Grassland species will not necessarily benefit from future elevated air temperatures: a chlorophyll fluorescence approach to study autumn physiology
Identifieur interne : 000C43 ( Istex/Corpus ); précédent : 000C42; suivant : 000C44Grassland species will not necessarily benefit from future elevated air temperatures: a chlorophyll fluorescence approach to study autumn physiology
Auteurs : Birgit Gielen ; Hans J. De Boeck ; Catherine M. H. M. Lemmens ; Roland Valcke ; Ivan Nijs ; Reinhart CeulemansSource :
- Physiologia Plantarum [ 0031-9317 ] ; 2005-09.
Abstract
Model ecosystems were grown in 12 sunlit, climate‐controlled chambers to gain insight into the effects of elevated (+3°C) air temperature (Tair) on temperate grasslands. In this study, the hypothesis of delayed senescence in response to elevated Tair was tested for Rumex acetosa L. and Plantago lanceolata L. During the autumn of the first treatment year, frequent measurements were made of leaf chlorophyll a (Chla) fluorescence transients. Chl fluorescence images of individual leaves as well as digital colour images of these ecosystems were captured. Chl fluorescence variables, such as the maximum quantum yield of primary photochemistry (Fv/Fm), indicated a decreasing efficiency with time. Despite no treatment effect on Fv/Fm, other variables derived from the Chl fluorescence transients showed a strong trend towards a positive effect of a 3°C temperature increase on the photosynthetic performance of R. acetosa and P. lanceolata in the first year. After mid‐September, the initial positive treatment effect disappeared for R. acetosa, strongly suggesting that leaf lifespan of this species was shortened by higher Tair. One possible explanation is more intense drought stress in the elevated compared to the ambient temperature treatments. Second‐year measurements were possibly too limited in time to confirm this trend. These results show that temperate grassland species may take advantage of a future increase in Tair during autumn. This will ultimately depend on the species' degree of acclimation to a temperature change and on the resistance to drought stress.
Url:
DOI: 10.1111/j.1399-3054.2005.00539.x
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De Boeck</name><affiliation><mods:affiliation>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</mods:affiliation></affiliation></author><author><name sortKey="Lemmens, Catherine M H M" sort="Lemmens, Catherine M H M" uniqKey="Lemmens C" first="Catherine M. H. M." last="Lemmens">Catherine M. H. M. Lemmens</name><affiliation><mods:affiliation>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</mods:affiliation></affiliation></author><author><name sortKey="Valcke, Roland" sort="Valcke, Roland" uniqKey="Valcke R" first="Roland" last="Valcke">Roland Valcke</name><affiliation><mods:affiliation>Laboratory of Molecular and Physical Plant Physiology Department SBG, Limburgs Universitair Centrum, Diepenbeek, Belgium</mods:affiliation></affiliation></author><author><name sortKey="Nijs, Ivan" sort="Nijs, Ivan" uniqKey="Nijs I" first="Ivan" last="Nijs">Ivan Nijs</name><affiliation><mods:affiliation>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</mods:affiliation></affiliation></author><author><name sortKey="Ceulemans, Reinhart" sort="Ceulemans, Reinhart" uniqKey="Ceulemans R" first="Reinhart" last="Ceulemans">Reinhart Ceulemans</name><affiliation><mods:affiliation>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:74AD21644774DA4F7EBA1A04184CD500A93E1FF3</idno><date when="2005" year="2005">2005</date><idno type="doi">10.1111/j.1399-3054.2005.00539.x</idno><idno type="url">https://api.istex.fr/document/74AD21644774DA4F7EBA1A04184CD500A93E1FF3/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000C43</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000C43</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Grassland species will not necessarily benefit from future elevated air temperatures: a chlorophyll fluorescence approach to study autumn physiology</title><author><name sortKey="Gielen, Birgit" sort="Gielen, Birgit" uniqKey="Gielen B" first="Birgit" last="Gielen">Birgit Gielen</name><affiliation><mods:affiliation>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</mods:affiliation></affiliation><affiliation><mods:affiliation>E-mail: birgit.gielen@ua.ac.be</mods:affiliation></affiliation></author><author><name sortKey="De Boeck, Hans J" sort="De Boeck, Hans J" uniqKey="De Boeck H" first="Hans J." last="De Boeck">Hans J. De Boeck</name><affiliation><mods:affiliation>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</mods:affiliation></affiliation></author><author><name