AustralieFrV1, Main, Exploration, bibRecord, 006540

δ13C of leaf-respired CO2 reflects intrinsic water-use efficiency in barley

Identifieur interne : 006540 ( Main/Exploration ); précédent : 006539; suivant : 006541

δ13C of leaf-respired CO2 reflects intrinsic water-use efficiency in barley

Auteurs : Margaret M. Barbour [Australie, Royaume-Uni] ; Guillaume Tcherkez [France] ; Christopher P. Bickford [Royaume-Uni] ; Caroline Mauve [France] ; Marlene Lamothe [France] ; Sarah Sinton [Nouvelle-Zélande] ; Hamish Brown [Nouvelle-Zélande]

Source :

Plant, cell and environment : (Print) [ 0140-7791 ] ; 2011.

RBID : Pascal:11-0200918

Descripteurs français

Pascal (Inist)
- Discrimination isotopique carbone, Feuille végétal, Respiration, Efficacité utilisation eau, Fractionnement, Photosynthèse, Transpiration, Hordeum vulgare, Triticum, Secale, Dioxyde de carbone, Carbone Isotope, Carbone 13, Ecologie végétale.

English descriptors

KwdEn :
- C-13, Carbon Isotopes, Carbon dioxide, Carbon isotope discrimination, Fractionation, Hordeum vulgare, Photosynthesis, Plant ecology, Plant leaf, Respiration, Secale, Transpiration, Triticum, Water use efficiency.

Abstract

Leaf intrinsic water-use efficiency (WUE), the ratio of photosynthetic rate to stomatal conductance (A/g_s), is a key plant trait linking terrestrial carbon and water cycles. A rapid, integrative proxy for A/g_s is of benefit to crop breeding programmes aiming to improve WUE, but also for ecologists interested in plant carbon-water balance in natural systems. We hypothesize that the carbon isotope composition of leaf-respired CO₂ (δ¹³C_RI), two hours after leaves are transferred to the dark, records photosynthetic carbon isotope discrimination and so provides a proxy for A/g_s. To test this hypothesis, δ¹³C_RI was measured in four barley cultivars grown in the field at two levels of water availability and compared to leaf-level gas exchange (the ratio of leaf intercellular to ambient CO₂ partial pressure, C_i/C_a, and A/g_s). Leaf-respired CO₂ was more ¹³C-depleted in plants grown at higher water availability, varied between days as environmental conditions changed, and was significantly different between cultivars. A strong relationship between δ¹³C_RI and δ¹³C of sucrose was observed. δ¹³C_RI was converted into apparent photosynthetic discrimination (Δ¹³C_RI) revealing strong relationships between Δ¹³C_RI and C_i/C_a and A/g_s during the vegetative stage of growth. We therefore conclude that δ¹³C_RI may provide a rapid, integrative proxy for A/g_s in barley.

Affiliations:

