Sugars from woody tissue photosynthesis reduce xylem vulnerability to cavitation.
Identifieur interne : 001181 ( Main/Exploration ); précédent : 001180; suivant : 001182Sugars from woody tissue photosynthesis reduce xylem vulnerability to cavitation.
Auteurs : Niels J F. De Baerdemaeker [Belgique] ; Roberto Luis Salom N [Belgique] ; Linus De Roo [Belgique] ; Kathy Steppe [Belgique]Source :
- The New phytologist [ 1469-8137 ] ; 2017.
Descripteurs français
- KwdFr :
- MESH :
- métabolisme : Protéines végétales, Sucres.
- physiologie : Photosynthèse, Populus, Xylème.
- ultrastructure : Xylème.
English descriptors
- KwdEn :
- MESH :
- chemical , metabolism : Plant Proteins, Sugars.
- physiology : Photosynthesis, Populus, Xylem.
- ultrastructure : Xylem.
Abstract
Reassimilation of internal CO2 via woody tissue photosynthesis has a substantial effect on tree carbon income and wood production. However, little is known about its role in xylem vulnerability to cavitation and its implications in drought-driven tree mortality. Young trees of Populus nigra were subjected to light exclusion at the branch and stem levels. After 40 d, measurements of xylem water potential, diameter variation and acoustic emission (AE) were performed in detached branches to obtain acoustic vulnerability curves to cavitation following bench-top dehydration. Acoustic vulnerability curves and derived AE50 values (i.e. water potential at which 50% of cavitation-related acoustic emissions occur) differed significantly between light-excluded and control branches (AE50,light-excluded = -1.00 ± 0.13 MPa; AE50,control = -1.45 ± 0.09 MPa; P = 0.007) denoting higher vulnerability to cavitation in light-excluded trees. Woody tissue photosynthesis represents an alternative and immediate source of nonstructural carbohydrates (NSC) that confers lower xylem vulnerability to cavitation via sugar-mediated mechanisms. Embolism repair and xylem structural changes could not explain this observation as the amount of cumulative AE and basic wood density did not differ between treatments. We suggest that woody tissue assimilates might play a role in the synthesis of xylem surfactants for nanobubble stabilization under tension.
DOI: 10.1111/nph.14787
PubMed: 28921550
Affiliations:
Links toward previous steps (curation, corpus...)
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De Baerdemaeker</name><affiliation wicri:level="4"><nlm:affiliation>Laboratory of Plant Ecology, Department of Applied Ecology and Environmental Biology, 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 Applied Ecology and Environmental Biology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, 9000, Ghent</wicri:regionArea><orgName type="university">Université de Gand</orgName><placeName><settlement type="city">Gand</settlement><region>Région flamande</region><region type="district" nuts="2">Province de Flandre-Orientale</region></placeName></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 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Ecology and Environmental Biology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, 9000, Ghent</wicri:regionArea><orgName type="university">Université de Gand</orgName><placeName><settlement type="city">Gand</settlement><region>Région flamande</region><region type="district" nuts="2">Province de Flandre-Orientale</region></placeName></affiliation></author></analytic><series><title level="j">The New phytologist</title><idno type="eISSN">1469-8137</idno><imprint><date when="2017" type="published">2017</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Photosynthesis (physiology)</term><term>Plant Proteins (metabolism)</term><term>Populus (physiology)</term><term>Sugars (metabolism)</term><term>Xylem (physiology)</term><term>Xylem (ultrastructure)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Photosynthèse (physiologie)</term><term>Populus (physiologie)</term><term>Protéines végétales (métabolisme)</term><term>Sucres (métabolisme)</term><term>Xylème (physiologie)</term><term>Xylème (ultrastructure)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Plant Proteins</term><term>Sugars</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Protéines végétales</term><term>Sucres</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Photosynthèse</term><term>Populus</term><term>Xylème</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Photosynthesis</term><term>Populus</term><term>Xylem</term></keywords><keywords scheme="MESH" qualifier="ultrastructure" xml:lang="en"><term>Xylem</term></keywords><keywords scheme="MESH" qualifier="ultrastructure" xml:lang="fr"><term>Xylème</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Reassimilation of internal CO<sub>2</sub> via woody tissue photosynthesis has a substantial effect on tree carbon income and wood production. However, little is known about its role in xylem vulnerability to cavitation and its implications in drought-driven tree mortality. Young trees of Populus nigra were subjected to light exclusion at the branch and stem levels. After 40 d, measurements of xylem water potential, diameter variation and acoustic emission (AE) were performed in detached branches to obtain acoustic vulnerability curves to cavitation following bench-top dehydration. Acoustic vulnerability curves and derived AE<sub>50</sub> values (i.e. water potential at which 50% of cavitation-related acoustic emissions occur) differed significantly between light-excluded and control branches (AE<sub>50,light-excluded</sub> = -1.00 ± 0.13 MPa; AE<sub>50,control</sub> = -1.45 ± 0.09 MPa; P = 0.007) denoting higher vulnerability to cavitation in light-excluded trees. Woody tissue photosynthesis represents an alternative and immediate source of nonstructural carbohydrates (NSC) that confers lower xylem vulnerability to cavitation via sugar-mediated mechanisms. Embolism repair and xylem structural changes could not explain this observation as the amount of cumulative AE and basic wood density did not differ between treatments. We suggest that woody tissue assimilates might play a role in the synthesis of xylem surfactants for nanobubble stabilization under tension.