sortKey="Lemmens, Catherine M H M" sort="Lemmens, Catherine M H M" uniqKey="Lemmens C" first="Catherine M. H. M." last="Lemmens">Catherine M. H. M. Lemmens</name><affiliation><mods:affiliation>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</mods:affiliation></affiliation></author><author><name sortKey="Valcke, Roland" sort="Valcke, Roland" uniqKey="Valcke R" first="Roland" last="Valcke">Roland Valcke</name><affiliation><mods:affiliation>Laboratory of Molecular and Physical Plant Physiology Department SBG, Limburgs Universitair Centrum, Diepenbeek, Belgium</mods:affiliation></affiliation></author><author><name sortKey="Nijs, Ivan" sort="Nijs, Ivan" uniqKey="Nijs I" first="Ivan" last="Nijs">Ivan Nijs</name><affiliation><mods:affiliation>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</mods:affiliation></affiliation></author><author><name sortKey="Ceulemans, Reinhart" sort="Ceulemans, Reinhart" uniqKey="Ceulemans R" first="Reinhart" last="Ceulemans">Reinhart Ceulemans</name><affiliation><mods:affiliation>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Physiologia Plantarum</title><idno type="ISSN">0031-9317</idno><idno type="eISSN">1399-3054</idno><imprint><publisher>Munksgaard International Publishers</publisher><pubPlace>Oxford, UK; Malden, USA</pubPlace><date type="published" when="2005-09">2005-09</date><biblScope unit="volume">125</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="52">52</biblScope><biblScope unit="page" to="63">63</biblScope></imprint><idno type="ISSN">0031-9317</idno></series><idno type="istex">74AD21644774DA4F7EBA1A04184CD500A93E1FF3</idno><idno type="DOI">10.1111/j.1399-3054.2005.00539.x</idno><idno type="ArticleID">PPL539</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0031-9317</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Model ecosystems were grown in 12 sunlit, climate‐controlled chambers to gain insight into the effects of elevated (+3°C) air temperature (Tair) on temperate grasslands. In this study, the hypothesis of delayed senescence in response to elevated Tair was tested for Rumex acetosa L. and Plantago lanceolata L. During the autumn of the first treatment year, frequent measurements were made of leaf chlorophyll a (Chla) fluorescence transients. Chl fluorescence images of individual leaves as well as digital colour images of these ecosystems were captured. Chl fluorescence variables, such as the maximum quantum yield of primary photochemistry (Fv/Fm), indicated a decreasing efficiency with time. Despite no treatment effect on Fv/Fm, other variables derived from the Chl fluorescence transients showed a strong trend towards a positive effect of a 3°C temperature increase on the photosynthetic performance of R. acetosa and P. lanceolata in the first year. After mid‐September, the initial positive treatment effect disappeared for R. acetosa, strongly suggesting that leaf lifespan of this species was shortened by higher Tair. One possible explanation is more intense drought stress in the elevated compared to the ambient temperature treatments. Second‐year measurements were possibly too limited in time to confirm this trend. These results show that temperate grassland species may take advantage of a future increase in Tair during autumn. This will ultimately depend on the species' degree of acclimation to a temperature change and on the resistance to drought stress.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>Birgit Gielen</name><affiliations><json:string>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</json:string><json:string>E-mail: birgit.gielen@ua.ac.be</json:string></affiliations></json:item><json:item><name>Hans J. De Boeck</name><affiliations><json:string>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</json:string></affiliations></json:item><json:item><name>Catherine M. H. M. Lemmens</name><affiliations><json:string>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</json:string></affiliations></json:item><json:item><name>Roland Valcke</name><affiliations><json:string>Laboratory of Molecular and Physical Plant Physiology Department SBG, Limburgs Universitair Centrum, Diepenbeek, Belgium</json:string></affiliations></json:item><json:item><name>Ivan Nijs</name><affiliations><json:string>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</json:string></affiliations></json:item><json:item><name>Reinhart Ceulemans</name><affiliations><json:string>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</json:string></affiliations></json:item></author><articleId><json:string>PPL539</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><abstract>Model