The fraction of expanding to expanded leaves determines the biomass response of Populus to elevated CO2.
Identifieur interne : 004851 ( Main/Exploration ); précédent : 004850; suivant : 004852The fraction of expanding to expanded leaves determines the biomass response of Populus to elevated CO2.
Auteurs : D Alexander Wait [États-Unis] ; Clive G. Jones [États-Unis] ; Jules Wynn ; F Ian WoodwardSource :
- Oecologia [ 1432-1939 ] ; 1999.
Abstract
We examined whether the effects of elevated CO2 on growth of 1-year old Populus deltoides saplings was a function of the assimilation responses of particular leaf developmental stages. Saplings were grown for 100 days at ambient (approximately 350 ppm) and elevated (ambient + 200 ppm) CO2 in forced-air greenhouses. Biomass, biomass distribution, growth rates, and leaf initiation and expansion rates were unaffected by elevated CO2. Leaf nitrogen (N), the leaf C:N ratio, and leaf lignin concentrations were also unaffected. Carbon gain was significantly greater in expanding leaves of saplings grown at elevated compared to ambient CO2. The Rubisco content in expanding leaves was not affected by CO2 concentration. Carbon gain and Rubisco content were significantly lower in fully expanded leaves of saplings grown at elevated compared to ambient CO2, indicating CO2-induced down-regulation in fully expanded leaves. Elevated CO2 likely had no overall effect on biomass accumulation due to the more rapid decline in carbon gain as leaves matured in saplings grown at elevated compared to ambient CO2. This decline in carbon gain has been documented in other species and shown to be related to a balance between sink/source balance and acclimation. Our data suggest that variation in growth responses to elevated CO2 can result from differences in leaf assimilation responses in expanding versus expanded leaves as they develop under elevated CO2.
DOI: 10.1007/s004420050921
PubMed: 28308559
Affiliations:
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Jones</name><affiliation wicri:level="1"><nlm:affiliation>Institute of Ecosystem Studies, Millbrook, NY 12545, USA, , , , , , US.</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Institute of Ecosystem Studies, Millbrook, NY 12545, USA, , , , , </wicri:regionArea><wicri:noRegion></wicri:noRegion></affiliation></author><author><name sortKey="Wynn, Jules" sort="Wynn, Jules" uniqKey="Wynn J" first="Jules" last="Wynn">Jules Wynn</name><affiliation><nlm:affiliation>Department of Animal and Plant Sciences, University of Sheffield, Sheffield, S10 2UQ, UK, , , , , , GB.</nlm:affiliation><wicri:noCountry code="subField">GB</wicri:noCountry></affiliation></author><author><name sortKey="Woodward, F Ian" sort="Woodward, F Ian" uniqKey="Woodward F" first="F Ian" last="Woodward">F Ian Woodward</name><affiliation><nlm:affiliation>Department of Animal and Plant Sciences, University of Sheffield, Sheffield, S10 2UQ, UK, , , , , , GB.</nlm:affiliation><wicri:noCountry code="subField">GB</wicri:noCountry></affiliation></author></analytic><series><title level="j">Oecologia</title><idno type="eISSN">1432-1939</idno><imprint><date when="1999" type="published">1999</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">We examined whether the effects of elevated CO<sub>2</sub> on growth of 1-year old Populus deltoides saplings was a function of the assimilation responses of particular leaf developmental stages. Saplings were grown for 100 days at ambient (approximately 350 ppm) and elevated (ambient + 200 ppm) CO<sub>2</sub> in forced-air greenhouses. Biomass, biomass distribution, growth rates, and leaf initiation and expansion rates were unaffected by elevated CO<sub>2</sub>. Leaf nitrogen (N), the leaf C:N ratio, and leaf lignin concentrations were also unaffected. Carbon gain was significantly greater in expanding leaves of saplings grown at elevated compared to ambient CO<sub>2</sub>. The Rubisco content in expanding leaves was not affected by CO<sub>2</sub> concentration. Carbon gain and Rubisco content were significantly lower in fully expanded leaves of saplings grown at elevated compared to ambient CO<sub>2</sub>, indicating CO<sub>2</sub>-induced down-regulation in fully expanded leaves. Elevated CO<sub>2</sub> likely had no overall effect on biomass accumulation due to the more rapid decline in carbon gain as leaves matured in saplings grown at elevated compared to ambient CO<sub>2</sub>. This decline in carbon gain has been documented in other species and shown to be related to a balance between sink/source balance and acclimation. Our data suggest that variation in growth responses to elevated CO<sub>2</sub> can result from differences in leaf assimilation responses in expanding versus expanded leaves as they develop under elevated CO<sub>2</sub>.