Greater efficiency of water use in poplar clones having a delayed response of mesophyll conductance to drought.
Identifieur interne : 001D20 ( Main/Exploration ); précédent : 001D19; suivant : 001D21Greater efficiency of water use in poplar clones having a delayed response of mesophyll conductance to drought.
Auteurs : Guillaume Théroux Rancourt [Canada] ; Gilbert Éthier [Canada] ; Steeve Pepin [Canada]Source :
- Tree physiology [ 1758-4469 ] ; 2015.
Descripteurs français
- KwdFr :
- Adaptation physiologique (génétique), Carbone (métabolisme), Eau (physiologie), Feuilles de plante (métabolisme), Feuilles de plante (physiologie), Génotype (MeSH), Irrigation agricole (MeSH), Photosynthèse (MeSH), Populus (génétique), Populus (métabolisme), Populus (physiologie), Sol (MeSH), Stomates de plante (MeSH), Stress physiologique (génétique), Sécheresses (MeSH), Transpiration des plantes (MeSH).
- MESH :
- génétique : Adaptation physiologique, Populus, Stress physiologique.
- métabolisme : Carbone, Feuilles de plante, Populus.
- physiologie : Eau, Feuilles de plante, Populus.
- Génotype, Irrigation agricole, Photosynthèse, Sol, Stomates de plante, Sécheresses, Transpiration des plantes.
English descriptors
- KwdEn :
- Adaptation, Physiological (genetics), Agricultural Irrigation (MeSH), Carbon (metabolism), Droughts (MeSH), Genotype (MeSH), Photosynthesis (MeSH), Plant Leaves (metabolism), Plant Leaves (physiology), Plant Stomata (MeSH), Plant Transpiration (MeSH), Populus (genetics), Populus (metabolism), Populus (physiology), Soil (MeSH), Stress, Physiological (genetics), Water (physiology).
- MESH :
- chemical , metabolism : Carbon.
- genetics : Adaptation, Physiological, Populus, Stress, Physiological.
- metabolism : Plant Leaves, Populus.
- physiology : Plant Leaves, Populus, Water.
- Agricultural Irrigation, Droughts, Genotype, Photosynthesis, Plant Stomata, Plant Transpiration, Soil.
Abstract
Improvement of water use efficiency is a key objective to improve the sustainability of cultivated plants, especially fast growing species with high water consumption like poplar. It is well known that water use efficiency (WUE) varies considerably among poplar genotypes, and it was recently suggested that the use of the mesophyll-to-stomatal conductance ratio (gm/gs) would be an appropriate trait to improve WUE. The responses of 7-week-old cuttings of four hybrid poplar clones and one native Balsam poplar (Populus balsamifera L.) to a water stress-recovery cycle were examined to evaluate the relation between the gm/gs ratio and transpiration efficiency (TE), a leaf-level component of WUE. A contrasting gs response to water stress was observed among the five clones, from stomatal closure early on during soil drying up to limited closure in Balsam poplar. However in the hybrids, the decline in gm was consistently delayed by a few days compared with gs. Moreover, in the most water use-efficient hybrids, the recovery following rehydration occurred faster for gm than for gs. Thus, the delay in the response of gm to drought and its faster recovery upon rewatering increased the gm/gs of the hybrids and this ratio scaled positively with TE. Our results support the use of the gm/gs ratio to select genotypes with improved WUE, and the notion that breeding strategies focusing mainly on stomatal responses to soil drying should also look for a strong curvilinearity between net carbon assimilation rate and gs, the indication of a significant increase in gm/gs in the earlier stages of stomatal closure.