ecosystems were grown in 12 sunlit, climate‐controlled chambers to gain insight into the effects of elevated (+3°C) air temperature (Tair) on temperate grasslands. In this study, the hypothesis of delayed senescence in response to elevated Tair was tested for Rumex acetosa L. and Plantago lanceolata L. During the autumn of the first treatment year, frequent measurements were made of leaf chlorophyll a (Chla) fluorescence transients. Chl fluorescence images of individual leaves as well as digital colour images of these ecosystems were captured. Chl fluorescence variables, such as the maximum quantum yield of primary photochemistry (Fv/Fm), indicated a decreasing efficiency with time. Despite no treatment effect on Fv/Fm, other variables derived from the Chl fluorescence transients showed a strong trend towards a positive effect of a 3°C temperature increase on the photosynthetic performance of R. acetosa and P. lanceolata in the first year. After mid‐September, the initial positive treatment effect disappeared for R. acetosa, strongly suggesting that leaf lifespan of this species was shortened by higher Tair. One possible explanation is more intense drought stress in the elevated compared to the ambient temperature treatments. Second‐year measurements were possibly too limited in time to confirm this trend. These results show that temperate grassland species may take advantage of a future increase in Tair during autumn. This will ultimately depend on the species' degree of acclimation to a temperature change and on the resistance to drought stress.</abstract><qualityIndicators><score>9.32</score><pdfVersion>1.6</pdfVersion><pdfPageSize>595 x 782 pts</pdfPageSize><refBibsNative>true</refBibsNative><abstractCharCount>1579</abstractCharCount><pdfWordCount>6975</pdfWordCount><pdfCharCount>43821</pdfCharCount><pdfPageCount>12</pdfPageCount><abstractWordCount>235</abstractWordCount></qualityIndicators><title>Grassland species will not necessarily benefit from future elevated air temperatures: a chlorophyll fluorescence approach to study autumn physiology</title><refBibs><json:item><author><json:item><name>K‐J Appenroth</name></json:item><json:item><name>J Stöckel</name></json:item><json:item><name>A Srivastava</name></json:item><json:item><name>RJ Strasser</name></json:item></author><host><volume>115</volume><pages><last>64</last><first>49</first></pages><author></author><title>Environ 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botany</json:string></scienceMetrix></categories><publicationDate>2005</publicationDate><copyrightDate>2005</copyrightDate><doi><json:string>10.1111/j.1399-3054.2005.00539.x</json:string></doi><id>74AD21644774DA4F7EBA1A04184CD500A93E1FF3</id><score>1</score><fulltext><json:item><extension>pdf</extension><original>true</original><mimetype>application/pdf</mimetype><uri>https://api.istex.fr/document/74AD21644774DA4F7EBA1A04184CD500A93E1FF3/fulltext/pdf</uri></json:item><json:item><extension>zip</extension><original>false</original><mimetype>application/zip</mimetype><uri>https://api.istex.fr/document/74AD21644774DA4F7EBA1A04184CD500A93E1FF3/fulltext/zip</uri></json:item><istex:fulltextTEI uri="https://api.istex.fr/document/74AD21644774DA4F7EBA1A04184CD500A93E1FF3/fulltext/tei"><teiHeader><fileDesc><titleStmt><title level="a" type="main" xml:lang="en">Grassland species will not necessarily benefit from future elevated air temperatures: a chlorophyll fluorescence approach to study autumn physiology</title></titleStmt><publicationStmt><authority>ISTEX</authority><publisher>Munksgaard International Publishers</publisher><pubPlace>Oxford, UK; Malden, USA</pubPlace><availability><p>WILEY</p></availability><date>2005</date></publicationStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">Grassland species will not necessarily benefit from future elevated air temperatures: a chlorophyll fluorescence approach to study autumn physiology</title><author xml:id="author-1"><persName><forename type="first">Birgit</forename><surname>Gielen</surname></persName><email>birgit.gielen@ua.ac.be</email><affiliation>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</affiliation></author><author xml:id="author-2"><persName><forename type="first">Hans J.</forename><surname>De Boeck</surname></persName><affiliation>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</affiliation></author><author xml:id="author-3"><persName><forename type="first">Catherine M. H. M.