Low root reserve accumulation during drought may lead to winter mortality in poplar seedlings.
Identifieur interne : 002600 ( Main/Exploration ); précédent : 002599; suivant : 002601Low root reserve accumulation during drought may lead to winter mortality in poplar seedlings.
Auteurs : David A. Galvez [Canada] ; S M Landh Usser ; M T TyreeSource :
- The New phytologist [ 1469-8137 ] ; 2013.
Descripteurs français
- KwdFr :
- Amidon (métabolisme), Dessiccation (MeSH), Eau (MeSH), Feuilles de plante (métabolisme), Gaz (métabolisme), Métabolisme glucidique (MeSH), Plant (croissance et développement), Plant (métabolisme), Populus (anatomie et histologie), Populus (croissance et développement), Racines de plante (métabolisme), Saisons (MeSH), Solubilité (MeSH), Spécificité d'organe (MeSH), Stomates de plante (physiologie), Sécheresses (MeSH), Tiges de plante (métabolisme).
- MESH :
- anatomie et histologie : Populus.
- croissance et développement : Plant, Populus.
- métabolisme : Amidon, Feuilles de plante, Gaz, Plant, Racines de plante, Tiges de plante.
- physiologie : Stomates de plante.
- Dessiccation, Eau, Métabolisme glucidique, Saisons, Solubilité, Spécificité d'organe, Sécheresses.
English descriptors
- KwdEn :
- Carbohydrate Metabolism (MeSH), Desiccation (MeSH), Droughts (MeSH), Gases (metabolism), Organ Specificity (MeSH), Plant Leaves (metabolism), Plant Roots (metabolism), Plant Stems (metabolism), Plant Stomata (physiology), Populus (anatomy & histology), Populus (growth & development), Seasons (MeSH), Seedlings (growth & development), Seedlings (metabolism), Solubility (MeSH), Starch (metabolism), Water (MeSH).
- MESH :
- chemical , metabolism : Gases, Starch.
- anatomy & histology : Populus.
- growth & development : Populus, Seedlings.
- metabolism : Plant Leaves, Plant Roots, Plant Stems, Seedlings.
- physiology : Plant Stomata.
- Carbohydrate Metabolism, Desiccation, Droughts, Organ Specificity, Seasons, Solubility, Water.
Abstract
Climate models suggest that more frequent drought events of greater severity and length, associated with climate change, can be expected in the coming decades. Although drought-induced tree mortality has been recognized as an important factor modulating forest demography at the global scale, the mechanisms underlying drought-induced tree mortality remain contentious. Above- and below-ground growth, gas exchange, water relations and carbon reserve accumulation dynamics at the organ and whole-plant scale were quantified in Populus tremuloides and P. balsamifera seedlings in response to severe drought. Seedlings were maintained in drought conditions over one growing and one dormant winter season. Our experiment presents a detailed description of the effect of severe drought on growth and physiological variables, leading to seedling mortality after an extended period of drought and dormancy. After re-watering following the dormant period, drought-exposed seedlings did not re-flush, showing that the root system had died off. The results of this study suggest a complex series of physiological feedbacks between the measured variables in both Populus species. Further, they reveal that reduced reserve accumulation in the root system during drought decreases the conversion of starch to soluble sugars in roots, which may contribute to the root death of drought-exposed seedlings during the dormant season by compromising the frost tolerance of the root system.
DOI: 10.1111/nph.12129
PubMed: 23347066
Affiliations:
Links toward previous steps (curation, corpus...)
