Woody tissue photosynthesis increases radial stem growth of young poplar trees under ambient atmospheric CO2 but its contribution ceases under elevated CO2.
Identifieur interne : 000018 ( Main/Exploration ); précédent : 000017; suivant : 000019Woody tissue photosynthesis increases radial stem growth of young poplar trees under ambient atmospheric CO2 but its contribution ceases under elevated CO2.
Auteurs : Linus De Roo [Belgique] ; Fran Lauriks [Belgique] ; Roberto Luis Salom N [Belgique] ; Jacek Oleksyn [Pologne] ; Kathy Steppe [Belgique]Source :
- Tree physiology [ 1758-4469 ] ; 2020.
Abstract
Woody tissue photosynthesis (Pwt) contributes to the tree carbon (C) budget and generally stimulates radial stem growth under ambient atmospheric CO2 concentration (aCO2). Moreover, Pwt has potential to enhance tree survival under changing climates by delaying negative effects of drought stress on tree hydraulic functioning. However, the relevance of Pwt on tree performance under elevated atmospheric CO2 concentration (eCO2) remains unexplored. To fill this knowledge gap, 1-year-old Populus tremula L. seedlings were grown in two treatment chambers at aCO2 and eCO2 (400 and 660 ppm, respectively), and woody tissues of half of the seedlings in each treatment chamber were light-excluded to prevent Pwt. Radial stem growth, sap flow, leaf photosynthesis and stomatal and canopy conductance were measured throughout the growing season, and the concentration of non-structural carbohydrates (NSC) in stem tissues was determined at the end of the experiment. Fuelled by eCO2, an increase in stem growth of 18 and 50% was observed in control and light-excluded trees, respectively. Woody tissue photosynthesis increased radial stem growth by 39% under aCO2, while, surprisingly, no impact of Pwt on stem growth was observed under eCO2. By the end of the growing season, eCO2 and Pwt had little effect on stem growth, leaf photosynthesis acclimated to eCO2, but stomatal conductance did not, and homeostatic stem NSC pools were observed among combined treatments. Our results highlight that eCO2 potentially fulfils plant C requirements, limiting the contribution of Pwt to stem growth as atmospheric [CO2] rises, and that radial stem growth in young developing trees was C (source) limited during early phenological stages but transitioned towards sink-driven control at the end of the growing season.
DOI: 10.1093/treephys/tpaa085
PubMed: 32597984
Affiliations:
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University, Coupure links 653, 9000 Ghent, Belgium.</nlm:affiliation><country xml:lang="fr">Belgique</country><wicri:regionArea>Laboratory of Plant Ecology, Department of Plant and Crops Faculty of Bioscience Engineering, Ghent University, Coupure links 653, 9000 Ghent</wicri:regionArea><placeName><region type="province" nuts="2">Province de Flandre-Orientale</region><settlement type="city">Gand</settlement></placeName><orgName type="university">Université de Gand</orgName></affiliation></author><author><name sortKey="Lauriks, Fran" sort="Lauriks, Fran" uniqKey="Lauriks F" first="Fran" last="Lauriks">Fran Lauriks</name><affiliation wicri:level="4"><nlm:affiliation>Laboratory of Plant Ecology, Department of Plant and Crops Faculty of Bioscience Engineering, Ghent University, Coupure links 653, 9000 Ghent, Belgium.</nlm:affiliation><country xml:lang="fr">Belgique</country><wicri:regionArea>Laboratory of Plant Ecology, Department of Plant and Crops Faculty of Bioscience Engineering, Ghent University, Coupure links 653, 9000 Ghent</wicri:regionArea><placeName><region type="province" nuts="2">Province de Flandre-Orientale</region><settlement type="city">Gand</settlement></placeName><orgName type="university">Université de Gand</orgName></affiliation></author><author><name sortKey="Salom N, Roberto Luis" sort="Salom N, Roberto Luis" uniqKey="Salom N R" first="Roberto Luis" last="Salom N">Roberto Luis Salom N</name><affiliation wicri:level="4"><nlm:affiliation>Laboratory of Plant Ecology, Department of Plant and Crops Faculty of Bioscience Engineering, Ghent University, Coupure links 653, 9000 Ghent, Belgium.