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">28921550</PMID><DateCompleted><Year>2018</Year><Month>06</Month><Day>01</Day></DateCompleted><DateRevised><Year>2020</Year><Month>09</Month><Day>30</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1469-8137</ISSN><JournalIssue CitedMedium="Internet"><Volume>216</Volume><Issue>3</Issue><PubDate><Year>2017</Year><Month>Nov</Month></PubDate></JournalIssue><Title>The New phytologist</Title><ISOAbbreviation>New Phytol</ISOAbbreviation></Journal><ArticleTitle>Sugars from woody tissue photosynthesis reduce xylem vulnerability to cavitation.</ArticleTitle><Pagination><MedlinePgn>720-727</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1111/nph.14787</ELocationID><Abstract><AbstractText>Reassimilation of internal CO<sub>2</sub> via woody tissue photosynthesis has a substantial effect on tree carbon income and wood production. However, little is known about its role in xylem vulnerability to cavitation and its implications in drought-driven tree mortality. Young trees of Populus nigra were subjected to light exclusion at the branch and stem levels. After 40 d, measurements of xylem water potential, diameter variation and acoustic emission (AE) were performed in detached branches to obtain acoustic vulnerability curves to cavitation following bench-top dehydration. Acoustic vulnerability curves and derived AE<sub>50</sub> values (i.e. water potential at which 50% of cavitation-related acoustic emissions occur) differed significantly between light-excluded and control branches (AE<sub>50,light-excluded</sub> = -1.00 ± 0.13 MPa; AE<sub>50,control</sub> = -1.45 ± 0.09 MPa; P = 0.007) denoting higher vulnerability to cavitation in light-excluded trees. Woody tissue photosynthesis represents an alternative and immediate source of nonstructural carbohydrates (NSC) that confers lower xylem vulnerability to cavitation via sugar-mediated mechanisms. Embolism repair and xylem structural changes could not explain this observation as the amount of cumulative AE and basic wood density did not differ between treatments. We suggest that woody tissue assimilates might play a role in the synthesis of xylem surfactants for nanobubble stabilization under tension.</AbstractText><CopyrightInformation>© 2017 The Authors. New Phytologist © 2017 New Phytologist Trust.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>De Baerdemaeker</LastName><ForeName>Niels J F</ForeName><Initials>NJF</Initials><AffiliationInfo><Affiliation>Laboratory of Plant Ecology, Department of Applied Ecology and Environmental Biology, 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 Applied Ecology and Environmental Biology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, 9000, Ghent, Belgium.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>De Roo</LastName><ForeName>Linus</ForeName><Initials>L</Initials><AffiliationInfo><Affiliation>Laboratory of Plant Ecology, Department of Applied Ecology and Environmental Biology, Faculty of Bioscience Engineering, Ghent University, Coupure links 653, 9000, Ghent, Belgium.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Steppe</LastName><ForeName>Kathy</ForeName><Initials>K</Initials><AffiliationInfo><Affiliation>Laboratory of Plant Ecology, Department of Applied Ecology and Environmental Biology, 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><ArticleDate DateType="Electronic"><Year>2017</Year><Month>09</Month><Day>18</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>New Phytol</MedlineTA><NlmUniqueID>9882884</NlmUniqueID><ISSNLinking>0028-646X</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D010940">Plant Proteins</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D000073893">Sugars</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D010788" MajorTopicYN="N">Photosynthesis</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D010940" MajorTopicYN="N">Plant Proteins</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D000073893" MajorTopicYN="N">Sugars</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D052584" MajorTopicYN="N">Xylem</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName><QualifierName UI="Q000648" MajorTopicYN="N">ultrastructure</QualifierName></MeshHeading></MeshHeadingList><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Populus nigra
</Keyword><Keyword MajorTopicYN="N">acoustic emissions</Keyword><Keyword MajorTopicYN="N">drought stress</Keyword><Keyword MajorTopicYN="N">embolism repair</Keyword><Keyword MajorTopicYN="N">internal CO2 transport</Keyword><Keyword MajorTopicYN="N">surfactants</Keyword><Keyword MajorTopicYN="N">vulnerability curve</Keyword><Keyword MajorTopicYN="N">woody tissue (stem) photosynthesis</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2017</Year><Month>05</Month><Day>12</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2017</Year><Month>08</Month><Day>13</Day></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2017</Year><Month>9</Month><Day>19</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2018</Year><Month>6</Month><Day>2</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2017</Year><Month>9</Month><Day>19</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">28921550</ArticleId><ArticleId IdType="doi">10.1111/nph.14787</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Belgique</li></country><region><li>Province de Flandre-Orientale</li><li>Région flamande</li></region><settlement><li>Gand</li></settlement><orgName><li>Université de Gand</li></orgName></list><tree><country name="Belgique"><region name="Région flamande"><name sortKey="De Baerdemaeker, Niels J F" sort="De Baerdemaeker, Niels J F" uniqKey="De Baerdemaeker N" first="Niels J F" last="De Baerdemaeker">Niels J F. De Baerdemaeker</name></region><name sortKey="De Roo, Linus" sort="De Roo, Linus" uniqKey="De Roo L" first="Linus" last="De Roo">Linus De Roo</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></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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