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Galvez</name><affiliation wicri:level="1"><nlm:affiliation>Department of Renewable Resources, University of Alberta, 4-42 Earth Sciences Building, Edmonton, AB, T6G 2E3, Canada. david.galvez@ales.ualberta.ca</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Renewable Resources, University of Alberta, 4-42 Earth Sciences Building, Edmonton, AB, T6G 2E3</wicri:regionArea><wicri:noRegion>T6G 2E3</wicri:noRegion></affiliation></author><author><name sortKey="Landh Usser, S M" sort="Landh Usser, S M" uniqKey="Landh Usser S" first="S M" last="Landh Usser">S M Landh Usser</name></author><author><name sortKey="Tyree, M T" sort="Tyree, M T" uniqKey="Tyree M" first="M T" last="Tyree">M T Tyree</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2013">2013</date><idno type="RBID">pubmed:23347066</idno><idno type="pmid">23347066</idno><idno type="doi">10.1111/nph.12129</idno><idno type="wicri:Area/Main/Corpus">002719</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">002719</idno><idno type="wicri:Area/Main/Curation">002719</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">002719</idno><idno type="wicri:Area/Main/Exploration">002719</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Low root reserve accumulation during drought may lead to winter mortality in poplar seedlings.</title><author><name sortKey="Galvez, David A" sort="Galvez, David A" uniqKey="Galvez D" first="David A" last="Galvez">David A. Galvez</name><affiliation wicri:level="1"><nlm:affiliation>Department of Renewable Resources, University of Alberta, 4-42 Earth Sciences Building, Edmonton, AB, T6G 2E3, Canada. david.galvez@ales.ualberta.ca</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Department of Renewable Resources, University of Alberta, 4-42 Earth Sciences Building, Edmonton, AB, T6G 2E3</wicri:regionArea><wicri:noRegion>T6G 2E3</wicri:noRegion></affiliation></author><author><name sortKey="Landh Usser, S M" sort="Landh Usser, S M" uniqKey="Landh Usser S" first="S M" last="Landh Usser">S M Landh Usser</name></author><author><name sortKey="Tyree, M T" sort="Tyree, M T" uniqKey="Tyree M" first="M T" last="Tyree">M T Tyree</name></author></analytic><series><title level="j">The New phytologist</title><idno type="eISSN">1469-8137</idno><imprint><date when="2013" type="published">2013</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Carbohydrate Metabolism (MeSH)</term><term>Desiccation (MeSH)</term><term>Droughts (MeSH)</term><term>Gases (metabolism)</term><term>Organ Specificity (MeSH)</term><term>Plant Leaves (metabolism)</term><term>Plant Roots (metabolism)</term><term>Plant Stems (metabolism)</term><term>Plant Stomata (physiology)</term><term>Populus (anatomy & histology)</term><term>Populus (growth & development)</term><term>Seasons (MeSH)</term><term>Seedlings (growth & development)</term><term>Seedlings (metabolism)</term><term>Solubility (MeSH)</term><term>Starch (metabolism)</term><term>Water (MeSH)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Amidon (métabolisme)</term><term>Dessiccation (MeSH)</term><term>Eau (MeSH)</term><term>Feuilles de plante (métabolisme)</term><term>Gaz (métabolisme)</term><term>Métabolisme glucidique (MeSH)</term><term>Plant (croissance et développement)</term><term>Plant (métabolisme)</term><term>Populus (anatomie et histologie)</term><term>Populus (croissance et développement)</term><term>Racines de plante (métabolisme)</term><term>Saisons (MeSH)</term><term>Solubilité (MeSH)</term><term>Spécificité d'organe (MeSH)</term><term>Stomates de plante (physiologie)</term><term>Sécheresses (MeSH)</term><term>Tiges de plante (métabolisme)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Gases</term><term>Starch</term></keywords><keywords scheme="MESH" qualifier="anatomie et histologie" xml:lang="fr"><term>Populus</term></keywords><keywords scheme="MESH" qualifier="anatomy & histology" xml:lang="en"><term>Populus</term></keywords><keywords scheme="MESH" qualifier="croissance et développement" xml:lang="fr"><term>Plant</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Populus</term><term>Seedlings</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Plant Leaves</term><term>Plant Roots</term><term>Plant Stems</term><term>Seedlings</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Amidon</term><term>Feuilles de plante</term><term>Gaz</term><term>Plant</term><term>Racines de plante</term><term>Tiges de plante</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Stomates de plante</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Plant Stomata</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Carbohydrate Metabolism</term><term>Desiccation</term><term>Droughts</term><term>Organ Specificity</term><term>Seasons</term><term>Solubility</term><term>Water</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Dessiccation</term><term>Eau</term><term>Métabolisme glucidique</term><term>Saisons</term><term>Solubilité</term><term>Spécificité d'organe</term><term>Sécheresses</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Climate models suggest that more frequent drought events of greater severity and length, associated with climate change, can be expected in the coming decades. Although drought-induced tree mortality has been recognized as an important factor modulating forest demography at the global scale, the mechanisms underlying drought-induced tree mortality remain contentious. Above- and below-ground growth, gas exchange, water relations and carbon reserve accumulation dynamics at the organ and whole-plant scale were quantified in Populus tremuloides and P. balsamifera seedlings in response to severe drought. Seedlings were maintained in drought conditions over one growing and one dormant winter season. Our experiment presents a detailed description of the effect of severe drought on growth and physiological variables, leading to seedling mortality after an extended period of drought and dormancy. After re-watering following the dormant period, drought-exposed seedlings did not re-flush, showing that the root system had died off. The results of this study suggest a complex series of physiological feedbacks between the measured variables in both Populus species. Further, they reveal that reduced reserve accumulation in the root system during drought decreases the conversion of starch to soluble sugars in roots, which may contribute to the root death of drought-exposed seedlings during the dormant season by compromising the frost tolerance of the root system.