Sink feedback regulation of photosynthesis in vines: measurements and a model
Identifieur interne : 002463 ( Istex/Corpus ); précédent : 002462; suivant : 002464Sink feedback regulation of photosynthesis in vines: measurements and a model
Auteurs : Anne Quereix ; Roderick C. Dewar ; Jean-Pierre Gaudillere ; Sylvia Dayau ; Charles ValancogneSource :
- Journal of Experimental Botany [ 0022-0957 ] ; 2001-12-01.
English descriptors
- KwdEn :
Abstract
An experimental and modelling study of source–sink interactions in Vitis vinifera L., cv. Cabernet Sauvignon, rooted cuttings under non‐limiting environmental conditions with a 12 h photoperiod is presented here. After 4 h, measured photosynthesis, stomatal conductance and leaf carbohydrate content reached maximum values. Over the remainder of the photoperiod, photosynthesis and stomatal conductance decreased continuously, whereas leaf carbohydrate content remained relatively constant. Because the experiment took place in a non‐limiting environment, the results suggest that stomatal regulation of photosynthesis was mediated by an internal factor, possibly related to sink activity. A simple 1‐source, 2‐sink model was developed to examine the extent to which the data could be explained by a hypothetical sink‐to‐source feedback mechanism mediated by carbohydrate levels in either the mesophyll, the source phloem or the phloem of one of the two sinks. Model simulations reproduced the data well under the hypothesis of a phloem‐based feedback signal, although the data were insufficient to elucidate the detailed nature of such a signal. In a sensitivity analysis, the steady‐state response of photosynthesis to sink activity was explored and predictions made for the partitioning of photosynthate between the two sinks. The analysis highlights the effectiveness of a phloem‐based feedback signal in regulating the balance between source and sink activities. However, other mechanisms for the observed decline in photosynthesis, such as photoinhibition, endogenous circadian rhythms or hydraulic signals in the leaf cannot be excluded. Nevertheless, it is concluded that the phloem‐based feedback model developed here may provide a useful working hypothesis for incorporation into plant growth models and for further development and testing.
Url:
DOI: 10.1093/jexbot/52.365.2313
Links to Exploration step
ISTEX:4064D1692E9B0E97D34D177EB57B718D755F1261Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Sink feedback regulation of photosynthesis in vines: measurements and a model</title><author><name sortKey="Quereix, Anne" sort="Quereix, Anne" uniqKey="Quereix A" first="Anne" last="Quereix">Anne Quereix</name><affiliation><mods:affiliation>Unité de Bioclimatologie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</mods:affiliation></affiliation></author><author><name sortKey="Dewar, Roderick C" sort="Dewar, Roderick C" uniqKey="Dewar R" first="Roderick C." last="Dewar">Roderick C. Dewar</name><affiliation><mods:affiliation>Unité de Bioclimatologie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</mods:affiliation></affiliation></author><author><name sortKey="Gaudillere, Jean Ierre" sort="Gaudillere, Jean Ierre" uniqKey="Gaudillere J" first="Jean-Pierre" last="Gaudillere">Jean-Pierre Gaudillere</name><affiliation><mods:affiliation>Unité d'Agronomie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</mods:affiliation></affiliation></author><author><name sortKey="Dayau, Sylvia" sort="Dayau, Sylvia" uniqKey="Dayau S" first="Sylvia" last="Dayau">Sylvia Dayau</name><affiliation><mods:affiliation>Unité de Bioclimatologie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</mods:affiliation></affiliation></author><author><name sortKey="Valancogne, Charles" sort="Valancogne, Charles" uniqKey="Valancogne C" first="Charles" last="Valancogne">Charles Valancogne</name><affiliation><mods:affiliation>Unité de Bioclimatologie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:4064D1692E9B0E97D34D177EB57B718D755F1261</idno><date when="2001" year="2001">2001</date><idno type="doi">10.1093/jexbot/52.365.2313</idno><idno type="url">https://api.istex.fr/document/4064D1692E9B0E97D34D177EB57B718D755F1261/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">002463</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">002463</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Sink feedback regulation of photosynthesis in vines: measurements and a model</title><author><name sortKey="Quereix, Anne" sort="Quereix, Anne" uniqKey="Quereix A" first="Anne" last="Quereix">Anne Quereix</name><affiliation><mods:affiliation>Unité de Bioclimatologie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</mods:affiliation></affiliation></author><author><name