</forename><surname>Lemmens</surname></persName><affiliation>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</affiliation></author><author xml:id="author-4"><persName><forename type="first">Roland</forename><surname>Valcke</surname></persName><affiliation>Laboratory of Molecular and Physical Plant Physiology Department SBG, Limburgs Universitair Centrum, Diepenbeek, Belgium</affiliation></author><author xml:id="author-5"><persName><forename type="first">Ivan</forename><surname>Nijs</surname></persName><affiliation>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</affiliation></author><author xml:id="author-6"><persName><forename type="first">Reinhart</forename><surname>Ceulemans</surname></persName><affiliation>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</affiliation></author></analytic><monogr><title level="j">Physiologia Plantarum</title><idno type="pISSN">0031-9317</idno><idno type="eISSN">1399-3054</idno><idno type="DOI">10.1111/(ISSN)1399-3054</idno><imprint><publisher>Munksgaard International Publishers</publisher><pubPlace>Oxford, UK; Malden, USA</pubPlace><date type="published" when="2005-09"></date><biblScope unit="volume">125</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="52">52</biblScope><biblScope unit="page" to="63">63</biblScope></imprint></monogr><idno type="istex">74AD21644774DA4F7EBA1A04184CD500A93E1FF3</idno><idno type="DOI">10.1111/j.1399-3054.2005.00539.x</idno><idno type="ArticleID">PPL539</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2005</date></creation><langUsage><language ident="en">en</language></langUsage><abstract xml:lang="en"><p>Model ecosystems were grown in 12 sunlit, climate‐controlled chambers to gain insight into the effects of elevated (+3°C) air temperature (Tair) on temperate grasslands. In this study, the hypothesis of delayed senescence in response to elevated Tair was tested for Rumex acetosa L. and Plantago lanceolata L. During the autumn of the first treatment year, frequent measurements were made of leaf chlorophyll a (Chla) fluorescence transients. Chl fluorescence images of individual leaves as well as digital colour images of these ecosystems were captured. Chl fluorescence variables, such as the maximum quantum yield of primary photochemistry (Fv/Fm), indicated a decreasing efficiency with time. Despite no treatment effect on Fv/Fm, other variables derived from the Chl fluorescence transients showed a strong trend towards a positive effect of a 3°C temperature increase on the photosynthetic performance of R. acetosa and P. lanceolata in the first year. After mid‐September, the initial positive treatment effect disappeared for R. acetosa, strongly suggesting that leaf lifespan of this species was shortened by higher Tair. One possible explanation is more intense drought stress in the elevated compared to the ambient temperature treatments. Second‐year measurements were possibly too limited in time to confirm this trend. These results show that temperate grassland species may take advantage of a future increase in Tair during autumn. This will ultimately depend on the species' degree of acclimation to a temperature change and on the resistance to drought stress.</p></abstract></profileDesc><revisionDesc><change when="2005-09">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/74AD21644774DA4F7EBA1A04184CD500A93E1FF3/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component version="2.0" type="serialArticle" xml:lang="en"><header><publicationMeta level="product"><publisherInfo><publisherName>Munksgaard International Publishers</publisherName><publisherLoc>Oxford, UK; Malden, USA</publisherLoc></publisherInfo><doi origin="wiley" registered="yes">10.1111/(ISSN)1399-3054</doi><issn type="print">0031-9317</issn><issn type="electronic">1399-3054</issn><idGroup><id type="product" value="PPL"></id><id type="publisherDivision" value="ST"></id></idGroup><titleGroup><title type="main" sort="PHYSIOLOGIA PLANTARUM">Physiologia Plantarum</title></titleGroup></publicationMeta><publicationMeta level="part" position="09001"><doi origin="wiley">10.1111/ppl.2005.125.issue-1</doi><numberingGroup><numbering type="journalVolume" number="125">125</numbering><numbering type="journalIssue" number="1">1</numbering></numberingGroup><coverDate startDate="2005-09">September 2005</coverDate></publicationMeta><publicationMeta level="unit" type="article" position="6" status="forIssue"><doi origin="wiley">10.1111/j.1399-3054.2005.00539.x</doi><idGroup><id type="unit" value="PPL539"></id></idGroup><countGroup><count type="pageTotal" number="12"></count></countGroup><titleGroup><title type="tocHeading1">Ecophysiology, stress and adaptation</title></titleGroup><eventGroup><event