mihaela C" uniqKey="Voicu M" first="Mihaela C" last="Voicu">Mihaela C. Voicu</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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