sortKey="Dewar, Roderick C" sort="Dewar, Roderick C" uniqKey="Dewar R" first="Roderick C." last="Dewar">Roderick C. Dewar</name><affiliation><mods:affiliation>Unité de Bioclimatologie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</mods:affiliation></affiliation></author><author><name sortKey="Gaudillere, Jean Ierre" sort="Gaudillere, Jean Ierre" uniqKey="Gaudillere J" first="Jean-Pierre" last="Gaudillere">Jean-Pierre Gaudillere</name><affiliation><mods:affiliation>Unité d'Agronomie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</mods:affiliation></affiliation></author><author><name sortKey="Dayau, Sylvia" sort="Dayau, Sylvia" uniqKey="Dayau S" first="Sylvia" last="Dayau">Sylvia Dayau</name><affiliation><mods:affiliation>Unité de Bioclimatologie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</mods:affiliation></affiliation></author><author><name sortKey="Valancogne, Charles" sort="Valancogne, Charles" uniqKey="Valancogne C" first="Charles" last="Valancogne">Charles Valancogne</name><affiliation><mods:affiliation>Unité de Bioclimatologie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Experimental Botany</title><title level="j" type="abbrev">J. Exp. Bot.</title><idno type="ISSN">0022-0957</idno><idno type="eISSN">1460-2431</idno><imprint><publisher>Oxford University Press</publisher><date type="published" when="2001-12-01">2001-12-01</date><biblScope unit="volume">52</biblScope><biblScope unit="issue">365</biblScope><biblScope unit="page" from="2313">2313</biblScope><biblScope unit="page" to="2322">2322</biblScope></imprint><idno type="ISSN">0022-0957</idno></series><idno type="istex">4064D1692E9B0E97D34D177EB57B718D755F1261</idno><idno type="DOI">10.1093/jexbot/52.365.2313</idno><idno type="PII">1460-2431</idno><idno type="local">522313</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0022-0957</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Vitis vinifera L.</term><term>feedback</term><term>model.</term><term>photosynthesis</term><term>sink</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">An experimental and modelling study of source–sink interactions in Vitis vinifera L., cv. Cabernet Sauvignon, rooted cuttings under non‐limiting environmental conditions with a 12 h photoperiod is presented here. After 4 h, measured photosynthesis, stomatal conductance and leaf carbohydrate content reached maximum values. Over the remainder of the photoperiod, photosynthesis and stomatal conductance decreased continuously, whereas leaf carbohydrate content remained relatively constant. Because the experiment took place in a non‐limiting environment, the results suggest that stomatal regulation of photosynthesis was mediated by an internal factor, possibly related to sink activity. A simple 1‐source, 2‐sink model was developed to examine the extent to which the data could be explained by a hypothetical sink‐to‐source feedback mechanism mediated by carbohydrate levels in either the mesophyll, the source phloem or the phloem of one of the two sinks. Model simulations reproduced the data well under the hypothesis of a phloem‐based feedback signal, although the data were insufficient to elucidate the detailed nature of such a signal. In a sensitivity analysis, the steady‐state response of photosynthesis to sink activity was explored and predictions made for the partitioning of photosynthate between the two sinks. The analysis highlights the effectiveness of a phloem‐based feedback signal in regulating the balance between source and sink activities. However, other mechanisms for the observed decline in photosynthesis, such as photoinhibition, endogenous circadian rhythms or hydraulic signals in the leaf cannot be excluded. Nevertheless, it is concluded that the phloem‐based feedback model developed here may provide a useful working hypothesis for incorporation into plant growth models and for further development and testing.</div></front></TEI><istex><corpusName>oup</corpusName><author><json:item><name>Anne Quereix</name><affiliations><json:string>Unité de Bioclimatologie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</json:string></affiliations></json:item><json:item><name>Roderick C. Dewar</name><affiliations><json:string>Unité de Bioclimatologie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</json:string></affiliations></json:item><json:item><name>Jean‐Pierre Gaudillere</name><affiliations><json:string>Unité d'Agronomie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</json:string></affiliations></json:item><json:item><name>Sylvia Dayau</name><affiliations><json:string>Unité de Bioclimatologie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</json:string></affiliations></json:item><json:item><name>Charles Valancogne</name><affiliations><json:string>Unité de Bioclimatologie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>Vitis vinifera L.