type="firstOnline" date="2005-08-25"></event><event type="publishedOnlineFinalForm" date="2005-08-25"></event><event type="xmlConverted" agent="Converter:BPG_TO_WML3G version:2.3.6 mode:FullText source:FullText result:FullText" date="2010-04-21"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:3.8.8" date="2014-02-07"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.1.7 mode:FullText,remove_FC" date="2014-11-03"></event></eventGroup><numberingGroup><numbering type="pageFirst" number="52">52</numbering><numbering type="pageLast" number="63">63</numbering></numberingGroup><correspondenceTo> e‐mail: <email>birgit.gielen@ua.ac.be</email></correspondenceTo><linkGroup><link type="toTypesetVersion" href="file:PPL.PPL539.pdf"></link></linkGroup></publicationMeta><contentMeta><unparsedEditorialHistory>Received 1 April 2005; revised 9 May 2005</unparsedEditorialHistory><countGroup><count type="figureTotal" number="6"></count><count type="tableTotal" number="2"></count><count type="formulaTotal" number="0"></count><count type="referenceTotal" number="62"></count><count type="wordTotal" number="5819"></count><count type="linksPubMed" number="0"></count><count type="linksCrossRef" number="0"></count></countGroup><titleGroup><title type="main">Grassland species will not necessarily benefit from future elevated air temperatures: a chlorophyll fluorescence approach to study autumn physiology</title></titleGroup><creators><creator creatorRole="author" xml:id="cr1" affiliationRef="#a1" corresponding="yes"><personName><givenNames>Birgit</givenNames><familyName>Gielen</familyName></personName></creator><creator creatorRole="author" xml:id="cr2" affiliationRef="#a1"><personName><givenNames>Hans J.</givenNames><familyName>De Boeck</familyName></personName></creator><creator creatorRole="author" xml:id="cr3" affiliationRef="#a1"><personName><givenNames>Catherine M. H. M.</givenNames><familyName>Lemmens</familyName></personName></creator><creator creatorRole="author" xml:id="cr4" affiliationRef="#a3"><personName><givenNames>Roland</givenNames><familyName>Valcke</familyName></personName></creator><creator creatorRole="author" xml:id="cr5" affiliationRef="#a1"><personName><givenNames>Ivan</givenNames><familyName>Nijs</familyName></personName></creator><creator creatorRole="author" xml:id="cr6" affiliationRef="#a1"><personName><givenNames>Reinhart</givenNames><familyName>Ceulemans</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="a1" countryCode="BE"><unparsedAffiliation> Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium
</unparsedAffiliation></affiliation><affiliation xml:id="a3" countryCode="BE"><unparsedAffiliation>Laboratory of Molecular and Physical Plant Physiology Department SBG, Limburgs Universitair Centrum, Diepenbeek, Belgium</unparsedAffiliation></affiliation></affiliationGroup><abstractGroup><abstract type="main" xml:lang="en"><p>Model ecosystems were grown in 12 sunlit, climate‐controlled chambers to gain insight into the effects of elevated (+3°C) air temperature (T<sub>air</sub>) on temperate grasslands. In this study, the hypothesis of delayed senescence in response to elevated T<sub>air</sub> was tested for <i>Rumex acetosa</i> L. and <i>Plantago lanceolata</i> L. During the autumn of the first treatment year, frequent measurements were made of leaf chlorophyll <i>a</i> (Chl<i>a</i>) fluorescence transients. Chl fluorescence images of individual leaves as well as digital colour images of these ecosystems were captured. Chl fluorescence variables, such as the maximum quantum yield of primary photochemistry (F<sub>v</sub>/F<sub>m</sub>), indicated a decreasing efficiency with time. Despite no treatment effect on F<sub>v</sub>/F<sub>m</sub>, other variables derived from the Chl fluorescence transients showed a strong trend towards a positive effect of a 3°C temperature increase on the photosynthetic performance of <i>R. acetosa</i> and <i>P. lanceolata</i> in the first year. After mid‐September, the initial positive treatment effect disappeared for <i>R. acetosa</i>, strongly suggesting that leaf lifespan of this species was shortened by higher T<sub>air</sub>. One possible explanation is more intense drought stress in the elevated compared to the ambient temperature treatments. Second‐year measurements were possibly too limited in time to confirm this trend. These results show that temperate grassland species may take advantage of a future increase in T<sub>air</sub> during autumn. This will ultimately depend on the species' degree of acclimation to a temperature change and on the resistance to drought stress.