Increased CO2 uncouples growth from isoprene emission in an agriforest ecosystem.
Identifieur interne : 004430 ( Main/Exploration ); précédent : 004429; suivant : 004431Increased CO2 uncouples growth from isoprene emission in an agriforest ecosystem.
Auteurs : Todd N. Rosenstiel [États-Unis] ; Mark J. Potosnak ; Kevin L. Griffin ; Ray Fall ; Russell K. MonsonSource :
- Nature [ 0028-0836 ] ; 2003.
Descripteurs français
- KwdFr :
- Arbres (croissance et développement), Arbres (effets des médicaments et des substances chimiques), Arbres (métabolisme), Atmosphère (composition chimique), Biomasse (MeSH), Butadiènes (métabolisme), Dioxyde de carbone (métabolisme), Dioxyde de carbone (pharmacologie), Feuilles de plante (effets des médicaments et des substances chimiques), Feuilles de plante (métabolisme), Hémiterpènes (MeSH), Pentanes (MeSH), Photosynthèse (effets des médicaments et des substances chimiques), Populus (croissance et développement), Populus (effets des médicaments et des substances chimiques), Populus (métabolisme), Écosystème (MeSH).
- MESH :
- composition chimique : Atmosphère.
- croissance et développement : Arbres, Populus.
- effets des médicaments et des substances chimiques : Arbres, Feuilles de plante, Photosynthèse, Populus.
- métabolisme : Arbres, Butadiènes, Dioxyde de carbone, Feuilles de plante, Populus.
- pharmacologie : Dioxyde de carbone.
- Biomasse, Hémiterpènes, Pentanes, Écosystème.
English descriptors
- KwdEn :
- Atmosphere (chemistry), Biomass (MeSH), Butadienes (metabolism), Carbon Dioxide (metabolism), Carbon Dioxide (pharmacology), Ecosystem (MeSH), Hemiterpenes (MeSH), Pentanes (MeSH), Photosynthesis (drug effects), Plant Leaves (drug effects), Plant Leaves (metabolism), Populus (drug effects), Populus (growth & development), Populus (metabolism), Trees (drug effects), Trees (growth & development), Trees (metabolism).
- MESH :
- chemical , metabolism : Butadienes, Carbon Dioxide.
- chemistry : Atmosphere.
- drug effects : Photosynthesis, Plant Leaves, Populus, Trees.
- growth & development : Populus, Trees.
- metabolism : Plant Leaves, Populus, Trees.
- chemical , pharmacology : Carbon Dioxide.
- Biomass, Ecosystem, Hemiterpenes, Pentanes.
Abstract
The emission of isoprene from the leaves of forest trees is a fundamental component of biosphere-atmosphere interactions, controlling many aspects of photochemistry in the lower atmosphere. As almost all commercial agriforest species emit high levels of isoprene, proliferation of agriforest plantations has significant potential to increase regional ozone pollution and enhance the lifetime of methane, an important determinant of global climate. Here we show that growth of an intact Populus deltoides plantation under increased CO2 (800 micromol x mol(-1) and 1,200 micromol x mol(-1)) reduced ecosystem isoprene production by 21% and 41%, while above-ground biomass accumulation was enhanced by 60% and 82%, respectively. Exposure to increased CO2 significantly reduced the cellular content of dimethylallyl diphosphate, the substrate for isoprene synthesis, in both leaves and leaf protoplasts. We identify intracellular metabolic competition for phosphoenolpyruvate as a possible control point in explaining the suppression of isoprene emission under increased CO2. Our results highlight the potential for uncoupling isoprene emission from biomass accumulation in an agriforest species, and show that negative air-quality effects of proliferating agriforests may be offset by increases in CO2.
DOI: 10.1038/nature01312
PubMed: 12529640
Affiliations:
Links toward previous steps (curation, corpus...)
