Plant-PET to investigate phloem vulnerability to drought in Populus tremula under changing climate regimes.
Identifieur interne : 000777 ( Main/Exploration ); précédent : 000776; suivant : 000778Plant-PET to investigate phloem vulnerability to drought in Populus tremula under changing climate regimes.
Auteurs : Michiel Hubeau [Belgique] ; Jens Mincke [Belgique] ; Christian Vanhove [Belgique] ; Jan Courtyn [Belgique] ; Stefaan Vandenberghe [Belgique] ; Kathy Steppe [Belgique]Source :
- Tree physiology [ 1758-4469 ] ; 2019.
Descripteurs français
- KwdFr :
- MESH :
English descriptors
- KwdEn :
- MESH :
- chemical , metabolism : Carbon, Carbon Dioxide.
- metabolism : Phloem, Plant Leaves, Populus, Trees.
- Climate Change, Droughts, Positron-Emission Tomography.
Abstract
Phloem transport is of great importance in trees to distribute assimilated carbon across the entire tree. Nevertheless, knowledge of phloem is incomplete, because of the complexity of measuring its transport and characteristics. Only few studies have addressed how phloem transport might alter under climatic changes, with most data originating from theoretical studies. We measured phloem characteristics in leaves of young Populus tremula L. trees grown during 5 months under ambient (TA, 404 ppm ± 5) and elevated (TE, 659 ppm ± 3) atmospheric CO2 concentration ([CO2]) using a combination of positron emission tomography (PET) and compartmental modelling. Short-term phloem dynamics were measured in vivo and non-invasively using the short-lived isotope of carbon, 11C (half-life 20.4 min). Trees were scanned in well-watered and dry conditions to assess changes in phloem characteristics induced by drought. Reliability of the PET-derived results was verified with reported observations in the literature. Phloem speed was highest in well-watered TE trees and strongly reduced by 81% under drought, whereas phloem speed reduced by 61% in TA trees at the same level of drought. These findings led us to speculate that phloem transport in TE trees might be more vulnerable to drought. We discuss how a higher phloem vulnerability to drought in a changing climate could impact tree hydraulic functioning. Taken together our results suggest that trees grown for 5 months under elevated [CO2] seem to be less well-acclimated to face projected hotter droughts in a changing climate.
DOI: 10.1093/treephys/tpy131
PubMed: 30597097
Affiliations:
Links toward previous steps (curation, corpus...)
Le document en format XML
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Innovative Flemish In-vivo Imaging Technology, Department of Electronics and Information Systems, Faculty of Engineering and Architecture, Ghent University, Ghent, Belgium.</nlm:affiliation><country xml:lang="fr">Belgique</country><wicri:regionArea>Medical Imaging and Signal Processing - Innovative Flemish In-vivo Imaging Technology, Department of Electronics and Information Systems, Faculty of Engineering and Architecture, Ghent University, 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="Vanhove, Christian" sort="Vanhove, Christian" uniqKey="Vanhove C" first="Christian" last="Vanhove">Christian Vanhove</name><affiliation wicri:level="4"><nlm:affiliation>Medical Imaging and Signal Processing - Innovative Flemish In-vivo Imaging Technology, Department of Electronics and Information Systems, Faculty of Engineering and Architecture, Ghent University, Ghent, Belgium.</nlm:affiliation><country xml:lang="fr">Belgique</country><wicri:regionArea>Medical Imaging and Signal Processing - Innovative Flemish In-vivo Imaging Technology, Department of Electronics and Information Systems, Faculty of Engineering and Architecture, Ghent University, 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="Courtyn, Jan" sort="Courtyn, Jan" uniqKey="Courtyn J" first="Jan" last="Courtyn">Jan Courtyn</name><affiliation wicri:level="1"><nlm:affiliation>Medical Molecular Imaging and Therapy, Department of Radiology and Nuclear Medicine, Ghent University Hospital, Ghent, Belgium.</nlm:affiliation><country xml:lang="fr">Belgique</country><wicri:regionArea>Medical Molecular Imaging and Therapy, Department of Radiology and Nuclear Medicine, Ghent University Hospital, Ghent</wicri:regionArea><wicri:noRegion>Ghent</wicri:noRegion></affiliation></author><author><name sortKey="Vandenberghe, Stefaan" sort="Vandenberghe, Stefaan" uniqKey="Vandenberghe S" first="Stefaan" last="Vandenberghe">Stefaan Vandenberghe</name><affiliation wicri:level="4"><nlm:affiliation>Medical Imaging and Signal Processing - Innovative Flemish In-vivo Imaging Technology, Department of Electronics and Information Systems, Faculty of Engineering and Architecture, Ghent University, Ghent, Belgium.</nlm:affiliation><country xml:lang="fr">Belgique</country><wicri:regionArea>Medical Imaging and Signal Processing - Innovative Flemish In-vivo Imaging Technology, Department of Electronics and Information Systems, Faculty of Engineering and Architecture, Ghent University, 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="Steppe, Kathy" sort="Steppe, Kathy" uniqKey="Steppe K" first="Kathy" last="Steppe">Kathy Steppe</name><affiliation wicri:level="4"><nlm:affiliation>Laboratory of Plant Ecology, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium.</nlm:affiliation><country xml:lang="fr">Belgique</country><wicri:regionArea>Laboratory of Plant Ecology, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, 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">Tree physiology</title><idno type="eISSN">1758-4469</idno><imprint><date when="2019" type="published">2019</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Carbon (metabolism)</term><term>Carbon Dioxide (metabolism)</term><term>Climate Change (MeSH)</term><term>Droughts (MeSH)</term><term>Phloem (metabolism)</term><term>Plant Leaves (metabolism)</term><term>Populus (metabolism)</term><term>Positron-Emission Tomography (MeSH)</term><term>Trees (metabolism)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Arbres (métabolisme)</term><term>Carbone (métabolisme)</term><term>Changement climatique (MeSH)</term><term>Dioxyde de carbone (métabolisme)</term><term>Feuilles de plante (métabolisme)</term><term>Phloème (métabolisme)</term><term>Populus (métabolisme)</term><term>Sécheresses (MeSH)</term><term>Tomographie par émission de positons (MeSH)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Carbon</term><term>Carbon Dioxide</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Phloem</term><term>Plant Leaves</term><term>Populus</term><term>Trees</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Arbres</term><term>Carbone</term><term>Dioxyde de carbone</term><term>Feuilles de plante</term><term>Phloème</term><term>Populus</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Climate Change</term><term>Droughts</term><term>Positron-Emission Tomography</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Changement climatique</term><term>Sécheresses</term><term>Tomographie par émission de positons</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Phloem transport is of great importance in trees to distribute assimilated carbon across the entire tree. Nevertheless, knowledge of phloem is incomplete, because of the complexity of measuring its transport and characteristics. Only few studies have addressed how phloem transport might alter under climatic changes, with most data originating from theoretical studies. We measured phloem characteristics in leaves of young Populus tremula L. trees grown during 5 months under ambient (TA, 404 ppm ± 5) and elevated (TE, 659 ppm ± 3) atmospheric CO2 concentration ([CO2]) using a combination of positron emission tomography (PET) and compartmental modelling. Short-term phloem dynamics were measured in vivo and non-invasively using the short-lived isotope of carbon, 11C (half-life 20.4 min). Trees were scanned in well-watered and dry conditions to assess changes in phloem characteristics induced by drought. Reliability of the PET-derived results was verified with reported observations in the literature. Phloem speed was highest in well-watered TE trees and strongly reduced by 81% under drought, whereas phloem speed reduced by 61% in TA trees at the same level of drought. These findings led us to speculate that phloem transport in TE trees might be more vulnerable to drought. We discuss how a higher phloem vulnerability to drought in a changing climate could impact tree hydraulic functioning. Taken together our results suggest that trees grown for 5 months under elevated [CO2] seem to be less well-acclimated to face projected hotter droughts in a changing climate.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">30597097</PMID><DateCompleted><Year>2019</Year><Month>04</Month><Day>11</Day></DateCompleted><DateRevised><Year>2019</Year><Month>04</Month><Day>11</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Electronic">1758-4469</ISSN><JournalIssue CitedMedium="Internet"><Volume>39</Volume><Issue>2</Issue><PubDate><Year>2019</Year><Month>02</Month><Day>01</Day></PubDate></JournalIssue><Title>Tree physiology</Title><ISOAbbreviation>Tree Physiol</ISOAbbreviation></Journal><ArticleTitle>Plant-PET to investigate phloem vulnerability to drought in Populus tremula under changing climate regimes.</ArticleTitle><Pagination><MedlinePgn>211-221</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1093/treephys/tpy131</ELocationID><Abstract><AbstractText>Phloem transport is of great importance in trees to distribute assimilated carbon across the entire tree. Nevertheless, knowledge of phloem is incomplete, because of the complexity of measuring its transport and characteristics. Only few studies have addressed how phloem transport might alter under climatic changes, with most data originating from theoretical studies. We measured phloem characteristics in leaves of young Populus tremula L. trees grown during 5 months under ambient (TA, 404 ppm ± 5) and elevated (TE, 659 ppm ± 3) atmospheric CO2 concentration ([CO2]) using a combination of positron emission tomography (PET) and compartmental modelling. Short-term phloem dynamics were measured in vivo and non-invasively using the short-lived isotope of carbon, 11C (half-life 20.4 min). Trees were scanned in well-watered and dry conditions to assess changes in phloem characteristics induced by drought. Reliability of the PET-derived results was verified with reported observations in the literature. Phloem speed was highest in well-watered TE trees and strongly reduced by 81% under drought, whereas phloem speed reduced by 61% in TA trees at the same level of drought. These findings led us to speculate that phloem transport in TE trees might be more vulnerable to drought. We discuss how a higher phloem vulnerability to drought in a changing climate could impact tree hydraulic functioning. Taken together our results suggest that trees grown for 5 months under elevated [CO2] seem to be less well-acclimated to face projected hotter droughts in a changing climate.