</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>photosynthesis</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>sink</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>feedback</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>model.</value></json:item></subject><language><json:string>eng</json:string></language><originalGenre><json:string>other</json:string></originalGenre><abstract>An experimental and modelling study of source–sink interactions in Vitis vinifera L., cv. Cabernet Sauvignon, rooted cuttings under non‐limiting environmental conditions with a 12 h photoperiod is presented here. After 4 h, measured photosynthesis, stomatal conductance and leaf carbohydrate content reached maximum values. Over the remainder of the photoperiod, photosynthesis and stomatal conductance decreased continuously, whereas leaf carbohydrate content remained relatively constant. Because the experiment took place in a non‐limiting environment, the results suggest that stomatal regulation of photosynthesis was mediated by an internal factor, possibly related to sink activity. A simple 1‐source, 2‐sink model was developed to examine the extent to which the data could be explained by a hypothetical sink‐to‐source feedback mechanism mediated by carbohydrate levels in either the mesophyll, the source phloem or the phloem of one of the two sinks. Model simulations reproduced the data well under the hypothesis of a phloem‐based feedback signal, although the data were insufficient to elucidate the detailed nature of such a signal. In a sensitivity analysis, the steady‐state response of photosynthesis to sink activity was explored and predictions made for the partitioning of photosynthate between the two sinks. The analysis highlights the effectiveness of a phloem‐based feedback signal in regulating the balance between source and sink activities. However, other mechanisms for the observed decline in photosynthesis, such as photoinhibition, endogenous circadian rhythms or hydraulic signals in the leaf cannot be excluded. Nevertheless, it is concluded that the phloem‐based feedback model developed here may provide a useful working hypothesis for incorporation into plant growth models and for further development and testing.</abstract><qualityIndicators><score>10</score><pdfVersion>1.3</pdfVersion><pdfPageSize>586 x 791 pts</pdfPageSize><refBibsNative>true</refBibsNative><keywordCount>5</keywordCount><abstractCharCount>1850</abstractCharCount><pdfWordCount>5733</pdfWordCount><pdfCharCount>34488</pdfCharCount><pdfPageCount>10</pdfPageCount><abstractWordCount>258</abstractWordCount></qualityIndicators><title>Sink feedback regulation of photosynthesis in vines: measurements and a model</title><pii><json:string>1460-2431</json:string></pii><refBibs><json:item><host><volume>29</volume><pages><first>199</first></pages><author></author><title>Vitis</title></host></json:item><json:item><host><volume>45</volume><pages><first>1235</first></pages><author></author><title>Journal of Experimental Botany</title></host></json:item><json:item><host><volume>150</volume><pages><first>743</first></pages><author></author><title>Journal of Plant Physiology</title></host></json:item><json:item><host><volume>70</volume><pages><first>639</first></pages><author></author><title>Physiologia Plantarum</title></host></json:item><json:item><host><volume>41</volume><pages><first>417</first></pages><author></author><title>Journal of Experimental Botany</title></host></json:item><json:item><host><volume>18</volume><pages><first>511</first></pages><author></author><title>Plant, Cell and Environment</title></host></json:item><json:item><host><volume>7</volume><pages><first>356</first></pages><author></author><title>Functional Ecology</title></host></json:item><json:item><host><volume>105</volume><pages><first>71</first></pages><author></author><title>New Phytologist</title></host></json:item><json:item><host><pages><first>45</first></pages><author></author><title>Carbon partitioning and source–sinks interactions in plants</title></host></json:item><json:item><host><pages><first>729</first></pages><author></author><title>Research in photosynthesis</title></host></json:item><json:item><host><volume>34</volume><pages><first>201</first></pages><author></author><title>Vitis</title></host></json:item><json:item><host><volume>6</volume><pages><first>1665</first></pages><author></author><title>The Plant