Woody tissue photosynthesis delays drought stress in Populus tremula trees and maintains starch reserves in branch xylem tissues.
Identifieur interne : 000019 ( Main/Exploration ); précédent : 000018; suivant : 000020Woody tissue photosynthesis delays drought stress in Populus tremula trees and maintains starch reserves in branch xylem tissues.
Auteurs : Linus De Roo [Belgique] ; Roberto Luis Salom N [Belgique] ; Jacek Oleksyn [Pologne] ; Kathy Steppe [Belgique]Source :
- The New phytologist [ 1469-8137 ] ; 2020.
Abstract
Photosynthesis in woody tissues (Pwt ) is less sensitive to water shortage than in leaves, hence, Pwt might be a crucial carbon source to alleviate drought stress. To evaluate the impact of Pwt on tree drought tolerance, woody tissues of 4-m-tall drought-stressed Populus tremula trees were subjected to a light-exclusion treatment across the entire plant to inhibit Pwt . Xylem water potential (Ψxylem ), sap flow ( F H 2 O F H 2 O F H 2 O F H 2 O
DOI: 10.1111/nph.16662
PubMed: 32416019
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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, Faculty of Bioscience Engineering, Ghent University, B-9000, Ghent, Belgium.</nlm:affiliation><country xml:lang="fr">Belgique</country><wicri:regionArea>Laboratory of Plant Ecology, Faculty of Bioscience Engineering, Ghent University, B-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="Oleksyn, Jacek" sort="Oleksyn, Jacek" uniqKey="Oleksyn J" first="Jacek" last="Oleksyn">Jacek Oleksyn</name><affiliation wicri:level="1"><nlm:affiliation>Institute of Dendrology, Polish Academy of Sciences, Parkowa 5, PL-62-035, Kórnik, Poland.</nlm:affiliation><country xml:lang="fr">Pologne</country><wicri:regionArea>Institute of Dendrology, Polish Academy of Sciences, Parkowa 5, PL-62-035, Kórnik</wicri:regionArea><wicri:noRegion>Kórnik</wicri:noRegion></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, Faculty of Bioscience Engineering, Ghent University, B-9000, Ghent, Belgium.</nlm:affiliation><country xml:lang="fr">Belgique</country><wicri:regionArea>Laboratory of Plant Ecology, Faculty of Bioscience Engineering, Ghent University, B-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></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2020">2020</date><idno type="RBID">pubmed:32416019</idno><idno type="pmid">32416019</idno><idno type="doi">10.1111/nph.16662</idno><idno type="wicri:Area/Main/Corpus">000299</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">000299</idno><idno type="wicri:Area/Main/Curation">000299</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">000299</idno><idno type="wicri:Area/Main/Exploration">000299</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Woody tissue photosynthesis delays drought stress in Populus tremula trees and maintains starch reserves in branch xylem tissues.</title><author><name sortKey="De Roo, Linus" sort="De Roo, Linus" uniqKey="De Roo L" first="Linus" last="De Roo">Linus De Roo</name><affiliation wicri:level="4"><nlm:affiliation>Laboratory of Plant Ecology, Faculty of Bioscience Engineering, Ghent University, B-9000, Ghent, Belgium.</nlm:affiliation><country xml:lang="fr">Belgique</country><wicri:regionArea>Laboratory of Plant Ecology, Faculty of Bioscience Engineering, Ghent University, B-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, Faculty of Bioscience Engineering, Ghent University, B-9000, Ghent, Belgium.</nlm:affiliation><country xml:lang="fr">Belgique</country><wicri:regionArea>Laboratory of Plant Ecology, Faculty of Bioscience Engineering, Ghent University, B-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="Oleksyn, Jacek" sort="Oleksyn, Jacek" uniqKey="Oleksyn J" first="Jacek" last="Oleksyn">Jacek Oleksyn</name><affiliation wicri:level="1"><nlm:affiliation>Institute of Dendrology, Polish Academy of Sciences, Parkowa 5, PL-62-035, Kórnik, Poland.</nlm:affiliation><country xml:lang="fr">Pologne</country><wicri:regionArea>Institute of Dendrology, Polish Academy of Sciences, Parkowa 5, PL-62-035, Kórnik</wicri:regionArea><wicri:noRegion>Kórnik</wicri:noRegion></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, Faculty of Bioscience Engineering, Ghent University, B-9000, Ghent, Belgium.