Root carbon reserve dynamics in aspen seedlings: does simulated drought induce reserve limitation?
Identifieur interne : 002D26 ( Main/Exploration ); précédent : 002D25; suivant : 002D27Root carbon reserve dynamics in aspen seedlings: does simulated drought induce reserve limitation?
Auteurs : David A. Galvez [Canada] ; S M Landh Usser ; M T TyreeSource :
- Tree physiology [ 1758-4469 ] ; 2011.
Descripteurs français
- KwdFr :
- Amidon (analyse), Amidon (métabolisme), Canada (MeSH), Carbone (métabolisme), Dioxyde de carbone (métabolisme), Déshydratation (MeSH), Feuilles de plante (croissance et développement), Feuilles de plante (métabolisme), Glucides (analyse), Oxygène (métabolisme), Photosynthèse (MeSH), Plant (croissance et développement), Plant (métabolisme), Populus (croissance et développement), Populus (physiologie), Racines de plante (métabolisme), Stomates de plante (physiologie), Sécheresses (MeSH).
- MESH :
- analyse : Amidon, Glucides.
- croissance et développement : Feuilles de plante, Plant, Populus.
- métabolisme : Amidon, Carbone, Dioxyde de carbone, Feuilles de plante, Oxygène, Plant, Racines de plante.
- physiologie : Populus, Stomates de plante.
- Canada, Déshydratation, Photosynthèse, Sécheresses.
- Wicri :
- geographic : Canada.
English descriptors
- KwdEn :
- Canada (MeSH), Carbohydrates (analysis), Carbon (metabolism), Carbon Dioxide (metabolism), Dehydration (MeSH), Droughts (MeSH), Oxygen (metabolism), Photosynthesis (MeSH), Plant Leaves (growth & development), Plant Leaves (metabolism), Plant Roots (metabolism), Plant Stomata (physiology), Populus (growth & development), Populus (physiology), Seedlings (growth & development), Seedlings (metabolism), Starch (analysis), Starch (metabolism).
- MESH :
- chemical , analysis : Carbohydrates, Starch.
- chemical , metabolism : Carbon, Carbon Dioxide, Oxygen, Starch.
- geographic : Canada.
- growth & development : Plant Leaves, Populus, Seedlings.
- metabolism : Plant Leaves, Plant Roots, Seedlings.
- physiology : Plant Stomata, Populus.
- Dehydration, Droughts, Photosynthesis.
Abstract
In a greenhouse study we quantified the gradual change of gas exchange, water relations and root reserves of aspen (Populus tremuloides Michx.) seedlings growing over a 3-month period of severe water stress. The aim of the study was to quantify the complex interrelationship between growth, water and gas exchange, and root carbon (C) dynamics. Various growth, gas exchange and water relations variables in combination with root reserves were measured periodically on seedlings that had been exposed to a continuous drought treatment over a 12-week period and compared with well-watered seedlings. Although gas exchange and water relations parameters significantly decreased over the drought period in aspen seedlings, root reserves did not mirror this trend. During the course of the experiment roots of aspen seedlings growing under severe water stress showed a two orders of magnitude increase in sugar and starch content, and roots of these seedlings contained more starch relative to sugar than those in non-droughted seedlings. Drought resulted in a switch from growth to root reserves storage which indicates a close interrelationship between growth and physiological variables and the accumulation of root carbohydrate reserves. Although a severe 3-month drought period created physiological symptoms of C limitation, there was no indication of a depletion of root C reserve in aspen seedlings.