Cell</title></host></json:item><json:item><host><volume>4</volume><pages><first>59</first></pages><author></author><title>The Plant Cell</title></host></json:item><json:item><host><volume>47</volume><pages><first>1179</first></pages><author></author><title>Journal of Experimental Botany</title></host></json:item><json:item><host><volume>27</volume><pages><first>497</first></pages><author></author><title>Australian Journal of Plant Physiology</title></host></json:item><json:item><host><pages><first>163</first></pages><author></author><title>Methods in enzymatic analysis</title></host></json:item><json:item><host><volume>44</volume><pages><first>947</first></pages><author></author><title>Journal of Experimental Botany</title></host></json:item><json:item><host><volume>49</volume><pages><first>251</first></pages><author></author><title>American Journal of Enology and Viticulture</title></host></json:item><json:item><host><volume>4</volume><pages><first>437</first></pages><author></author><title>Agronomie</title></host></json:item><json:item><host><volume>20</volume><pages><first>309</first></pages><author></author><title>Australian Journal of Plant Physiology</title></host></json:item><json:item><host><volume>39</volume><pages><first>427</first></pages><author></author><title>Photosynthesis Research</title></host></json:item><json:item><host><volume>36</volume><pages><first>431</first></pages><author></author><title>Annals of Botany</title></host></json:item><json:item><host><author></author><title>Plant and crop modelling</title></host></json:item><json:item><host><volume>153</volume><pages><first>376</first></pages><author></author><title>Planta</title></host></json:item><json:item><host><volume>116</volume><pages><first>341</first></pages><author></author><title>New Phytologist</title></host></json:item></refBibs><genre><json:string>other</json:string></genre><host><volume>52</volume><publisherId><json:string>exbotj</json:string></publisherId><pages><last>2322</last><first>2313</first></pages><issn><json:string>0022-0957</json:string></issn><issue>365</issue><genre><json:string>journal</json:string></genre><language><json:string>unknown</json:string></language><eissn><json:string>1460-2431</json:string></eissn><title>Journal of Experimental Botany</title></host><categories><wos><json:string>science</json:string><json:string>plant sciences</json:string></wos><scienceMetrix><json:string>natural sciences</json:string><json:string>biology</json:string><json:string>plant biology & botany</json:string></scienceMetrix></categories><publicationDate>2001</publicationDate><copyrightDate>2001</copyrightDate><doi><json:string>10.1093/jexbot/52.365.2313</json:string></doi><id>4064D1692E9B0E97D34D177EB57B718D755F1261</id><score>0.22238424</score><fulltext><json:item><extension>pdf</extension><original>true</original><mimetype>application/pdf</mimetype><uri>https://api.istex.fr/document/4064D1692E9B0E97D34D177EB57B718D755F1261/fulltext/pdf</uri></json:item><json:item><extension>zip</extension><original>false</original><mimetype>application/zip</mimetype><uri>https://api.istex.fr/document/4064D1692E9B0E97D34D177EB57B718D755F1261/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/4064D1692E9B0E97D34D177EB57B718D755F1261/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">Sink feedback regulation of photosynthesis in vines: measurements and a model</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>Oxford University Press</publisher><availability><p>© Society for Experimental Biology</p></availability><date>2001</date></publicationStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">Sink feedback regulation of photosynthesis in vines: measurements and a model</title><author xml:id="author-1"><persName><forename type="first">Anne</forename><surname>Quereix</surname></persName><affiliation>Unité de Bioclimatologie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</affiliation></author><author xml:id="author-2"><persName><forename type="first">Roderick C.</forename><surname>Dewar</surname></persName><affiliation>Unité de Bioclimatologie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</affiliation></author><author xml:id="author-3"><persName><forename type="first">Jean‐Pierre</forename><surname>Gaudillere</surname></persName><affiliation>Unité d'Agronomie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</affiliation></author><author xml:id="author-4"><persName><forename type="first">Sylvia</forename><surname>Dayau</surname></persName><affiliation>Unité de Bioclimatologie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</affiliation></author><author xml:id="author-5"><persName><forename type="first">Charles</forename><surname>Valancogne</surname></persName><affiliation>Unité de Bioclimatologie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</affiliation></author></analytic><monogr><title level="j">Journal of Experimental Botany</title><title level="j" type="abbrev">J. Exp. Bot.