</nlm:affiliation><country xml:lang="fr">Belgique</country><wicri:regionArea>Laboratory of Plant Ecology, Faculty of Bioscience Engineering, Ghent University, B-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="2020" type="published">2020</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Photosynthesis in woody tissues (P<sub>wt</sub> ) is less sensitive to water shortage than in leaves, hence, P<sub>wt</sub> might be a crucial carbon source to alleviate drought stress. To evaluate the impact of P<sub>wt</sub> on tree drought tolerance, woody tissues of 4-m-tall drought-stressed Populus tremula trees were subjected to a light-exclusion treatment across the entire plant to inhibit P<sub>wt</sub> . Xylem water potential (Ψ<sub>xylem</sub> ), sap flow ( <mml:math><mml:msub><mml:mi>F</mml:mi><mml:mrow><mml:msub><mml:mi>H</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi>O</mml:mi></mml:mrow></mml:msub></mml:math> ), leaf net photosynthesis (P<sub>n,l</sub> ), stem diameter variations (ΔD), in vivo acoustic emissions in stems (AEs) and nonstructural carbohydrate concentrations ([NSC]) were monitored to comprehensively assess water and carbon relations at whole-tree level. Under well-watered conditions, P<sub>wt</sub> kept Ψ<sub>xylem</sub> at a higher level, lowered <mml:math><mml:msub><mml:mi>F</mml:mi><mml:mrow><mml:msub><mml:mi>H</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi>O</mml:mi></mml:mrow></mml:msub></mml:math> and had no effect on [NSC]. Under drought, Ψ<sub>xylem</sub> , <mml:math><mml:msub><mml:mi>F</mml:mi><mml:mrow><mml:msub><mml:mi>H</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi>O</mml:mi></mml:mrow></mml:msub></mml:math> and P<sub>n,l</sub> in light-excluded trees rapidly decreased in concert with reductions in branch xylem starch concentration. Moreover, sub-daily patterns of ΔD, <mml:math><mml:msub><mml:mi>F</mml:mi><mml:mrow><mml:msub><mml:mi>H</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi>O</mml:mi></mml:mrow></mml:msub></mml:math> and AEs were strongly related, suggesting that in vivo AEs may inform not only about embolism events, but also about capacitive release and replenishment of stem water pools. Results highlight the importance of P<sub>wt</sub> in maintaining xylem hydraulic integrity under drought conditions and in sustaining NSC pools to potentially limit increases in xylem tension.</div></front></TEI><pubmed><MedlineCitation Status="Publisher" Owner="NLM"><PMID Version="1">32416019</PMID><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"><PubDate><Year>2020</Year><Month>May</Month><Day>16</Day></PubDate></JournalIssue><Title>The New phytologist</Title><ISOAbbreviation>New Phytol</ISOAbbreviation></Journal><ArticleTitle>Woody tissue photosynthesis delays drought stress in Populus tremula trees and maintains starch reserves in branch xylem tissues.</ArticleTitle><ELocationID EIdType="doi" ValidYN="Y">10.1111/nph.16662</ELocationID><Abstract><AbstractText>Photosynthesis in woody tissues (P<sub>wt</sub> ) is less sensitive to water shortage than in leaves, hence, P<sub>wt</sub> might be a crucial carbon source to alleviate drought stress. To evaluate the impact of P<sub>wt</sub> on tree drought tolerance, woody tissues of 4-m-tall drought-stressed Populus tremula trees were subjected to a light-exclusion treatment across the entire plant to inhibit P<sub>wt</sub> . Xylem water potential (Ψ<sub>xylem</sub> ), sap flow ( <mml:math><mml:msub><mml:mi>F</mml:mi><mml:mrow><mml:msub><mml:mi>H</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi>O</mml:mi></mml:mrow></mml:msub></mml:math> ), leaf net photosynthesis (P<sub>n,l</sub> ), stem diameter variations (ΔD), in vivo acoustic emissions in stems (AEs) and nonstructural carbohydrate concentrations ([NSC]) were monitored to comprehensively assess water and carbon relations at whole-tree level. Under well-watered conditions, P<sub>wt</sub> kept Ψ<sub>xylem</sub> at a higher level, lowered <mml:math><mml:msub><mml:mi>F</mml:mi><mml:mrow><mml:msub><mml:mi>H</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi>O</mml:mi></mml:mrow></mml:msub></mml:math> and had no effect on [NSC]. Under drought, Ψ<sub>xylem</sub> , <mml:math><mml:msub><mml:mi>F</mml:mi><mml:mrow><mml:msub><mml:mi>H</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi>O</mml:mi></mml:mrow></mml:msub></mml:math> and P<sub>n,l</sub> in light-excluded trees rapidly decreased in concert with reductions in branch xylem starch concentration. Moreover, sub-daily patterns of ΔD, <mml:math><mml:msub><mml:mi>F</mml:mi><mml:mrow><mml:msub><mml:mi>H</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi>O</mml:mi></mml:mrow></mml:msub></mml:math> and AEs were strongly related, suggesting that in vivo AEs may inform not only about embolism events, but also about capacitive release and replenishment of stem water pools. Results highlight the importance of P<sub>wt</sub> in maintaining xylem hydraulic integrity under drought conditions and in sustaining NSC pools to potentially limit increases in xylem tension.</AbstractText><CopyrightInformation>© 2020 The Authors. New Phytologist © 2020 New Phytologist Trust.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>De Roo</LastName><ForeName>Linus</ForeName><Initials>L</Initials><Identifier Source="ORCID">https://orcid.org/0000-0002-3627-1406</Identifier><AffiliationInfo><Affiliation>Laboratory of Plant Ecology, Faculty of Bioscience Engineering, Ghent University, B-9000, Ghent, Belgium.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Salomón</LastName><ForeName>Roberto Luis</ForeName><Initials>RL</Initials><Identifier Source="ORCID">https://orcid.org/0000-0003-2674-1731</Identifier><AffiliationInfo><Affiliation>Laboratory of Plant Ecology, Faculty of Bioscience Engineering, Ghent University, B-9000, Ghent, Belgium.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Oleksyn</LastName><ForeName>Jacek</ForeName><Initials>J</Initials><AffiliationInfo><Affiliation>Institute of Dendrology, Polish Academy of Sciences, Parkowa 5, PL-62-035, Kórnik, Poland.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Steppe</LastName><ForeName>Kathy</ForeName><Initials>K</Initials><Identifier Source="ORCID">https://orcid.org/0000-0001-6252-0704</Identifier><AffiliationInfo><Affiliation>Laboratory of Plant Ecology, Faculty of Bioscience Engineering, Ghent University, B-9000, Ghent, Belgium.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><GrantList CompleteYN="Y"><Grant><GrantID>G.0941.15N</GrantID><Agency>Research Foundation Flanders (FWO)</Agency><Country></Country></Grant><Grant><GrantID>665501</GrantID><Agency>European Union's Horizon 2020</Agency><Country></Country></Grant></GrantList><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2020</Year><Month>05</Month><Day>16</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>New Phytol</MedlineTA><NlmUniqueID>9882884</NlmUniqueID><ISSNLinking>0028-646X</ISSNLinking></MedlineJournalInfo><CitationSubset>IM</CitationSubset><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Populus tremula
</Keyword><Keyword MajorTopicYN="N">acoustic emissions</Keyword><Keyword MajorTopicYN="N">corticular photosynthesis</Keyword><Keyword MajorTopicYN="N">drought-induced tree mortality</Keyword><Keyword MajorTopicYN="N">nonstructural carbohydrates</Keyword><Keyword MajorTopicYN="N">stem recycling photosynthesis</Keyword><Keyword MajorTopicYN="N">woody tissue photosynthesis</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2020</Year><Month>03</Month><Day>20</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2020</Year><Month>05</Month><Day>04</Day></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2020</Year><Month>5</Month><Day>18</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2020</Year><Month>5</Month><Day>18</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2020</Year><Month>5</Month><Day>17</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>aheadofprint</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">32416019</ArticleId><ArticleId IdType="doi">10.1111/nph.16662</ArticleId></ArticleIdList><ReferenceList><Title>References</Title><Reference><Citation>Allen RG, Pereira LS, Raes D, Smith M. 1998. 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