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Le document en format XML

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C of leaf-respired CO<sub>2</sub>
 reflects intrinsic water-use efficiency in barley</title>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">δ<sup>13</sup>
C of leaf-respired CO<sub>2</sub>
 reflects intrinsic water-use efficiency in barley</title>
<author><name sortKey="Barbour, Margaret M" sort="Barbour, Margaret M" uniqKey="Barbour M" first="Margaret M." last="Barbour">Margaret M. Barbour</name>
<affiliation wicri:level="4"><inist:fA14 i1="01"><s1>Faculty of Agriculture, Food and Natural Resources, The University of Sydney, Private Bag 4011</s1>
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<s3>AUS</s3>
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<region type="état">Nouvelle-Galles du Sud</region>
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</affiliation>
<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Landcare Research, PO Box 40</s1>
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<s3>GBR</s3>
<sZ>1 aut.</sZ>
<sZ>3 aut.</sZ>
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</affiliation>
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<author><name sortKey="Tcherkez, Guillaume" sort="Tcherkez, Guillaume" uniqKey="Tcherkez G" first="Guillaume" last="Tcherkez">Guillaume Tcherkez</name>
<affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Plateforme Métabolisme-Métabolome, Institut de Biologie des Plantes, Université Paris Sud 11, CNRS UMR 8618</s1>
<s2>91405 Orsay</s2>
<s3>FRA</s3>
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<wicri:noRegion>91405 Orsay</wicri:noRegion>
<wicri:noRegion>CNRS UMR 8618</wicri:noRegion>
<wicri:noRegion>91405 Orsay</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Bickford, Christopher P" sort="Bickford, Christopher P" uniqKey="Bickford C" first="Christopher P." last="Bickford">Christopher P. Bickford</name>
<affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Landcare Research, PO Box 40</s1>
<s2>Lincoln 7640</s2>
<s3>GBR</s3>
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<sZ>3 aut.</sZ>
</inist:fA14>
<country>Royaume-Uni</country>
<wicri:noRegion>Lincoln 7640</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Mauve, Caroline" sort="Mauve, Caroline" uniqKey="Mauve C" first="Caroline" last="Mauve">Caroline Mauve</name>
<affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Plateforme Métabolisme-Métabolome, Institut de Biologie des Plantes, Université Paris Sud 11, CNRS UMR 8618</s1>
<s2>91405 Orsay</s2>
<s3>FRA</s3>
<sZ>2 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>5 aut.</sZ>
</inist:fA14>
<country>France</country>
<wicri:noRegion>91405 Orsay</wicri:noRegion>
<wicri:noRegion>CNRS UMR 8618</wicri:noRegion>
<wicri:noRegion>91405 Orsay</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Lamothe, Marlene" sort="Lamothe, Marlene" uniqKey="Lamothe M" first="Marlene" last="Lamothe">Marlene Lamothe</name>
<affiliation wicri:level="1"><inist:fA14 i1="04"><s1>Plateforme Métabolisme-Métabolome, Institut de Biologie des Plantes, Université Paris Sud 11, CNRS UMR 8618</s1>
<s2>91405 Orsay</s2>
<s3>FRA</s3>
<sZ>2 aut.</sZ>
<sZ>4 aut.</sZ>
<sZ>5 aut.</sZ>
</inist:fA14>
<country>France</country>
<wicri:noRegion>91405 Orsay</wicri:noRegion>
<wicri:noRegion>CNRS UMR 8618</wicri:noRegion>
<wicri:noRegion>91405 Orsay</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Sinton, Sarah" sort="Sinton, Sarah" uniqKey="Sinton S" first="Sarah" last="Sinton">Sarah Sinton</name>
<affiliation wicri:level="1"><inist:fA14 i1="03"><s1>The New Zealand Institute for Plant and Food Research, Private Bag 4704</s1>
<s2>Christchurch</s2>
<s3>NZL</s3>
<sZ>6 aut.</sZ>
<sZ>7 aut.</sZ>
</inist:fA14>
<country>Nouvelle-Zélande</country>
<wicri:noRegion>Christchurch</wicri:noRegion>
</affiliation>
</author>
<author><name sortKey="Brown, Hamish" sort="Brown, Hamish" uniqKey="Brown H" first="Hamish" last="Brown">Hamish Brown</name>
<affiliation wicri:level="1"><inist:fA14 i1="03"><s1>The New Zealand Institute for Plant and Food Research, Private Bag 4704</s1>
<s2>Christchurch</s2>
<s3>NZL</s3>
<sZ>6 aut.</sZ>
<sZ>7 aut.</sZ>
</inist:fA14>
<country>Nouvelle-Zélande</country>
<wicri:noRegion>Christchurch</wicri:noRegion>
</affiliation>
</author>
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<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>
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<seriesStmt><title level="j" type="main">Plant, cell and environment : (Print)</title>
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</seriesStmt>