</title><idno type="pISSN">0022-0957</idno><idno type="eISSN">1460-2431</idno><imprint><publisher>Oxford University Press</publisher><date type="published" when="2001-12-01"></date><biblScope unit="volume">52</biblScope><biblScope unit="issue">365</biblScope><biblScope unit="page" from="2313">2313</biblScope><biblScope unit="page" to="2322">2322</biblScope></imprint></monogr><idno type="istex">4064D1692E9B0E97D34D177EB57B718D755F1261</idno><idno type="DOI">10.1093/jexbot/52.365.2313</idno><idno type="PII">1460-2431</idno><idno type="local">522313</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2001</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>An experimental and modelling study of source–sink interactions in Vitis vinifera L., cv. Cabernet Sauvignon, rooted cuttings under non‐limiting environmental conditions with a 12 h photoperiod is presented here. After 4 h, measured photosynthesis, stomatal conductance and leaf carbohydrate content reached maximum values. Over the remainder of the photoperiod, photosynthesis and stomatal conductance decreased continuously, whereas leaf carbohydrate content remained relatively constant. Because the experiment took place in a non‐limiting environment, the results suggest that stomatal regulation of photosynthesis was mediated by an internal factor, possibly related to sink activity. A simple 1‐source, 2‐sink model was developed to examine the extent to which the data could be explained by a hypothetical sink‐to‐source feedback mechanism mediated by carbohydrate levels in either the mesophyll, the source phloem or the phloem of one of the two sinks. Model simulations reproduced the data well under the hypothesis of a phloem‐based feedback signal, although the data were insufficient to elucidate the detailed nature of such a signal. In a sensitivity analysis, the steady‐state response of photosynthesis to sink activity was explored and predictions made for the partitioning of photosynthate between the two sinks. The analysis highlights the effectiveness of a phloem‐based feedback signal in regulating the balance between source and sink activities. However, other mechanisms for the observed decline in photosynthesis, such as photoinhibition, endogenous circadian rhythms or hydraulic signals in the leaf cannot be excluded. Nevertheless, it is concluded that the phloem‐based feedback model developed here may provide a useful working hypothesis for incorporation into plant growth models and for further development and testing.</p></abstract><textClass xml:lang="en"><keywords scheme="keyword"><list><head>KWD</head><item><term>Vitis vinifera L.</term></item><item><term>photosynthesis</term></item><item><term>sink</term></item><item><term>feedback</term></item><item><term>model.</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2001-12-01">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/4064D1692E9B0E97D34D177EB57B718D755F1261/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="corpus oup" wicri:toSee="no header"><istex:xmlDeclaration>version="1.0" encoding="US-ASCII"</istex:xmlDeclaration><istex:docType PUBLIC="-//NLM//DTD Journal Publishing DTD v2.3 20070202//EN" URI="journalpublishing.dtd" name="istex:docType"></istex:docType><istex:document><article xml:lang="en" article-type="other"><front><journal-meta><journal-id journal-id-type="hwp">jexbot</journal-id><journal-id journal-id-type="nlm-ta">J Exp Bot</journal-id><journal-id journal-id-type="publisher-id">exbotj</journal-id><journal-title>Journal of Experimental Botany</journal-title><abbrev-journal-title abbrev-type="publisher">J. Exp. Bot.</abbrev-journal-title><issn pub-type="ppub">0022-0957</issn><issn pub-type="epub">1460-2431</issn><publisher><publisher-name>Oxford University Press</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="other">522313</article-id><article-id pub-id-type="doi">10.1093/jexbot/52.365.2313</article-id><article-id pub-id-type="pii">1460-2431</article-id><article-categories><subj-group subj-group-type="heading"><subject>Regulation of Growth, Development and Whole Organism Physiology</subject></subj-group></article-categories><title-group><article-title>Sink feedback regulation of photosynthesis in vines: measurements and a model</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Quereix</surname><given-names>Anne</given-names></name><xref rid="AFF1"><sup>1</sup></xref></contrib><contrib contrib-type="author"><name><surname>Dewar</surname><given-names>Roderick C.