</div></front></TEI><pubmed><MedlineCitation Status="PubMed-not-MEDLINE" Owner="NLM"><PMID Version="1">28308559</PMID><DateRevised><Year>2019</Year><Month>11</Month><Day>20</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Electronic">1432-1939</ISSN><JournalIssue CitedMedium="Internet"><Volume>121</Volume><Issue>2</Issue><PubDate><Year>1999</Year><Month>Nov</Month></PubDate></JournalIssue><Title>Oecologia</Title><ISOAbbreviation>Oecologia</ISOAbbreviation></Journal><ArticleTitle>The fraction of expanding to expanded leaves determines the biomass response of Populus to elevated CO<sub>2</sub>.</ArticleTitle><Pagination><MedlinePgn>193-200</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1007/s004420050921</ELocationID><Abstract><AbstractText>We examined whether the effects of elevated CO<sub>2</sub> on growth of 1-year old Populus deltoides saplings was a function of the assimilation responses of particular leaf developmental stages. Saplings were grown for 100 days at ambient (approximately 350 ppm) and elevated (ambient + 200 ppm) CO<sub>2</sub> in forced-air greenhouses. Biomass, biomass distribution, growth rates, and leaf initiation and expansion rates were unaffected by elevated CO<sub>2</sub>. Leaf nitrogen (N), the leaf C:N ratio, and leaf lignin concentrations were also unaffected. Carbon gain was significantly greater in expanding leaves of saplings grown at elevated compared to ambient CO<sub>2</sub>. The Rubisco content in expanding leaves was not affected by CO<sub>2</sub> concentration. Carbon gain and Rubisco content were significantly lower in fully expanded leaves of saplings grown at elevated compared to ambient CO<sub>2</sub>, indicating CO<sub>2</sub>-induced down-regulation in fully expanded leaves. Elevated CO<sub>2</sub> likely had no overall effect on biomass accumulation due to the more rapid decline in carbon gain as leaves matured in saplings grown at elevated compared to ambient CO<sub>2</sub>. This decline in carbon gain has been documented in other species and shown to be related to a balance between sink/source balance and acclimation. Our data suggest that variation in growth responses to elevated CO<sub>2</sub> can result from differences in leaf assimilation responses in expanding versus expanded leaves as they develop under elevated CO<sub>2</sub>.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Wait</LastName><ForeName>D Alexander</ForeName><Initials>DA</Initials><AffiliationInfo><Affiliation>Institute of Ecosystem Studies, Millbrook, NY 12545, USA, , , , , , US.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Jones</LastName><ForeName>Clive G</ForeName><Initials>CG</Initials><AffiliationInfo><Affiliation>Institute of Ecosystem Studies, Millbrook, NY 12545, USA, , , , , , US.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Wynn</LastName><ForeName>Jules</ForeName><Initials>J</Initials><AffiliationInfo><Affiliation>Department of Animal and Plant Sciences, University of Sheffield, Sheffield, S10 2UQ, UK, , , , , , GB.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Woodward</LastName><ForeName>F Ian</ForeName><Initials>FI</Initials><AffiliationInfo><Affiliation>Department of Animal and Plant Sciences, University of Sheffield, Sheffield, S10 2UQ, UK, , , , , , GB.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>Germany</Country><MedlineTA>Oecologia</MedlineTA><NlmUniqueID>0150372</NlmUniqueID><ISSNLinking>0029-8549</ISSNLinking></MedlineJournalInfo><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Biomass accumulation</Keyword><Keyword MajorTopicYN="N">Gas exchange</Keyword><Keyword MajorTopicYN="N">Key words Elevated CO2</Keyword><Keyword MajorTopicYN="N">Leaf development</Keyword><Keyword MajorTopicYN="N">Rubisco</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2017</Year><Month>3</Month><Day>18</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>1999</Year><Month>11</Month><Day>1</Day><Hour>0</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>1999</Year><Month>11</Month><Day>1</Day><Hour>0</Hour><Minute>1</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">28308559</ArticleId><ArticleId IdType="doi">10.1007/s004420050921</ArticleId><ArticleId IdType="pii">10.1007/s004420050921</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>États-Unis</li></country></list><tree><noCountry><name sortKey="Woodward, F Ian" sort="Woodward, F Ian" uniqKey="Woodward F" first="F Ian" last="Woodward">F Ian Woodward</name><name sortKey="Wynn, Jules" sort="Wynn, Jules" uniqKey="Wynn J" first="Jules" last="Wynn">Jules Wynn</name></noCountry><country name="États-Unis"><noRegion><name sortKey="Wait, D Alexander" sort="Wait, D Alexander" uniqKey="Wait D" first="D Alexander" last="Wait">D Alexander Wait</name></noRegion><name sortKey="Jones, Clive G" sort="Jones, Clive G" uniqKey="Jones C" first="Clive G" last="Jones">Clive G. 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