Increasing air humidity influences hydraulic efficiency but not functional vulnerability of xylem in hybrid aspen.
Identifieur interne : 001334 ( Main/Exploration ); précédent : 001333; suivant : 001335Increasing air humidity influences hydraulic efficiency but not functional vulnerability of xylem in hybrid aspen.
Auteurs : Arne Sellin [Estonie] ; Meeli Alber [Estonie] ; Priit Kupper [Estonie]Source :
- Journal of plant physiology [ 1618-1328 ] ; 2017.
Descripteurs français
- KwdFr :
- MESH :
- physiologie : Arbres, Populus, Pousses de plante, Tiges de plante, Xylème.
- Changement climatique, Climat, Humidité.
English descriptors
- KwdEn :
- MESH :
- physiology : Plant Shoots, Plant Stems, Populus, Trees, Xylem.
- Climate, Climate Change, Humidity.
Abstract
Climate models predict greater increases in the frequency than in the amount of precipitation and a consequent rise in atmospheric humidity at high latitudes by the end of the century. We investigated the responses of hydraulic and relevant anatomical traits of xylem to elevated relative humidity of air on a 1-yr-old coppice of hybrid aspen (Populus×wettsteinii) growing in the experimental stand at the Free Air Humidity Manipulation site in Eastern Estonia. The hydraulic conductivity of stems was measured with a high pressure flow meter; artificial cavitation in the stem segments was induced by the air injection method. Specific conductivity of xylem decreased from 4.42 in the control to 3.94kgm-1s-1MPa-1 in the humidification treatment, while the trend was well correlated with increasing wood density. Humidified trees exhibited smaller leaf area at the same xylem cross-sectional area, resulting in 34% higher average Huber values compared to the control. Control and humidity-treated trees differed by neither native embolism level nor susceptibility to dehydration-induced cavitation. Increasing atmospheric humidity reduces the hydraulic efficiency of hybrid aspen trees expressed on a xylem area basis and causes substantial changes in resource allocation between photosynthetic and water transport tissues. This climate trend does not influence stem vulnerability to cavitation.
DOI: 10.1016/j.jplph.2017.09.006
PubMed: 28985513
Affiliations:
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Electronic address: arne.sellin@ut.ee.</nlm:affiliation><country xml:lang="fr">Estonie</country><wicri:regionArea>Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, 51005 Tartu</wicri:regionArea><wicri:noRegion>51005 Tartu</wicri:noRegion></affiliation></author><author><name sortKey="Alber, Meeli" sort="Alber, Meeli" uniqKey="Alber M" first="Meeli" last="Alber">Meeli Alber</name><affiliation wicri:level="1"><nlm:affiliation>Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, 51005 Tartu, Estonia.</nlm:affiliation><country xml:lang="fr">Estonie</country><wicri:regionArea>Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, 51005 Tartu</wicri:regionArea><wicri:noRegion>51005 Tartu</wicri:noRegion></affiliation></author><author><name sortKey="Kupper, Priit" sort="Kupper, Priit" uniqKey="Kupper P" first="Priit" last="Kupper">Priit Kupper</name><affiliation wicri:level="1"><nlm:affiliation>Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, 51005 Tartu, Estonia.</nlm:affiliation><country xml:lang="fr">Estonie</country><wicri:regionArea>Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, 51005 Tartu</wicri:regionArea><wicri:noRegion>51005 Tartu</wicri:noRegion></affiliation></author></analytic><series><title level="j">Journal of plant physiology</title><idno type="eISSN">1618-1328</idno><imprint><date when="2017" type="published">2017</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Climate (MeSH)</term><term>Climate Change (MeSH)</term><term>Humidity (MeSH)</term><term>Plant Shoots (physiology)</term><term>Plant Stems (physiology)</term><term>Populus (physiology)</term><term>Trees (physiology)</term><term>Xylem (physiology)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Arbres (physiologie)</term><term>Changement climatique (MeSH)</term><term>Climat (MeSH)</term><term>Humidité (MeSH)</term><term>Populus (physiologie)</term><term>Pousses de plante (physiologie)</term><term>Tiges de plante (physiologie)</term><term>Xylème (physiologie)</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Arbres</term><term>Populus</term><term>Pousses de plante</term><term>Tiges de plante</term><term>Xylème</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Plant Shoots</term><term>Plant Stems</term><term>Populus</term><term>Trees</term><term>Xylem</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Climate</term><term>Climate Change</term><term>Humidity</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Changement climatique</term><term>Climat</term><term>Humidité</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Climate models predict greater increases in the frequency than in the amount of precipitation and a consequent rise in atmospheric humidity at high latitudes by the end of the century. We investigated the responses of hydraulic and relevant anatomical traits of xylem to elevated relative humidity of air on a 1-yr-old coppice of hybrid aspen (Populus×wettsteinii) growing in the experimental stand at the Free Air Humidity Manipulation site in Eastern Estonia. The hydraulic conductivity of stems was measured with a high pressure flow meter; artificial cavitation in the stem segments was induced by the air injection method. Specific conductivity of xylem decreased from 4.42 in the control to 3.94kgm<sup>-1</sup>s<sup>-1</sup>MPa<sup>-1</sup> in the humidification treatment, while the trend was well correlated with increasing wood density. Humidified trees exhibited smaller leaf area at the same xylem cross-sectional area, resulting in 34% higher average Huber values compared to the control. Control and humidity-treated trees differed by neither native embolism level nor susceptibility to dehydration-induced cavitation. Increasing atmospheric humidity reduces the hydraulic efficiency of hybrid aspen trees expressed on a xylem area basis and causes substantial changes in resource allocation between photosynthetic and water transport tissues. This climate trend does not influence stem vulnerability to cavitation.