</given-names></name><xref rid="AFF1"><sup>1</sup></xref><xref rid="FN1"><sup>3</sup></xref></contrib><contrib contrib-type="author"><name><surname>Gaudillere</surname><given-names>Jean‐Pierre</given-names></name><xref rid="AFF2"><sup>2</sup></xref></contrib><contrib contrib-type="author"><name><surname>Dayau</surname><given-names>Sylvia</given-names></name><xref rid="AFF1"><sup>1</sup></xref></contrib><contrib contrib-type="author"><name><surname>Valancogne</surname><given-names>Charles</given-names></name><xref rid="AFF1"><sup>1</sup></xref></contrib><aff id="AFF1"><label>1</label>Unité de Bioclimatologie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</aff><aff id="AFF2"><label>2</label>Unité d'Agronomie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</aff></contrib-group><pub-date pub-type="ppub"><day>1</day><month>12</month><year>2001</year></pub-date><volume>52</volume><issue>365</issue><fpage>2313</fpage><lpage>2322</lpage><history><date date-type="accepted"><day>6</day><month>07</month><year>2001</year></date><date date-type="received"><day>30</day><month>01</month><year>2001</year></date></history><permissions><copyright-statement>© Society for Experimental Biology</copyright-statement><copyright-year>2001</copyright-year></permissions><abstract xml:lang="en"><p>An experimental and modelling study of source–sink interactions in <italic>Vitis vinifera</italic> L., cv. Cabernet Sauvignon, rooted cuttings under non‐limiting environmental conditions with a 12 h photoperiod is presented here. After 4 h, measured photosynthesis, stomatal conductance and leaf carbohydrate content reached maximum values. Over the remainder of the photoperiod, photosynthesis and stomatal conductance decreased continuously, whereas leaf carbohydrate content remained relatively constant. Because the experiment took place in a non‐limiting environment, the results suggest that stomatal regulation of photosynthesis was mediated by an internal factor, possibly related to sink activity. A simple 1‐source, 2‐sink model was developed to examine the extent to which the data could be explained by a hypothetical sink‐to‐source feedback mechanism mediated by carbohydrate levels in either the mesophyll, the source phloem or the phloem of one of the two sinks. Model simulations reproduced the data well under the hypothesis of a phloem‐based feedback signal, although the data were insufficient to elucidate the detailed nature of such a signal. In a sensitivity analysis, the steady‐state response of photosynthesis to sink activity was explored and predictions made for the partitioning of photosynthate between the two sinks. The analysis highlights the effectiveness of a phloem‐based feedback signal in regulating the balance between source and sink activities. However, other mechanisms for the observed decline in photosynthesis, such as photoinhibition, endogenous circadian rhythms or hydraulic signals in the leaf cannot be excluded. Nevertheless, it is concluded that the phloem‐based feedback model developed here may provide a useful working hypothesis for incorporation into plant growth models and for further development and testing.</p></abstract><kwd-group kwd-group-type="KWD" xml:lang="en"><kwd><italic>Vitis vinifera</italic> L.</kwd><kwd>photosynthesis</kwd><kwd>sink</kwd><kwd>feedback</kwd><kwd>model.</kwd></kwd-group><custom-meta-wrap><custom-meta><meta-name>hwp-legacy-fpage</meta-name><meta-value>2313</meta-value></custom-meta><custom-meta><meta-name>hwp-legacy-dochead</meta-name><meta-value>Original Papers</meta-value></custom-meta></custom-meta-wrap></article-meta></front></article></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Sink feedback regulation of photosynthesis in vines: measurements and a model</title></titleInfo><titleInfo type="alternative" lang="en" contentType="CDATA"><title>Sink feedback regulation of photosynthesis in vines: measurements and a model</title></titleInfo><name type="personal"><namePart type="given">Anne</namePart><namePart type="family">Quereix</namePart><affiliation>Unité de Bioclimatologie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Roderick C.