</nlm:affiliation><country xml:lang="fr">Belgique</country><wicri:regionArea>Laboratory of Plant Ecology, Department of Plant and Crops Faculty of Bioscience Engineering, Ghent University, Coupure links 653, 9000 Ghent</wicri:regionArea><placeName><region type="province" nuts="2">Province de Flandre-Orientale</region><settlement 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xml:lang="fr">Belgique</country><wicri:regionArea>Laboratory of Plant Ecology, Department of Plant and Crops Faculty of Bioscience Engineering, Ghent University, Coupure links 653, 9000 Ghent</wicri:regionArea><placeName><region type="province" nuts="2">Province de Flandre-Orientale</region><settlement type="city">Gand</settlement></placeName><orgName type="university">Université de Gand</orgName></affiliation></author></analytic><series><title level="j">Tree physiology</title><idno type="eISSN">1758-4469</idno><imprint><date when="2020" type="published">2020</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Woody tissue photosynthesis (Pwt) contributes to the tree carbon (C) budget and generally stimulates radial stem growth under ambient atmospheric CO2 concentration (aCO2). Moreover, Pwt has potential to enhance tree survival under changing climates by delaying negative effects of drought stress on tree hydraulic functioning. However, the relevance of Pwt on tree performance under elevated atmospheric CO2 concentration (eCO2) remains unexplored. To fill this knowledge gap, 1-year-old Populus tremula L. seedlings were grown in two treatment chambers at aCO2 and eCO2 (400 and 660 ppm, respectively), and woody tissues of half of the seedlings in each treatment chamber were light-excluded to prevent Pwt. Radial stem growth, sap flow, leaf photosynthesis and stomatal and canopy conductance were measured throughout the growing season, and the concentration of non-structural carbohydrates (NSC) in stem tissues was determined at the end of the experiment. Fuelled by eCO2, an increase in stem growth of 18 and 50% was observed in control and light-excluded trees, respectively. Woody tissue photosynthesis increased radial stem growth by 39% under aCO2, while, surprisingly, no impact of Pwt on stem growth was observed under eCO2. By the end of the growing season, eCO2 and Pwt had little effect on stem growth, leaf photosynthesis acclimated to eCO2, but stomatal conductance did not, and homeostatic stem NSC pools were observed among combined treatments. Our results highlight that eCO2 potentially fulfils plant C requirements, limiting the contribution of Pwt to stem growth as atmospheric [CO2] rises, and that radial stem growth in young developing trees was C (source) limited during early phenological stages but transitioned towards sink-driven control at the end of the growing season.</div></front></TEI><pubmed><MedlineCitation Status="In-Data-Review" Owner="NLM"><PMID Version="1">32597984</PMID><DateRevised><Year>2020</Year><Month>11</Month><Day>10</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Electronic">1758-4469</ISSN><JournalIssue CitedMedium="Internet"><Volume>40</Volume><Issue>11</Issue><PubDate><Year>2020</Year><Month>Oct</Month><Day>29</Day></PubDate></JournalIssue><Title>Tree physiology</Title><ISOAbbreviation>Tree Physiol</ISOAbbreviation></Journal><ArticleTitle>Woody tissue photosynthesis increases radial stem growth of young poplar trees under ambient atmospheric CO2 but its contribution ceases under elevated CO2.</ArticleTitle><Pagination><MedlinePgn>1572-1582</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1093/treephys/tpaa085</ELocationID><Abstract><AbstractText>Woody tissue photosynthesis (Pwt) contributes to the tree carbon (C) budget and generally stimulates radial stem growth under ambient atmospheric CO2 concentration (aCO2). Moreover, Pwt has potential to enhance tree survival under changing climates by delaying negative effects of drought stress on tree hydraulic functioning. However, the relevance of Pwt on tree performance under elevated atmospheric CO2 concentration (eCO2) remains unexplored. To fill this knowledge gap, 1-year-old Populus tremula L. seedlings were grown in two treatment chambers at aCO2 and eCO2 (400 and 660 ppm, respectively), and woody tissues of half of the seedlings in each treatment chamber were light-excluded to prevent Pwt. Radial stem growth, sap flow, leaf photosynthesis and stomatal and canopy conductance were measured throughout the growing season, and the concentration of non-structural carbohydrates (NSC) in stem tissues was determined at the end of the experiment. Fuelled by eCO2, an increase in stem growth of 18 and 50% was observed in control and light-excluded trees, respectively. Woody tissue photosynthesis increased radial stem growth by 39% under aCO2, while, surprisingly, no impact of Pwt on stem growth was observed under eCO2. By the end of the growing season, eCO2 and Pwt had little effect on stem growth, leaf photosynthesis acclimated to eCO2, but stomatal conductance did not, and homeostatic stem NSC pools were observed among combined treatments. Our results highlight that eCO2 potentially fulfils plant C requirements, limiting the contribution of Pwt to stem growth as atmospheric [CO2] rises, and that radial stem growth in young developing trees was C (source) limited during early phenological stages but transitioned towards sink-driven control at the end of the growing season.