Le document en format XML
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As almost all commercial agriforest species emit high levels of isoprene, proliferation of agriforest plantations has significant potential to increase regional ozone pollution and enhance the lifetime of methane, an important determinant of global climate. Here we show that growth of an intact Populus deltoides plantation under increased CO2 (800 micromol x mol(-1) and 1,200 micromol x mol(-1)) reduced ecosystem isoprene production by 21% and 41%, while above-ground biomass accumulation was enhanced by 60% and 82%, respectively. Exposure to increased CO2 significantly reduced the cellular content of dimethylallyl diphosphate, the substrate for isoprene synthesis, in both leaves and leaf protoplasts. We identify intracellular metabolic competition for phosphoenolpyruvate as a possible control point in explaining the suppression of isoprene emission under increased CO2. Our results highlight the potential for uncoupling isoprene emission from biomass accumulation in an agriforest species, and show that negative air-quality effects of proliferating agriforests may be offset by increases in CO2.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">12529640</PMID><DateCompleted><Year>2003</Year><Month>02</Month><Day>25</Day></DateCompleted><DateRevised><Year>2013</Year><Month>11</Month><Day>21</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Print">0028-0836</ISSN><JournalIssue CitedMedium="Print"><Volume>421</Volume><Issue>6920</Issue><PubDate><Year>2003</Year><Month>Jan</Month><Day>16</Day></PubDate></JournalIssue><Title>Nature</Title><ISOAbbreviation>Nature</ISOAbbreviation></Journal><ArticleTitle>Increased CO2 uncouples growth from isoprene emission in an agriforest ecosystem.</ArticleTitle><Pagination><MedlinePgn>256-9</MedlinePgn></Pagination><Abstract><AbstractText>The emission of isoprene from the leaves of forest trees is a fundamental component of biosphere-atmosphere interactions, controlling many aspects of photochemistry in the lower atmosphere. As almost all commercial agriforest species emit high levels of isoprene, proliferation of agriforest plantations has significant potential to increase regional ozone pollution and enhance the lifetime of methane, an important determinant of global climate. Here we show that growth of an intact Populus deltoides plantation under increased CO2 (800 micromol x mol(-1) and 1,200 micromol x mol(-1)) reduced ecosystem isoprene production by 21% and 41%, while above-ground biomass accumulation was enhanced by 60% and 82%, respectively. Exposure to increased CO2 significantly reduced the cellular content of dimethylallyl diphosphate, the substrate for isoprene synthesis, in both leaves and leaf protoplasts. We identify intracellular metabolic competition for phosphoenolpyruvate as a possible control point in explaining the suppression of isoprene emission under increased CO2. Our results highlight the potential for uncoupling isoprene emission from biomass accumulation in an agriforest species, and show that negative air-quality effects of proliferating agriforests may be offset by increases in CO2.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Rosenstiel</LastName><ForeName>Todd N</ForeName><Initials>TN</Initials><AffiliationInfo><Affiliation>Department of Environmental, Population, and Organismic Biology, University of Colorado, Boulder, Colorado 80309, USA. todd.rosenstiel@colorado.edu</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Potosnak</LastName><ForeName>Mark J</ForeName><Initials>MJ</Initials></Author><Author ValidYN="Y"><LastName>Griffin</LastName><ForeName>Kevin L</ForeName><Initials>KL</Initials></Author><Author ValidYN="Y"><LastName>Fall</LastName><ForeName>Ray</ForeName><Initials>R</Initials></Author><Author ValidYN="Y"><LastName>Monson</LastName><ForeName>Russell K</ForeName><Initials>RK</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType><PublicationType UI="D013486">Research Support, U.S. Gov't, Non-P.H.S.</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2003</Year><Month>01</Month><Day>05</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Nature</MedlineTA><NlmUniqueID>0410462</NlmUniqueID><ISSNLinking>0028-0836</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D002070">Butadienes</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D045782">Hemiterpenes</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance 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MajorTopicYN="N">pharmacology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D017753" MajorTopicYN="Y">Ecosystem</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D045782" MajorTopicYN="Y">Hemiterpenes</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D010420" MajorTopicYN="Y">Pentanes</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D010788" MajorTopicYN="N">Photosynthesis</DescriptorName><QualifierName UI="Q000187" MajorTopicYN="N">drug effects</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018515" MajorTopicYN="N">Plant Leaves</DescriptorName><QualifierName UI="Q000187" MajorTopicYN="N">drug effects</QualifierName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName><QualifierName UI="Q000187" MajorTopicYN="N">drug effects</QualifierName><QualifierName UI="Q000254" MajorTopicYN="Y">growth & 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PubStatus="entrez"><Year>2003</Year><Month>1</Month><Day>17</Day><Hour>4</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">12529640</ArticleId><ArticleId IdType="doi">10.1038/nature01312</ArticleId><ArticleId IdType="pii">nature01312</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>États-Unis</li></country></list><tree><noCountry><name sortKey="Fall, Ray" sort="Fall, Ray" uniqKey="Fall R" first="Ray" last="Fall">Ray Fall</name><name sortKey="Griffin, Kevin L" sort="Griffin, Kevin L" uniqKey="Griffin K" first="Kevin L" last="Griffin">Kevin L. Griffin</name><name sortKey="Monson, Russell K" sort="Monson, Russell K" uniqKey="Monson R" first="Russell K" last="Monson">Russell K. Monson</name><name sortKey="Potosnak, Mark J" sort="Potosnak, Mark J" uniqKey="Potosnak M" first="Mark J" last="Potosnak">Mark J. Potosnak</name></noCountry><country name="États-Unis"><noRegion><name sortKey="Rosenstiel, Todd N" sort="Rosenstiel, Todd N" uniqKey="Rosenstiel T" first="Todd N" last="Rosenstiel">Todd N. Rosenstiel</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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