</AbstractText><CopyrightInformation>© The Author(s) 2018. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Hubeau</LastName><ForeName>Michiel</ForeName><Initials>M</Initials><AffiliationInfo><Affiliation>Laboratory of Plant Ecology, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Mincke</LastName><ForeName>Jens</ForeName><Initials>J</Initials><AffiliationInfo><Affiliation>Laboratory of Plant Ecology, Department of Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Medical Imaging and Signal Processing - Innovative Flemish In-vivo Imaging Technology, Department of Electronics and Information Systems, Faculty of Engineering and Architecture, Ghent University, Ghent, Belgium.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Vanhove</LastName><ForeName>Christian</ForeName><Initials>C</Initials><AffiliationInfo><Affiliation>Medical Imaging and Signal Processing - Innovative Flemish In-vivo Imaging Technology, Department of Electronics and Information Systems, Faculty of Engineering and Architecture, Ghent University, Ghent, Belgium.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Courtyn</LastName><ForeName>Jan</ForeName><Initials>J</Initials><AffiliationInfo><Affiliation>Medical Molecular Imaging and Therapy, Department of Radiology and Nuclear Medicine, Ghent University Hospital, Ghent, Belgium.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Vandenberghe</LastName><ForeName>Stefaan</ForeName><Initials>S</Initials><AffiliationInfo><Affiliation>Medical Imaging and Signal Processing - Innovative Flemish In-vivo Imaging Technology, Department of Electronics and Information Systems, Faculty of Engineering and Architecture, Ghent University, 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 Plants and Crops, Faculty of Bioscience Engineering, Ghent University, Ghent, 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></PublicationTypeList></Article><MedlineJournalInfo><Country>Canada</Country><MedlineTA>Tree Physiol</MedlineTA><NlmUniqueID>100955338</NlmUniqueID><ISSNLinking>0829-318X</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>142M471B3J</RegistryNumber><NameOfSubstance UI="D002245">Carbon Dioxide</NameOfSubstance></Chemical><Chemical><RegistryNumber>7440-44-0</RegistryNumber><NameOfSubstance UI="D002244">Carbon</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D002244" MajorTopicYN="N">Carbon</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D002245" MajorTopicYN="N">Carbon Dioxide</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D057231" MajorTopicYN="Y">Climate Change</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D055864" MajorTopicYN="Y">Droughts</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D052585" MajorTopicYN="N">Phloem</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018515" MajorTopicYN="N">Plant Leaves</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D049268" MajorTopicYN="N">Positron-Emission Tomography</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014197" MajorTopicYN="N">Trees</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading></MeshHeadingList><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="Y">Populus tremula L.</Keyword><Keyword MajorTopicYN="Y">carbon-11 (11C)</Keyword><Keyword MajorTopicYN="Y">climate change effects</Keyword><Keyword MajorTopicYN="Y">compartmental modelling</Keyword><Keyword MajorTopicYN="Y">phloem drought vulnerability</Keyword><Keyword MajorTopicYN="Y">phloem dynamics</Keyword><Keyword MajorTopicYN="Y">positron emission tomography (PET)</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2018</Year><Month>04</Month><Day>11</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2018</Year><Month>10</Month><Day>24</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2018</Year><Month>11</Month><Day>06</Day></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2019</Year><Month>1</Month><Day>1</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2019</Year><Month>4</Month><Day>12</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2019</Year><Month>1</Month><Day>1</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">30597097</ArticleId><ArticleId IdType="pii">5268837</ArticleId><ArticleId IdType="doi">10.1093/treephys/tpy131</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="Hubeau, Michiel" sort="Hubeau, Michiel" uniqKey="Hubeau M" first="Michiel" last="Hubeau">Michiel Hubeau</name></region><name sortKey="Courtyn, Jan" sort="Courtyn, Jan" uniqKey="Courtyn J" first="Jan" last="Courtyn">Jan Courtyn</name><name sortKey="Mincke, Jens" sort="Mincke, Jens" uniqKey="Mincke J" first="Jens" last="Mincke">Jens Mincke</name><name sortKey="Mincke, Jens" sort="Mincke, Jens" uniqKey="Mincke J" first="Jens" last="Mincke">Jens Mincke</name><name sortKey="Steppe, Kathy" sort="Steppe, Kathy" uniqKey="Steppe K" first="Kathy" last="Steppe">Kathy Steppe</name><name sortKey="Vandenberghe, Stefaan" sort="Vandenberghe, Stefaan" uniqKey="Vandenberghe S" first="Stefaan" last="Vandenberghe">Stefaan Vandenberghe</name><name sortKey="Vanhove, Christian" sort="Vanhove, Christian" uniqKey="Vanhove C" first="Christian" last="Vanhove">Christian Vanhove</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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