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">23347066</PMID><DateCompleted><Year>2013</Year><Month>08</Month><Day>07</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>198</Volume><Issue>1</Issue><PubDate><Year>2013</Year><Month>Apr</Month></PubDate></JournalIssue><Title>The New phytologist</Title><ISOAbbreviation>New Phytol</ISOAbbreviation></Journal><ArticleTitle>Low root reserve accumulation during drought may lead to winter mortality in poplar seedlings.</ArticleTitle><Pagination><MedlinePgn>139-48</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1111/nph.12129</ELocationID><Abstract><AbstractText>Climate models suggest that more frequent drought events of greater severity and length, associated with climate change, can be expected in the coming decades. Although drought-induced tree mortality has been recognized as an important factor modulating forest demography at the global scale, the mechanisms underlying drought-induced tree mortality remain contentious. Above- and below-ground growth, gas exchange, water relations and carbon reserve accumulation dynamics at the organ and whole-plant scale were quantified in Populus tremuloides and P. balsamifera seedlings in response to severe drought. Seedlings were maintained in drought conditions over one growing and one dormant winter season. Our experiment presents a detailed description of the effect of severe drought on growth and physiological variables, leading to seedling mortality after an extended period of drought and dormancy. After re-watering following the dormant period, drought-exposed seedlings did not re-flush, showing that the root system had died off. The results of this study suggest a complex series of physiological feedbacks between the measured variables in both Populus species. Further, they reveal that reduced reserve accumulation in the root system during drought decreases the conversion of starch to soluble sugars in roots, which may contribute to the root death of drought-exposed seedlings during the dormant season by compromising the frost tolerance of the root system.</AbstractText><CopyrightInformation>© 2013 The Authors. New Phytologist © 2013 New Phytologist Trust.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Galvez</LastName><ForeName>David A</ForeName><Initials>DA</Initials><AffiliationInfo><Affiliation>Department of Renewable Resources, University of Alberta, 4-42 Earth Sciences Building, Edmonton, AB, T6G 2E3, Canada. david.galvez@ales.ualberta.ca</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Landhäusser</LastName><ForeName>S M</ForeName><Initials>SM</Initials></Author><Author ValidYN="Y"><LastName>Tyree</LastName><ForeName>M T</ForeName><Initials>MT</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType></PublicationTypeList><ArticleDate 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MajorTopicYN="Y">Droughts</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D005740" MajorTopicYN="N">Gases</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D009928" MajorTopicYN="N">Organ Specificity</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018515" MajorTopicYN="N">Plant Leaves</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018517" MajorTopicYN="N">Plant Roots</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018547" MajorTopicYN="N">Plant Stems</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D054046" MajorTopicYN="N">Plant Stomata</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="N">Populus</DescriptorName><QualifierName UI="Q000033" MajorTopicYN="N">anatomy & histology</QualifierName><QualifierName UI="Q000254" MajorTopicYN="Y">growth & development</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D012621" MajorTopicYN="Y">Seasons</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D036226" MajorTopicYN="N">Seedlings</DescriptorName><QualifierName UI="Q000254" MajorTopicYN="Y">growth & development</QualifierName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D012995" MajorTopicYN="N">Solubility</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D013213" MajorTopicYN="N">Starch</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D014867" MajorTopicYN="N">Water</DescriptorName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2012</Year><Month>11</Month><Day>29</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2012</Year><Month>12</Month><Day>04</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2013</Year><Month>1</Month><Day>26</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2013</Year><Month>1</Month><Day>26</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2013</Year><Month>8</Month><Day>8</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">23347066</ArticleId><ArticleId IdType="doi">10.1111/nph.12129</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Canada</li></country></list><tree><noCountry><name sortKey="Landh Usser, S M" sort="Landh Usser, S M" uniqKey="Landh Usser S" first="S M" last="Landh Usser">S M Landh Usser</name><name sortKey="Tyree, M T" sort="Tyree, M T" uniqKey="Tyree M" first="M T" last="Tyree">M T Tyree</name></noCountry><country name="Canada"><noRegion><name sortKey="Galvez, David A" sort="Galvez, David A" uniqKey="Galvez D" first="David A" last="Galvez">David A. 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