Soil moisture heterogeneity regulates water use in Populus nigra L. by altering root and xylem sap phytohormone concentrations.
Identifieur interne : 000113 ( Main/Exploration ); précédent : 000112; suivant : 000114Soil moisture heterogeneity regulates water use in Populus nigra L. by altering root and xylem sap phytohormone concentrations.
Auteurs : Jaime Puértolas [Royaume-Uni] ; Marta Pardos [Espagne] ; Carlos De Ollas [Espagne] ; Alfonso Albacete [Espagne] ; Ian C. Dodd [Royaume-Uni]Source :
- Tree physiology [ 1758-4469 ] ; 2020.
Descripteurs français
- KwdFr :
- MESH :
English descriptors
- KwdEn :
- MESH :
- chemical : Abscisic Acid, Plant Growth Regulators, Soil, Water.
- Plant Leaves, Plant Roots, Plant Transpiration, Populus, Xylem.
Abstract
Soil moisture heterogeneity in the root zone is common both during the establishment of tree seedlings and in experiments aiming to impose semi-constant soil moisture deficits, but its effects on regulating plant water use compared with homogenous soil drying are not well known in trees. Pronounced vertical soil moisture heterogeneity was imposed on black poplar (Populus nigra L.) grown in soil columns by altering irrigation frequency, to test whether plant water use, hydraulic responses, root phytohormone concentrations and root xylem sap chemical composition differed between wet (well-watered, WW), and homogeneously (infrequent deficit irrigation, IDI) and heterogeneously dry soil (frequent deficit irrigation, FDI). At the same bulk soil water content, FDI plants had greater water use than IDI plants, probably because root abscisic acid (ABA) concentration was low in the upper wetter layer of FDI plants, which maintained root xylem sap ABA concentration at basal levels in contrast with IDI. Soil drying did not increase root xylem concentration of any other hormone. Nevertheless, plant-to-plant variation in xylem jasmonic acid (JA) concentration was negatively related to leaf stomatal conductance within WW and FDI plants. However, feeding detached leaves with high (1200 nM) JA concentrations via the transpiration stream decreased transpiration only marginally. Xylem pH and sulphate concentration decreased in FDI plants compared with well-watered plants. Frequent deficit irrigation increased root accumulation of the cytokinin trans-zeatin (tZ), especially in the dry lower layer, and of the ethylene precursor 1-aminocyclopropane-1-carboxylic acid (ACC), in the wet upper soil layer. Root hormone accumulation might explain the maintenance of high root hydraulic conductance and water use in FDI plants (similar to well-watered plants) compared with IDI plants. In irrigated tree crops, growers could vary irrigation scheduling to control water use by altering the hormone balance.
DOI: 10.1093/treephys/tpaa037
PubMed: 32193548
Affiliations:
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Dodd</name><affiliation wicri:level="1"><nlm:affiliation>Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, UK.</nlm:affiliation><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ</wicri:regionArea><wicri:noRegion>Lancaster LA1 4YQ</wicri:noRegion></affiliation></author></analytic><series><title level="j">Tree physiology</title><idno type="eISSN">1758-4469</idno><imprint><date when="2020" type="published">2020</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Abscisic Acid (MeSH)</term><term>Plant Growth Regulators (MeSH)</term><term>Plant Leaves (MeSH)</term><term>Plant Roots (MeSH)</term><term>Plant Transpiration (MeSH)</term><term>Populus (MeSH)</term><term>Soil (MeSH)</term><term>Water (MeSH)</term><term>Xylem (MeSH)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Acide abscissique (MeSH)</term><term>Eau (MeSH)</term><term>Facteur de croissance végétal (MeSH)</term><term>Feuilles de plante (MeSH)</term><term>Populus (MeSH)</term><term>Racines de plante (MeSH)</term><term>Sol (MeSH)</term><term>Transpiration des plantes (MeSH)</term><term>Xylème (MeSH)</term></keywords><keywords scheme="MESH" type="chemical" xml:lang="en"><term>Abscisic Acid</term><term>Plant Growth Regulators</term><term>Soil</term><term>Water</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Plant Leaves</term><term>Plant Roots</term><term>Plant Transpiration</term><term>Populus</term><term>Xylem</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Acide abscissique</term><term>Eau</term><term>Facteur de croissance végétal</term><term>Feuilles de plante</term><term>Populus</term><term>Racines de plante</term><term>Sol</term><term>Transpiration des plantes</term><term>Xylème</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Soil moisture heterogeneity in the root zone is common both during the establishment of tree seedlings and in experiments aiming to impose semi-constant soil moisture deficits, but its effects on regulating plant water use compared with homogenous soil drying are not well known in trees. Pronounced vertical soil moisture heterogeneity was imposed on black poplar (Populus nigra L.) grown in soil columns by altering irrigation