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">28985513</PMID><DateCompleted><Year>2018</Year><Month>06</Month><Day>14</Day></DateCompleted><DateRevised><Year>2020</Year><Month>09</Month><Day>30</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1618-1328</ISSN><JournalIssue CitedMedium="Internet"><Volume>219</Volume><PubDate><Year>2017</Year><Month>Dec</Month></PubDate></JournalIssue><Title>Journal of plant physiology</Title><ISOAbbreviation>J Plant Physiol</ISOAbbreviation></Journal><ArticleTitle>Increasing air humidity influences hydraulic efficiency but not functional vulnerability of xylem in hybrid aspen.</ArticleTitle><Pagination><MedlinePgn>28-36</MedlinePgn></Pagination><ELocationID EIdType="pii" ValidYN="Y">S0176-1617(17)30239-0</ELocationID><ELocationID EIdType="doi" ValidYN="Y">10.1016/j.jplph.2017.09.006</ELocationID><Abstract><AbstractText>Climate models predict greater increases in the frequency than in the amount of precipitation and a consequent rise in atmospheric humidity at high latitudes by the end of the century. We investigated the responses of hydraulic and relevant anatomical traits of xylem to elevated relative humidity of air on a 1-yr-old coppice of hybrid aspen (Populus×wettsteinii) growing in the experimental stand at the Free Air Humidity Manipulation site in Eastern Estonia. The hydraulic conductivity of stems was measured with a high pressure flow meter; artificial cavitation in the stem segments was induced by the air injection method. Specific conductivity of xylem decreased from 4.42 in the control to 3.94kgm<sup>-1</sup>s<sup>-1</sup>MPa<sup>-1</sup> in the humidification treatment, while the trend was well correlated with increasing wood density. Humidified trees exhibited smaller leaf area at the same xylem cross-sectional area, resulting in 34% higher average Huber values compared to the control. Control and humidity-treated trees differed by neither native embolism level nor susceptibility to dehydration-induced cavitation. Increasing atmospheric humidity reduces the hydraulic efficiency of hybrid aspen trees expressed on a xylem area basis and causes substantial changes in resource allocation between photosynthetic and water transport tissues. This climate trend does not influence stem vulnerability to cavitation.</AbstractText><CopyrightInformation>Copyright © 2017 Elsevier GmbH. All rights reserved.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Sellin</LastName><ForeName>Arne</ForeName><Initials>A</Initials><AffiliationInfo><Affiliation>Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, 51005 Tartu, Estonia. Electronic address: arne.sellin@ut.ee.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Alber</LastName><ForeName>Meeli</ForeName><Initials>M</Initials><AffiliationInfo><Affiliation>Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, 51005 Tartu, Estonia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Kupper</LastName><ForeName>Priit</ForeName><Initials>P</Initials><AffiliationInfo><Affiliation>Institute of Ecology and Earth Sciences, University of Tartu, Lai 40, 51005 Tartu, Estonia.</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>28</Day></ArticleDate></Article><MedlineJournalInfo><Country>Germany</Country><MedlineTA>J Plant Physiol</MedlineTA><NlmUniqueID>9882059</NlmUniqueID><ISSNLinking>0176-1617</ISSNLinking></MedlineJournalInfo><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D002980" MajorTopicYN="Y">Climate</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D057231" MajorTopicYN="N">Climate Change</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D006813" MajorTopicYN="N">Humidity</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018520" MajorTopicYN="N">Plant Shoots</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018547" MajorTopicYN="N">Plant Stems</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D014197" MajorTopicYN="N">Trees</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D052584" MajorTopicYN="N">Xylem</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading></MeshHeadingList><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Air humidity</Keyword><Keyword MajorTopicYN="N">Anatomical traits</Keyword><Keyword MajorTopicYN="N">Climate change</Keyword><Keyword MajorTopicYN="N">Hydraulic conductivity</Keyword><Keyword MajorTopicYN="N">Resource allocation</Keyword><Keyword MajorTopicYN="N">Xylem vulnerability</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2017</Year><Month>05</Month><Day>29</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2017</Year><Month>09</Month><Day>18</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2017</Year><Month>09</Month><Day>19</Day></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2017</Year><Month>10</Month><Day>7</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2018</Year><Month>6</Month><Day>15</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2017</Year><Month>10</Month><Day>7</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">28985513</ArticleId><ArticleId IdType="pii">S0176-1617(17)30239-0</ArticleId><ArticleId IdType="doi">10.1016/j.jplph.2017.09.006</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Estonie</li></country></list><tree><country name="Estonie"><noRegion><name sortKey="Sellin, Arne" sort="Sellin, Arne" uniqKey="Sellin A" first="Arne" last="Sellin">Arne Sellin</name></noRegion><name sortKey="Alber, Meeli" sort="Alber, Meeli" uniqKey="Alber M" first="Meeli" last="Alber">Meeli Alber</name><name sortKey="Kupper, Priit" sort="Kupper, Priit" uniqKey="Kupper P" first="Priit" last="Kupper">Priit Kupper</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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