DOI: 10.1093/treephys/tpr012
PubMed: 21444372
Affiliations:
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Galvez</name><affiliation wicri:level="1"><nlm:affiliation>Department of Renewable Resources, Faculty of Agricultural, Life and Environmental Sciences, University of Alberta, Edmonton, AB, Canada. david.galvez@ualberta.ca</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Renewable Resources, Faculty of Agricultural, Life and Environmental Sciences, University of Alberta, Edmonton, AB</wicri:regionArea><wicri:noRegion>AB</wicri:noRegion></affiliation></author><author><name sortKey="Landh Usser, S M" sort="Landh Usser, S M" uniqKey="Landh Usser S" first="S M" last="Landh Usser">S M Landh Usser</name></author><author><name sortKey="Tyree, M T" sort="Tyree, M T" uniqKey="Tyree M" first="M T" last="Tyree">M T Tyree</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2011">2011</date><idno type="RBID">pubmed:21444372</idno><idno type="pmid">21444372</idno><idno type="doi">10.1093/treephys/tpr012</idno><idno type="wicri:Area/Main/Corpus">002E62</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">002E62</idno><idno type="wicri:Area/Main/Curation">002E62</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">002E62</idno><idno type="wicri:Area/Main/Exploration">002E62</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Root carbon reserve dynamics in aspen seedlings: does simulated drought induce reserve limitation?</title><author><name sortKey="Galvez, David A" sort="Galvez, David A" uniqKey="Galvez D" first="David A" last="Galvez">David A. Galvez</name><affiliation wicri:level="1"><nlm:affiliation>Department of Renewable Resources, Faculty of Agricultural, Life and Environmental Sciences, University of Alberta, Edmonton, AB, Canada. david.galvez@ualberta.ca</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Renewable Resources, Faculty of Agricultural, Life and Environmental Sciences, University of Alberta, Edmonton, AB</wicri:regionArea><wicri:noRegion>AB</wicri:noRegion></affiliation></author><author><name sortKey="Landh Usser, S M" sort="Landh Usser, S M" uniqKey="Landh Usser S" first="S M" last="Landh Usser">S M Landh Usser</name></author><author><name sortKey="Tyree, M T" sort="Tyree, M T" uniqKey="Tyree M" first="M T" last="Tyree">M T Tyree</name></author></analytic><series><title level="j">Tree physiology</title><idno type="eISSN">1758-4469</idno><imprint><date when="2011" type="published">2011</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Canada (MeSH)</term><term>Carbohydrates (analysis)</term><term>Carbon (metabolism)</term><term>Carbon Dioxide (metabolism)</term><term>Dehydration (MeSH)</term><term>Droughts (MeSH)</term><term>Oxygen (metabolism)</term><term>Photosynthesis (MeSH)</term><term>Plant Leaves (growth & development)</term><term>Plant Leaves (metabolism)</term><term>Plant Roots (metabolism)</term><term>Plant Stomata (physiology)</term><term>Populus (growth & development)</term><term>Populus (physiology)</term><term>Seedlings (growth & development)</term><term>Seedlings (metabolism)</term><term>Starch (analysis)</term><term>Starch (metabolism)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Amidon (analyse)</term><term>Amidon (métabolisme)</term><term>Canada (MeSH)</term><term>Carbone (métabolisme)</term><term>Dioxyde de carbone (métabolisme)</term><term>Déshydratation (MeSH)</term><term>Feuilles de plante (croissance et développement)</term><term>Feuilles de plante (métabolisme)</term><term>Glucides (analyse)</term><term>Oxygène (métabolisme)</term><term>Photosynthèse (MeSH)</term><term>Plant (croissance et développement)</term><term>Plant (métabolisme)</term><term>Populus (croissance et développement)</term><term>Populus (physiologie)</term><term>Racines de plante (métabolisme)</term><term>Stomates de plante (physiologie)</term><term>Sécheresses (MeSH)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="analysis" xml:lang="en"><term>Carbohydrates</term><term>Starch</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Carbon</term><term>Carbon Dioxide</term><term>Oxygen</term><term>Starch</term></keywords><keywords scheme="MESH" type="geographic" xml:lang="en"><term>Canada</term></keywords><keywords scheme="MESH" qualifier="analyse" xml:lang="fr"><term>Amidon</term><term>Glucides</term></keywords><keywords scheme="MESH" qualifier="croissance et développement" xml:lang="fr"><term>Feuilles de plante</term><term>Plant</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Plant Leaves</term><term>Populus</term><term>Seedlings</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Plant Leaves</term><term>Plant Roots</term><term>Seedlings</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Amidon</term><term>Carbone</term><term>Dioxyde de carbone</term><term>Feuilles de plante</term><term>Oxygène</term><term>Plant</term><term>Racines de plante</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Populus</term><term>Stomates de plante</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Plant Stomata</term><term>Populus</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Dehydration</term><term>Droughts</term><term>Photosynthesis</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Canada</term><term>Déshydratation</term><term>Photosynthèse</term><term>Sécheresses</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Canada</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">In a greenhouse study we quantified the gradual change of gas exchange, water relations and root reserves of aspen (Populus tremuloides Michx.) seedlings growing over a 3-month period of severe water stress. The aim of the study was to quantify the complex interrelationship between growth, water and gas exchange, and root carbon (C) dynamics. Various growth, gas exchange and water relations variables in combination with root reserves were measured periodically on seedlings that had been exposed to a continuous drought treatment over a 12-week period and compared with well-watered seedlings. Although gas exchange and water relations parameters significantly decreased over the drought period in aspen seedlings, root reserves did not mirror this trend. During the course of the experiment roots of aspen seedlings growing under severe water stress showed a two orders of magnitude increase in sugar and starch content, and roots of these seedlings contained more starch relative to sugar than those in non-droughted seedlings. Drought resulted in a switch from growth to root reserves storage which indicates a close interrelationship between growth and physiological variables and the accumulation of root carbohydrate reserves. Although a severe 3-month drought period created physiological symptoms of C limitation, there was no indication of a depletion of root C reserve in aspen seedlings.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">21444372</PMID><DateCompleted><Year>2011</Year><Month>08</Month><Day>25</Day></DateCompleted><DateRevised><Year>2015</Year><Month>11</Month><Day>19</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1758-4469</ISSN><JournalIssue CitedMedium="Internet"><Volume>31</Volume><Issue>3</Issue><PubDate><Year>2011</Year><Month>Mar</Month></PubDate></JournalIssue><Title>Tree physiology</Title><ISOAbbreviation>Tree Physiol</ISOAbbreviation></Journal><ArticleTitle>Root carbon reserve dynamics in aspen seedlings: does simulated drought induce reserve limitation?</ArticleTitle><Pagination><MedlinePgn>250-7</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1093/treephys/tpr012</ELocationID><Abstract><AbstractText>In a greenhouse study we quantified the gradual change of gas exchange, water relations and root reserves of aspen (Populus tremuloides Michx.) seedlings growing over a 3-month period of severe water stress. The aim of the study was to quantify the complex interrelationship between growth, water and gas exchange, and root carbon (C) dynamics. Various growth, gas exchange and water relations variables in combination with root reserves were measured periodically on seedlings that had been exposed to a continuous drought treatment over a 12-week period and compared with well-watered seedlings. Although gas exchange and water relations parameters significantly decreased over the drought period in aspen seedlings, root reserves did not mirror this trend. During the course of the experiment roots of aspen seedlings growing under severe water stress showed a two orders of magnitude increase in sugar and starch content, and roots of these seedlings contained more starch relative to sugar than those in non-droughted seedlings. Drought resulted in a switch from growth to root reserves storage which indicates a close interrelationship between growth and physiological variables and the accumulation of root carbohydrate reserves. 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DateType="Electronic"><Year>2011</Year><Month>03</Month><Day>28</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="D002241">Carbohydrates</NameOfSubstance></Chemical><Chemical><RegistryNumber>142M471B3J</RegistryNumber><NameOfSubstance UI="D002245">Carbon Dioxide</NameOfSubstance></Chemical><Chemical><RegistryNumber>7440-44-0</RegistryNumber><NameOfSubstance UI="D002244">Carbon</NameOfSubstance></Chemical><Chemical><RegistryNumber>9005-25-8</RegistryNumber><NameOfSubstance UI="D013213">Starch</NameOfSubstance></Chemical><Chemical><RegistryNumber>S88TT14065</RegistryNumber><NameOfSubstance UI="D010100">Oxygen</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><CommentsCorrectionsList><CommentsCorrections 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PubStatus="pubmed"><Year>2011</Year><Month>3</Month><Day>30</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2011</Year><Month>8</Month><Day>27</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">21444372</ArticleId><ArticleId IdType="pii">tpr012</ArticleId><ArticleId IdType="doi">10.1093/treephys/tpr012</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Canada</li></country></list><tree><noCountry><name sortKey="Landh Usser, S M" sort="Landh Usser, S M" uniqKey="Landh Usser S" first="S M" last="Landh Usser">S M Landh Usser</name><name sortKey="Tyree, M T" sort="Tyree, M T" uniqKey="Tyree M" first="M T" last="Tyree">M T Tyree</name></noCountry><country name="Canada"><noRegion><name sortKey="Galvez, David A" sort="Galvez, David A" uniqKey="Galvez D" first="David A" last="Galvez">David A. 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