</namePart><namePart type="family">Dewar</namePart><affiliation>Unité de Bioclimatologie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Jean‐Pierre</namePart><namePart type="family">Gaudillere</namePart><affiliation>Unité d'Agronomie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Sylvia</namePart><namePart type="family">Dayau</namePart><affiliation>Unité de Bioclimatologie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Charles</namePart><namePart type="family">Valancogne</namePart><affiliation>Unité de Bioclimatologie, INRA, Centre de Bordeaux, BP81, 33883 Villenave d'Ornon CEDEX, France</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="other" displayLabel="other"></genre><originInfo><publisher>Oxford University Press</publisher><dateIssued encoding="w3cdtf">2001-12-01</dateIssued><copyrightDate encoding="w3cdtf">2001</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm><languageTerm type="code" authority="rfc3066">en</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="en">An experimental and modelling study of source–sink interactions in Vitis vinifera L., cv. Cabernet Sauvignon, rooted cuttings under non‐limiting environmental conditions with a 12 h photoperiod is presented here. After 4 h, measured photosynthesis, stomatal conductance and leaf carbohydrate content reached maximum values. Over the remainder of the photoperiod, photosynthesis and stomatal conductance decreased continuously, whereas leaf carbohydrate content remained relatively constant. Because the experiment took place in a non‐limiting environment, the results suggest that stomatal regulation of photosynthesis was mediated by an internal factor, possibly related to sink activity. A simple 1‐source, 2‐sink model was developed to examine the extent to which the data could be explained by a hypothetical sink‐to‐source feedback mechanism mediated by carbohydrate levels in either the mesophyll, the source phloem or the phloem of one of the two sinks. Model simulations reproduced the data well under the hypothesis of a phloem‐based feedback signal, although the data were insufficient to elucidate the detailed nature of such a signal. In a sensitivity analysis, the steady‐state response of photosynthesis to sink activity was explored and predictions made for the partitioning of photosynthate between the two sinks. The analysis highlights the effectiveness of a phloem‐based feedback signal in regulating the balance between source and sink activities. However, other mechanisms for the observed decline in photosynthesis, such as photoinhibition, endogenous circadian rhythms or hydraulic signals in the leaf cannot be excluded. Nevertheless, it is concluded that the phloem‐based feedback model developed here may provide a useful working hypothesis for incorporation into plant growth models and for further development and testing.</abstract><subject lang="en"><genre>KWD</genre><topic>Vitis vinifera L.</topic><topic>photosynthesis</topic><topic>sink</topic><topic>feedback</topic><topic>model.</topic></subject><relatedItem type="host"><titleInfo><title>Journal of Experimental Botany</title></titleInfo><titleInfo type="abbreviated"><title>J. Exp. Bot.</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">0022-0957</identifier><identifier type="eISSN">1460-2431</identifier><identifier type="PublisherID">exbotj</identifier><identifier type="PublisherID-hwp">jexbot</identifier><identifier type="PublisherID-nlm-ta">J Exp Bot</identifier><part><date>2001</date><detail type="volume"><caption>vol.</caption><number>52</number></detail><detail type="issue"><caption>no.</caption><number>365</number></detail><extent unit="pages"><start>2313</start><end>2322</end></extent></part></relatedItem><identifier type="istex">4064D1692E9B0E97D34D177EB57B718D755F1261</identifier><identifier type="DOI">10.1093/jexbot/52.365.2313</identifier><identifier type="PII">1460-2431</identifier><identifier type="local">522313</identifier><accessCondition type="use and reproduction" contentType="copyright">© Society for Experimental Biology</accessCondition><recordInfo><recordContentSource>OUP</recordContentSource></recordInfo></mods></metadata><annexes><json:item><extension>jpeg</extension><original>true</original><mimetype>image/jpeg</mimetype><uri>https://api.istex.fr/document/4064D1692E9B0E97D34D177EB57B718D755F1261/annexes/jpeg</uri></json:item><json:item><extension>gif</extension><original>true</original><mimetype>image/gif</mimetype><uri>https://api.istex.fr/document/4064D1692E9B0E97D34D177EB57B718D755F1261/annexes/gif</uri></json:item></annexes><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Sante/explor/ParkinsonFranceV1/Data/Istex/Corpus
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 002463 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Istex/Corpus/biblio.hfd -nk 002463 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Sante
|area= ParkinsonFranceV1
|flux= Istex
|étape= Corpus
|type= RBID
|clé= ISTEX:4064D1692E9B0E97D34D177EB57B718D755F1261
|texte= Sink feedback regulation of photosynthesis in vines: measurements and a model
}}
| This area was generated with Dilib version V0.6.29. |  |