</fileDesc>
<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>C-13</term>
<term>Carbon Isotopes</term>
<term>Carbon dioxide</term>
<term>Carbon isotope discrimination</term>
<term>Fractionation</term>
<term>Hordeum vulgare</term>
<term>Photosynthesis</term>
<term>Plant ecology</term>
<term>Plant leaf</term>
<term>Respiration</term>
<term>Secale</term>
<term>Transpiration</term>
<term>Triticum</term>
<term>Water use efficiency</term>
</keywords>
<keywords scheme="Pascal" xml:lang="fr"><term>Discrimination isotopique carbone</term>
<term>Feuille végétal</term>
<term>Respiration</term>
<term>Efficacité utilisation eau</term>
<term>Fractionnement</term>
<term>Photosynthèse</term>
<term>Transpiration</term>
<term>Hordeum vulgare</term>
<term>Triticum</term>
<term>Secale</term>
<term>Dioxyde de carbone</term>
<term>Carbone Isotope</term>
<term>Carbone 13</term>
<term>Ecologie végétale</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">Leaf intrinsic water-use efficiency (WUE), the ratio of photosynthetic rate to stomatal conductance (A/g<sub>s</sub>
), is a key plant trait linking terrestrial carbon and water cycles. A rapid, integrative proxy for A/g<sub>s</sub>
 is of benefit to crop breeding programmes aiming to improve WUE, but also for ecologists interested in plant carbon-water balance in natural systems. We hypothesize that the carbon isotope composition of leaf-respired CO<sub>2</sub>
 (δ<sup>13</sup>
C<sub>RI</sub>
), two hours after leaves are transferred to the dark, records photosynthetic carbon isotope discrimination and so provides a proxy for A/g<sub>s</sub>
. To test this hypothesis, δ<sup>13</sup>
C<sub>RI</sub>
 was measured in four barley cultivars grown in the field at two levels of water availability and compared to leaf-level gas exchange (the ratio of leaf intercellular to ambient CO<sub>2</sub>
 partial pressure, C<sub>i</sub>
/C<sub>a</sub>
, and A/g<sub>s</sub>
). Leaf-respired CO<sub>2</sub>
 was more <sup>13</sup>
C-depleted in plants grown at higher water availability, varied between days as environmental conditions changed, and was significantly different between cultivars. A strong relationship between δ<sup>13</sup>
C<sub>RI</sub>
 and δ<sup>13</sup>
C of sucrose was observed. δ<sup>13</sup>
C<sub>RI</sub>
 was converted into apparent photosynthetic discrimination (Δ<sup>13</sup>
C<sub>RI</sub>
) revealing strong relationships between Δ<sup>13</sup>
C<sub>RI</sub>
 and C<sub>i</sub>
/C<sub>a</sub>
 and A/g<sub>s</sub>
 during the vegetative stage of growth. We therefore conclude that δ<sup>13</sup>
C<sub>RI</sub>
 may provide a rapid, integrative proxy for A/g<sub>s</sub>
 in barley.</div>
</front>
</TEI>
<affiliations><list><country><li>Australie</li>
<li>France</li>
<li>Nouvelle-Zélande</li>
<li>Royaume-Uni</li>
</country>
<region><li>Nouvelle-Galles du Sud</li>
</region>
<settlement><li>Sydney</li>
</settlement>
<orgName><li>Université de Sydney</li>
</orgName>
</list>
<tree><country name="Australie"><region name="Nouvelle-Galles du Sud"><name sortKey="Barbour, Margaret M" sort="Barbour, Margaret M" uniqKey="Barbour M" first="Margaret M." last="Barbour">Margaret M. Barbour</name>
</region>
</country>
<country name="Royaume-Uni"><noRegion><name sortKey="Barbour, Margaret M" sort="Barbour, Margaret M" uniqKey="Barbour M" first="Margaret M." last="Barbour">Margaret M. Barbour</name>
</noRegion>
<name sortKey="Bickford, Christopher P" sort="Bickford, Christopher P" uniqKey="Bickford C" first="Christopher P." last="Bickford">Christopher P. Bickford</name>
</country>
<country name="France"><noRegion><name sortKey="Tcherkez, Guillaume" sort="Tcherkez, Guillaume" uniqKey="Tcherkez G" first="Guillaume" last="Tcherkez">Guillaume Tcherkez</name>
</noRegion>
<name sortKey="Lamothe, Marlene" sort="Lamothe, Marlene" uniqKey="Lamothe M" first="Marlene" last="Lamothe">Marlene Lamothe</name>
<name sortKey="Mauve, Caroline" sort="Mauve, Caroline" uniqKey="Mauve C" first="Caroline" last="Mauve">Caroline Mauve</name>
</country>
<country name="Nouvelle-Zélande"><noRegion><name sortKey="Sinton, Sarah" sort="Sinton, Sarah" uniqKey="Sinton S" first="Sarah" last="Sinton">Sarah Sinton</name>
</noRegion>
<name sortKey="Brown, Hamish" sort="Brown, Hamish" uniqKey="Brown H" first="Hamish" last="Brown">Hamish Brown</name>
</country>
</tree>
</affiliations>
</record>

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δ13C of leaf-respired CO2 reflects intrinsic water-use efficiency in barley

δ13C of leaf-respired CO2 reflects intrinsic water-use efficiency in barley

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri