Compound-specific differences in 13C of soluble carbohydrates in leaves and phloem of 6-month-old Eucalyptus globulus (Labill)
Identifieur interne : 006C39 ( Main/Exploration ); précédent : 006C38; suivant : 006C40Compound-specific differences in 13C of soluble carbohydrates in leaves and phloem of 6-month-old Eucalyptus globulus (Labill)
Auteurs : Andrew Merchant [Australie] ; Birgit Wild [Autriche] ; Andreas Richter [Autriche] ; Sidonie Bellot [France] ; Mark A. Adams [Australie] ; Erwin Dreyer [France]Source :
- Plant, cell and environment : (Print) [ 0140-7791 ] ; 2011.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
Abstract
Movement of photoassimilates from leaves to phloem is an important step for the flux of carbon through plants. Fractionation of carbon isotopes during this process may influence their abundance in heterotrophic tissues. We subjected Eucalyptus globulus to 20, 25 and 28 °C ambient growth temperatures and measured compound-specific δ13C of carbohydrates obtained from leaves and bled phloem sap. We compared δ13C of sucrose and raffinose obtained from leaf or phloem and of total leaf soluble carbon, with modelled values predicted by leaf gas exchange. Changes in δ13C of sucrose and raffinose obtained from either leaves or phloem sap were more tightly coupled to changes in ci/ca than was δ13C of leaf soluble carbon. At 25 and 28 °C, sucrose and raffinose were enriched in δ13C compared to leaf soluble carbon and predicted values - irrespective of tissue type. Phloem sucrose was depleted and raffinose enriched in "C compared to leaf extracts. Intermolecular and tissue-specific δ13C reveal that multiple systematic factors influence "C composition during export to phloem. Predicting sensitivity of these factors to changes in plant physiological status will improve our ability to infer plant function at a range of temporal and spatial scales.
Affiliations:
- Australie, Autriche, France
- Grand Est, Lorraine (région), Nouvelle-Galles du Sud
- Nancy, Sydney
- Nancy-Université, Université de Sydney
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Adams</name><affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Faculty of Agriculture, Food and Natural Resources, The University of Sydney</s1><s2>Sydney 2006</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Australie</country><placeName><settlement type="city">Sydney</settlement><region type="état">Nouvelle-Galles du Sud</region><settlement type="city">Sydney</settlement></placeName><orgName type="university">Université de Sydney</orgName></affiliation></author><author><name sortKey="Dreyer, Erwin" sort="Dreyer, Erwin" uniqKey="Dreyer E" first="Erwin" last="Dreyer">Erwin Dreyer</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>INRA, UMR 1137, Ecologie et Ecophysiologie Forestières</s1><s2>54280 Champenoux</s2><s3>FRA</s3><sZ>4 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>54280 Champenoux</wicri:noRegion><wicri:noRegion>Ecologie et Ecophysiologie Forestières</wicri:noRegion><wicri:noRegion>54280 Champenoux</wicri:noRegion></affiliation><affiliation wicri:level="4"><inist:fA14 i1="04"><s1>Nancy Université, UMR 1137, Ecologie et Ecophysiologie Forestières, Faculté des Sciences</s1><s2>54500 Vandoeuvre</s2><s3>FRA</s3><sZ>6 aut.</sZ></inist:fA14><country>France</country><wicri:noRegion>54500 Vandoeuvre</wicri:noRegion><wicri:noRegion>Faculté des Sciences</wicri:noRegion><wicri:noRegion>54500 Vandoeuvre</wicri:noRegion><orgName type="university">Nancy-Université</orgName><placeName><settlement type="city">Nancy</settlement><region type="region" nuts="2">Grand Est</region><region type="region" nuts="2">Lorraine (région)</region></placeName></affiliation></author></analytic><series><title level="j" type="main">Plant, cell and environment : (Print)</title><title level="j" type="abbreviated">Plant cell environ. : (Print)</title><idno type="ISSN">0140-7791</idno><imprint><date when="2011">2011</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Plant, cell and environment : (Print)</title><title level="j" type="abbreviated">Plant cell environ. : (Print)</title><idno type="ISSN">0140-7791</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>C-13</term><term>Compounds</term><term>Eucalyptus globulus</term><term>Isotopic composition</term><term>Phloem</term><term>Plant ecology</term><term>Plant leaf</term><term>Sap</term><term>Soluble sugar</term><term>Specificity</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Spécificité</term><term>Feuille végétal</term><term>Phloème</term><term>Composition isotopique</term><term>Sève</term><term>Eucalyptus globulus</term><term>Composé</term><term>Sucre soluble</term><term>Carbone 13</term><term>Ecologie végétale</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Movement of photoassimilates from leaves to phloem is an important step for the flux of carbon through plants. Fractionation of carbon isotopes during this process may influence their abundance in heterotrophic tissues. We subjected Eucalyptus globulus to 20, 25 and 28 °C ambient growth temperatures and measured compound-specific δ<sup>13</sup>C of carbohydrates obtained from leaves and bled phloem sap. We compared δ<sup>13</sup>C of sucrose and raffinose obtained from leaf or phloem and of total leaf soluble carbon, with modelled values predicted by leaf gas exchange. Changes in δ<sup>13</sup>C of sucrose and raffinose obtained from either leaves or phloem sap were more tightly coupled to changes in c<sub>i</sub>/c<sub>a</sub> than was δ<sup>13</sup>C of leaf soluble carbon. At 25 and 28 °C, sucrose and raffinose were enriched in δ<sup>13</sup>C compared to leaf soluble carbon and predicted values - irrespective of tissue type. Phloem sucrose was depleted and raffinose enriched in "C compared to leaf extracts. Intermolecular and tissue-specific δ<sup>13</sup>C reveal that multiple systematic factors influence "C composition during export to phloem. Predicting sensitivity of these factors to changes in plant physiological status will improve our ability to infer plant function at a range of temporal and spatial scales.</div></front></TEI><affiliations><list><country><li>Australie</li><li>Autriche</li><li>France</li></country><region><li>Grand Est</li><li>Lorraine (région)</li><li>Nouvelle-Galles du Sud</li></region><settlement><li>Nancy</li><li>Sydney</li></settlement><orgName><li>Nancy-Université</li><li>Université de Sydney</li></orgName></list><tree><country name="Australie"><region name="Nouvelle-Galles du Sud"><name sortKey="Merchant, Andrew" sort="Merchant, Andrew" uniqKey="Merchant A" first="Andrew" last="Merchant">Andrew Merchant</name></region><name sortKey="Adams, Mark A" sort="Adams, Mark A" uniqKey="Adams M" first="Mark A." last="Adams">Mark A. Adams</name></country><country name="Autriche"><noRegion><name sortKey="Wild, Birgit" sort="Wild, Birgit" uniqKey="Wild B" first="Birgit" last="Wild">Birgit Wild</name></noRegion><name sortKey="Richter, Andreas" sort="Richter, Andreas" uniqKey="Richter A" first="Andreas" last="Richter">Andreas Richter</name></country><country name="France"><noRegion><name sortKey="Bellot, Sidonie" sort="Bellot, Sidonie" uniqKey="Bellot S" first="Sidonie" last="Bellot">Sidonie Bellot</name></noRegion><name sortKey="Dreyer, Erwin" sort="Dreyer, Erwin" uniqKey="Dreyer E" first="Erwin" last="Dreyer">Erwin Dreyer</name><name sortKey="Dreyer, Erwin" sort="Dreyer, Erwin" uniqKey="Dreyer E" first="Erwin" last="Dreyer">Erwin Dreyer</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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