DOI: 10.1093/treephys/tpv006
PubMed: 25721370
Affiliations:
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Rancourt</name><affiliation wicri:level="4"><nlm:affiliation>Department of Plant Sciences, Horticultural Research Center, Université Laval, Québec, QC, Canada, G1V 0A6.</nlm:affiliation><orgName type="university">Université Laval</orgName><country>Canada</country><placeName><settlement type="city">Québec (ville)</settlement><region type="state">Québec</region></placeName></affiliation></author><author><name sortKey="Ethier, Gilbert" sort="Ethier, Gilbert" uniqKey="Ethier G" first="Gilbert" last="Éthier">Gilbert Éthier</name><affiliation wicri:level="4"><nlm:affiliation>Department of Plant Sciences, Horticultural Research Center, Université Laval, Québec, QC, Canada, G1V 0A6.</nlm:affiliation><orgName type="university">Université Laval</orgName><country>Canada</country><placeName><settlement type="city">Québec (ville)</settlement><region type="state">Québec</region></placeName></affiliation></author><author><name sortKey="Pepin, Steeve" sort="Pepin, Steeve" uniqKey="Pepin S" first="Steeve" last="Pepin">Steeve Pepin</name><affiliation wicri:level="4"><nlm:affiliation>Department of Soil and Agri-Food Engineering, Horticultural Research Center, Université Laval, Québec, QC, Canada, G1V 0A6 steeve.pepin@fsaa.ulaval.ca.</nlm:affiliation><country wicri:rule="url">Canada</country><wicri:regionArea>Department of Soil and Agri-Food Engineering, Horticultural Research Center, Université Laval, Québec, QC, Canada</wicri:regionArea><orgName type="university">Université Laval</orgName><placeName><settlement type="city">Québec (ville)</settlement><region type="state">Québec</region></placeName></affiliation></author></analytic><series><title level="j">Tree physiology</title><idno type="eISSN">1758-4469</idno><imprint><date when="2015" type="published">2015</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adaptation, Physiological (genetics)</term><term>Agricultural Irrigation (MeSH)</term><term>Carbon (metabolism)</term><term>Droughts (MeSH)</term><term>Genotype (MeSH)</term><term>Photosynthesis (MeSH)</term><term>Plant Leaves (metabolism)</term><term>Plant Leaves (physiology)</term><term>Plant Stomata (MeSH)</term><term>Plant Transpiration (MeSH)</term><term>Populus (genetics)</term><term>Populus (metabolism)</term><term>Populus (physiology)</term><term>Soil (MeSH)</term><term>Stress, Physiological (genetics)</term><term>Water (physiology)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Adaptation physiologique (génétique)</term><term>Carbone (métabolisme)</term><term>Eau (physiologie)</term><term>Feuilles de plante (métabolisme)</term><term>Feuilles de plante (physiologie)</term><term>Génotype (MeSH)</term><term>Irrigation agricole (MeSH)</term><term>Photosynthèse (MeSH)</term><term>Populus (génétique)</term><term>Populus (métabolisme)</term><term>Populus (physiologie)</term><term>Sol (MeSH)</term><term>Stomates de plante (MeSH)</term><term>Stress physiologique (génétique)</term><term>Sécheresses (MeSH)</term><term>Transpiration des plantes (MeSH)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Carbon</term></keywords><keywords scheme="MESH" qualifier="genetics" xml:lang="en"><term>Adaptation, Physiological</term><term>Populus</term><term>Stress, Physiological</term></keywords><keywords scheme="MESH" qualifier="génétique" xml:lang="fr"><term>Adaptation physiologique</term><term>Populus</term><term>Stress physiologique</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Plant Leaves</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Carbone</term><term>Feuilles de plante</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Eau</term><term>Feuilles de plante</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Plant Leaves</term><term>Populus</term><term>Water</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Agricultural Irrigation</term><term>Droughts</term><term>Genotype</term><term>Photosynthesis</term><term>Plant Stomata</term><term>Plant Transpiration</term><term>Soil</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Génotype</term><term>Irrigation agricole</term><term>Photosynthèse</term><term>Sol</term><term>Stomates de plante</term><term>Sécheresses</term><term>Transpiration des plantes</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Improvement of water use efficiency is a key objective to improve the sustainability of cultivated plants, especially fast growing species with high water consumption like poplar. It is well known that water use efficiency (WUE) varies considerably among poplar genotypes, and it was recently suggested that the use of the mesophyll-to-stomatal conductance ratio (gm/gs) would be an appropriate trait to improve WUE. The responses of 7-week-old cuttings of four hybrid poplar clones and one native Balsam poplar (Populus balsamifera L.) to a water stress-recovery cycle were examined to evaluate the relation between the gm/gs ratio and transpiration efficiency (TE), a leaf-level component of WUE. A contrasting gs response to water stress was observed among the five clones, from stomatal closure early on during soil drying up to limited closure in Balsam poplar. However in the hybrids, the decline in gm was consistently delayed by a few days compared with gs. Moreover, in the most water use-efficient hybrids, the recovery following rehydration occurred faster for gm than for gs. Thus, the delay in the response of gm to drought and its faster recovery upon rewatering increased the gm/gs of the hybrids and this ratio scaled positively with TE. Our results support the use of the gm/gs ratio to select genotypes with improved WUE, and the notion that breeding strategies focusing mainly on stomatal responses to soil drying should also look for a strong curvilinearity between net carbon assimilation rate and gs, the indication of a significant increase in gm/gs in the earlier stages of stomatal closure. </div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">25721370</PMID><DateCompleted><Year>2015</Year><Month>10</Month><Day>28</Day></DateCompleted><DateRevised><Year>2017</Year><Month>11</Month><Day>16</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1758-4469</ISSN><JournalIssue CitedMedium="Internet"><Volume>35</Volume><Issue>2</Issue><PubDate><Year>2015</Year><Month>Feb</Month></PubDate></JournalIssue><Title>Tree physiology</Title><ISOAbbreviation>Tree Physiol</ISOAbbreviation></Journal><ArticleTitle>Greater efficiency of water use in poplar clones having a delayed response of mesophyll conductance to drought.</ArticleTitle><Pagination><MedlinePgn>172-84</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1093/treephys/tpv006</ELocationID><Abstract><AbstractText>Improvement of water use efficiency is a key objective to improve the sustainability of cultivated plants, especially fast growing species with high water consumption like poplar. It is well known that water use efficiency (WUE) varies considerably among poplar genotypes, and it was recently suggested that the use of the mesophyll-to-stomatal conductance ratio (gm/gs) would be an appropriate trait to improve WUE. The responses of 7-week-old cuttings of four hybrid poplar clones and one native Balsam poplar (Populus balsamifera L.) to a water stress-recovery cycle were examined to evaluate the relation between the gm/gs ratio and transpiration efficiency (TE), a leaf-level component of WUE. A contrasting gs response to water stress was observed among the five clones, from stomatal closure early on during soil drying up to limited closure in Balsam poplar. However in the hybrids, the decline in gm was consistently delayed by a few days compared with gs. Moreover, in the most water use-efficient hybrids, the recovery following rehydration occurred faster for gm than for gs. Thus, the delay in the response of gm to drought and its faster recovery upon rewatering increased the gm/gs of the hybrids and this ratio scaled positively with TE. Our results support the use of the gm/gs ratio to select genotypes with improved WUE, and the notion that breeding strategies focusing mainly on stomatal responses to soil drying should also look for a strong curvilinearity between net carbon assimilation rate and gs, the indication of a significant increase in gm/gs in the earlier stages of stomatal closure. </AbstractText><CopyrightInformation>© The Author 2015. 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>Théroux Rancourt</LastName><ForeName>Guillaume</ForeName><Initials>G</Initials><AffiliationInfo><Affiliation>Department of Plant Sciences, Horticultural Research Center, Université Laval, Québec, QC, Canada, G1V 0A6.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Éthier</LastName><ForeName>Gilbert</ForeName><Initials>G</Initials><AffiliationInfo><Affiliation>Department of Plant Sciences, Horticultural Research Center, Université Laval, Québec, QC, Canada, G1V 0A6.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Pepin</LastName><ForeName>Steeve</ForeName><Initials>S</Initials><AffiliationInfo><Affiliation>Department of Soil and Agri-Food Engineering, Horticultural Research Center, Université Laval, Québec, QC, Canada, G1V 0A6 steeve.pepin@fsaa.ulaval.ca.</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><ArticleDate DateType="Electronic"><Year>2015</Year><Month>02</Month><Day>25</Day></ArticleDate></Article><MedlineJournalInfo><Country>Canada</Country><MedlineTA>Tree Physiol</MedlineTA><NlmUniqueID>100955338</NlmUniqueID><ISSNLinking>0829-318X</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D012987">Soil</NameOfSubstance></Chemical><Chemical><RegistryNumber>059QF0KO0R</RegistryNumber><NameOfSubstance UI="D014867">Water</NameOfSubstance></Chemical><Chemical><RegistryNumber>7440-44-0</RegistryNumber><NameOfSubstance 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