Internal recycling of respired CO 2 may be important for plant functioning under changing climate regimes.
Identifieur interne : 002622 ( Main/Exploration ); précédent : 002621; suivant : 002623Internal recycling of respired CO 2 may be important for plant functioning under changing climate regimes.
Auteurs : Jasper Bloemen [Belgique] ; Mary Anne Mcguire [États-Unis] ; Doug P. Aubrey [États-Unis] ; Robert O. Teskey [États-Unis] ; Kathy Steppe [Belgique]Source :
- Plant signaling & behavior [ 1559-2324 ] ; 2013.
Descripteurs français
- KwdFr :
- MESH :
- métabolisme : Dioxyde de carbone.
- physiologie : Populus, Racines de plante, Stomates de plante.
- Changement climatique, Respiration cellulaire.
English descriptors
- KwdEn :
- MESH :
- chemical , metabolism : Carbon Dioxide.
- physiology : Plant Roots, Plant Stomata, Populus.
- Cell Respiration, Climate Change.
Abstract
Recent studies have provided evidence of a large flux of root-respired CO 2 in the transpiration stream of trees. In our study, we investigated the potential impact of this internal CO 2 transport on aboveground carbon assimilation and CO 2 efflux. To trace the transport of root-respired CO 2, we infused a (13)C label at the stem base of field-grown Populus deltoides Bartr. ex. Marsh trees. The (13)C label was transported to the top of the stem and throughout the crown via the transpiration stream. Up to 17% of the (13)C label was assimilated by chlorophyll-containing tissues. Our results provide evidence of a mechanism for recycling respired CO 2 within trees. Such a mechanism may have important implications for how plants cope with predicted increases in intensity and frequency of droughts. Here, we speculate on the potential significance of this recycling mechanism within the context of plant responses to climate change and plants currently inhabiting arid environments.
DOI: 10.4161/psb.27530
PubMed: 24398440
PubMed Central: PMC4092314
Affiliations:
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In our study, we investigated the potential impact of this internal CO 2 transport on aboveground carbon assimilation and CO 2 efflux. To trace the transport of root-respired CO 2, we infused a (13)C label at the stem base of field-grown Populus deltoides Bartr. ex. Marsh trees. The (13)C label was transported to the top of the stem and throughout the crown via the transpiration stream. Up to 17% of the (13)C label was assimilated by chlorophyll-containing tissues. Our results provide evidence of a mechanism for recycling respired CO 2 within trees. Such a mechanism may have important implications for how plants cope with predicted increases in intensity and frequency of droughts. Here, we speculate on the potential significance of this recycling mechanism within the context of plant responses to climate change and plants currently inhabiting arid environments.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">24398440</PMID><DateCompleted><Year>2014</Year><Month>12</Month><Day>09</Day></DateCompleted><DateRevised><Year>2019</Year><Month>01</Month><Day>08</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1559-2324</ISSN><JournalIssue CitedMedium="Internet"><Volume>8</Volume><Issue>12</Issue><PubDate><Year>2013</Year></PubDate></JournalIssue><Title>Plant signaling & behavior</Title><ISOAbbreviation>Plant Signal Behav</ISOAbbreviation></Journal><ArticleTitle>Internal recycling of respired CO 2 may be important for plant functioning under changing climate regimes.</ArticleTitle><Pagination><MedlinePgn>e27530</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.4161/psb.27530</ELocationID><ELocationID EIdType="pii" ValidYN="Y">e27530</ELocationID><Abstract><AbstractText>Recent studies have provided evidence of a large flux of root-respired CO 2 in the transpiration stream of trees. 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Here, we speculate on the potential significance of this recycling mechanism within the context of plant responses to climate change and plants currently inhabiting arid environments.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Bloemen</LastName><ForeName>Jasper</ForeName><Initials>J</Initials><AffiliationInfo><Affiliation>Laboratory of Plant Ecology; Faculty of Bioscience Engineering; Ghent University; Gent, Belgium.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>McGuire</LastName><ForeName>Mary Anne</ForeName><Initials>MA</Initials><AffiliationInfo><Affiliation>Warnell School of Forestry and Natural Resources; University of Georgia; Athens, GA USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Aubrey</LastName><ForeName>Doug P</ForeName><Initials>DP</Initials><AffiliationInfo><Affiliation>Department of Biology; Georgia Southern University; Statesboro, GA USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Teskey</LastName><ForeName>Robert O</ForeName><Initials>RO</Initials><AffiliationInfo><Affiliation>Warnell School of Forestry and Natural Resources; University of Georgia; Athens, GA USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Steppe</LastName><ForeName>Kathy</ForeName><Initials>K</Initials><AffiliationInfo><Affiliation>Laboratory of Plant Ecology; Faculty of Bioscience Engineering; Ghent University; Gent, Belgium.</Affiliation></AffiliationInfo></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 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first="Mary Anne" last="Mcguire">Mary Anne Mcguire</name></region><name sortKey="Aubrey, Doug P" sort="Aubrey, Doug P" uniqKey="Aubrey D" first="Doug P" last="Aubrey">Doug P. 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