</p></abstract></abstractGroup></contentMeta><noteGroup><note xml:id="n-fnt-1" numbered="no"><p>Edited by V. Hurry</p></note></noteGroup></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Grassland species will not necessarily benefit from future elevated air temperatures: a chlorophyll fluorescence approach to study autumn physiology</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Grassland species will not necessarily benefit from future elevated air temperatures: a chlorophyll fluorescence approach to study autumn physiology</title></titleInfo><name type="personal"><namePart type="given">Birgit</namePart><namePart type="family">Gielen</namePart><affiliation>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</affiliation><affiliation>E-mail: birgit.gielen@ua.ac.be</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Hans J.</namePart><namePart type="family">De Boeck</namePart><affiliation>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Catherine M. H. M.</namePart><namePart type="family">Lemmens</namePart><affiliation>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Roland</namePart><namePart type="family">Valcke</namePart><affiliation>Laboratory of Molecular and Physical Plant Physiology Department SBG, Limburgs Universitair Centrum, Diepenbeek, Belgium</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Ivan</namePart><namePart type="family">Nijs</namePart><affiliation>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Reinhart</namePart><namePart type="family">Ceulemans</namePart><affiliation>Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Munksgaard International Publishers</publisher><place><placeTerm type="text">Oxford, UK; Malden, USA</placeTerm></place><dateIssued encoding="w3cdtf">2005-09</dateIssued><edition>Received 1 April 2005; revised 9 May 2005</edition><copyrightDate encoding="w3cdtf">2005</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">6</extent><extent unit="tables">2</extent><extent unit="references">62</extent><extent unit="words">5819</extent></physicalDescription><abstract lang="en">Model ecosystems were grown in 12 sunlit, climate‐controlled chambers to gain insight into the effects of elevated (+3°C) air temperature (Tair) on temperate grasslands. In this study, the hypothesis of delayed senescence in response to elevated Tair was tested for Rumex acetosa L. and Plantago lanceolata L. During the autumn of the first treatment year, frequent measurements were made of leaf chlorophyll a (Chla) fluorescence transients. Chl fluorescence images of individual leaves as well as digital colour images of these ecosystems were captured. Chl fluorescence variables, such as the maximum quantum yield of primary photochemistry (Fv/Fm), indicated a decreasing efficiency with time. Despite no treatment effect on Fv/Fm, other variables derived from the Chl fluorescence transients showed a strong trend towards a positive effect of a 3°C temperature increase on the photosynthetic performance of R. acetosa and P. lanceolata in the first year. After mid‐September, the initial positive treatment effect disappeared for R. acetosa, strongly suggesting that leaf lifespan of this species was shortened by higher Tair. One possible explanation is more intense drought stress in the elevated compared to the ambient temperature treatments. Second‐year measurements were possibly too limited in time to confirm this trend. These results show that temperate grassland species may take advantage of a future increase in Tair during autumn. This will ultimately depend on the species' degree of acclimation to a temperature change and on the resistance to drought stress.</abstract><relatedItem type="host"><titleInfo><title>Physiologia Plantarum</title></titleInfo><genre type="journal">journal</genre><identifier type="ISSN">0031-9317</identifier><identifier type="eISSN">1399-3054</identifier><identifier type="DOI">10.1111/(ISSN)1399-3054</identifier><identifier type="PublisherID">PPL</identifier><part><date>2005</date><detail type="volume"><caption>vol.</caption><number>125</number></detail><detail type="issue"><caption>no.</caption><number>1</number></detail><extent unit="pages"><start>52</start><end>63</end><total>12</total></extent></part></relatedItem><identifier type="istex">74AD21644774DA4F7EBA1A04184CD500A93E1FF3</identifier><identifier type="DOI">10.1111/j.1399-3054.2005.00539.x</identifier><identifier type="ArticleID">PPL539</identifier><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>Munksgaard International Publishers</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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