</AbstractText><CopyrightInformation>© The Author(s) 2020. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>De Roo</LastName><ForeName>Linus</ForeName><Initials>L</Initials><AffiliationInfo><Affiliation>Laboratory of Plant Ecology, Department of Plant and Crops Faculty of Bioscience Engineering, Ghent University, Coupure links 653, 9000 Ghent, Belgium.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Lauriks</LastName><ForeName>Fran</ForeName><Initials>F</Initials><AffiliationInfo><Affiliation>Laboratory of Plant Ecology, Department of Plant and Crops Faculty of Bioscience Engineering, Ghent University, Coupure links 653, 9000 Ghent, Belgium.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Salomón</LastName><ForeName>Roberto Luis</ForeName><Initials>RL</Initials><AffiliationInfo><Affiliation>Laboratory of Plant Ecology, Department of Plant and Crops Faculty of Bioscience Engineering, Ghent University, Coupure links 653, 9000 Ghent, Belgium.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Oleksyn</LastName><ForeName>Jacek</ForeName><Initials>J</Initials><AffiliationInfo><Affiliation>Polish Academy of Sciences, Institute of Dendrology, Parkowa 5, 62-035 Kórnik, Poland.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Steppe</LastName><ForeName>Kathy</ForeName><Initials>K</Initials><AffiliationInfo><Affiliation>Laboratory of Plant Ecology, Department of Plant and Crops Faculty of Bioscience Engineering, Ghent University, Coupure links 653, 9000 Ghent, Belgium.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>Canada</Country><MedlineTA>Tree Physiol</MedlineTA><NlmUniqueID>100955338</NlmUniqueID><ISSNLinking>0829-318X</ISSNLinking></MedlineJournalInfo><CitationSubset>IM</CitationSubset><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Populus tremula L</Keyword><Keyword MajorTopicYN="N">Aspen tree</Keyword><Keyword MajorTopicYN="N">CO2 enrichment</Keyword><Keyword MajorTopicYN="N">bark photosynthesis</Keyword><Keyword MajorTopicYN="N">biomass increment</Keyword><Keyword MajorTopicYN="N">carbon budget</Keyword><Keyword MajorTopicYN="N">non-structural carbohydrates</Keyword><Keyword MajorTopicYN="N">stem recycling photosynthesis</Keyword><Keyword MajorTopicYN="N">tree hydraulics</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2020</Year><Month>03</Month><Day>26</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2020</Year><Month>06</Month><Day>19</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2020</Year><Month>06</Month><Day>22</Day></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2020</Year><Month>7</Month><Day>1</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2020</Year><Month>7</Month><Day>1</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2020</Year><Month>6</Month><Day>30</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">32597984</ArticleId><ArticleId IdType="pii">5864703</ArticleId><ArticleId IdType="doi">10.1093/treephys/tpaa085</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Belgique</li><li>Pologne</li></country><region><li>Province de Flandre-Orientale</li></region><settlement><li>Gand</li></settlement><orgName><li>Université de Gand</li></orgName></list><tree><country name="Belgique"><region name="Province de Flandre-Orientale"><name sortKey="De Roo, Linus" sort="De Roo, Linus" uniqKey="De Roo L" first="Linus" last="De Roo">Linus De Roo</name></region><name sortKey="Lauriks, Fran" sort="Lauriks, Fran" uniqKey="Lauriks F" first="Fran" last="Lauriks">Fran Lauriks</name><name sortKey="Salom N, Roberto Luis" sort="Salom N, Roberto Luis" uniqKey="Salom N R" first="Roberto Luis" last="Salom N">Roberto Luis Salom N</name><name sortKey="Steppe, Kathy" sort="Steppe, Kathy" uniqKey="Steppe K" first="Kathy" last="Steppe">Kathy Steppe</name></country><country name="Pologne"><noRegion><name sortKey="Oleksyn, Jacek" sort="Oleksyn, Jacek" uniqKey="Oleksyn J" first="Jacek" last="Oleksyn">Jacek Oleksyn</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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