frequency, to test whether plant water use, hydraulic responses, root phytohormone concentrations and root xylem sap chemical composition differed between wet (well-watered, WW), and homogeneously (infrequent deficit irrigation, IDI) and heterogeneously dry soil (frequent deficit irrigation, FDI). At the same bulk soil water content, FDI plants had greater water use than IDI plants, probably because root abscisic acid (ABA) concentration was low in the upper wetter layer of FDI plants, which maintained root xylem sap ABA concentration at basal levels in contrast with IDI. Soil drying did not increase root xylem concentration of any other hormone. Nevertheless, plant-to-plant variation in xylem jasmonic acid (JA) concentration was negatively related to leaf stomatal conductance within WW and FDI plants. However, feeding detached leaves with high (1200 nM) JA concentrations via the transpiration stream decreased transpiration only marginally. Xylem pH and sulphate concentration decreased in FDI plants compared with well-watered plants. Frequent deficit irrigation increased root accumulation of the cytokinin trans-zeatin (tZ), especially in the dry lower layer, and of the ethylene precursor 1-aminocyclopropane-1-carboxylic acid (ACC), in the wet upper soil layer. Root hormone accumulation might explain the maintenance of high root hydraulic conductance and water use in FDI plants (similar to well-watered plants) compared with IDI plants. In irrigated tree crops, growers could vary irrigation scheduling to control water use by altering the hormone balance.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" IndexingMethod="Automated" Owner="NLM"><PMID Version="1">32193548</PMID><DateCompleted><Year>2020</Year><Month>10</Month><Day>01</Day></DateCompleted><DateRevised><Year>2020</Year><Month>10</Month><Day>01</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Electronic">1758-4469</ISSN><JournalIssue CitedMedium="Internet"><Volume>40</Volume><Issue>6</Issue><PubDate><Year>2020</Year><Month>05</Month><Day>30</Day></PubDate></JournalIssue><Title>Tree physiology</Title><ISOAbbreviation>Tree Physiol</ISOAbbreviation></Journal><ArticleTitle>Soil moisture heterogeneity regulates water use in Populus nigra L. by altering root and xylem sap phytohormone concentrations.</ArticleTitle><Pagination><MedlinePgn>762-773</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1093/treephys/tpaa037</ELocationID><Abstract><AbstractText>Soil moisture heterogeneity in the root zone is common both during the establishment of tree seedlings and in experiments aiming to impose semi-constant soil moisture deficits, but its effects on regulating plant water use compared with homogenous soil drying are not well known in trees. Pronounced vertical soil moisture heterogeneity was imposed on black poplar (Populus nigra L.) grown in soil columns by altering irrigation frequency, to test whether plant water use, hydraulic responses, root phytohormone concentrations and root xylem sap chemical composition differed between wet (well-watered, WW), and homogeneously (infrequent deficit irrigation, IDI) and heterogeneously dry soil (frequent deficit irrigation, FDI). At the same bulk soil water content, FDI plants had greater water use than IDI plants, probably because root abscisic acid (ABA) concentration was low in the upper wetter layer of FDI plants, which maintained root xylem sap ABA concentration at basal levels in contrast with IDI. Soil drying did not increase root xylem concentration of any other hormone. Nevertheless, plant-to-plant variation in xylem jasmonic acid (JA) concentration was negatively related to leaf stomatal conductance within WW and FDI plants. However, feeding detached leaves with high (1200 nM) JA concentrations via the transpiration stream decreased transpiration only marginally. Xylem pH and sulphate concentration decreased in FDI plants compared with well-watered plants. Frequent deficit irrigation increased root accumulation of the cytokinin trans-zeatin (tZ), especially in the dry lower layer, and of the ethylene precursor 1-aminocyclopropane-1-carboxylic acid (ACC), in the wet upper soil layer. Root hormone accumulation might explain the maintenance of high root hydraulic conductance and water use in FDI plants (similar to well-watered plants) compared with IDI plants. In irrigated tree crops, growers could vary irrigation scheduling to control water use by altering the hormone balance.</AbstractText><CopyrightInformation>© The Author(s) 2020. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permission@oup.com.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Puértolas</LastName><ForeName>Jaime</ForeName><Initials>J</Initials><AffiliationInfo><Affiliation>Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, UK.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Pardos</LastName><ForeName>Marta</ForeName><Initials>M</Initials><AffiliationInfo><Affiliation>Centro de Investigación Forestal (CIFOR), Instituto Nacional de Investigación Agraria y Alimentaria (INIA), Crta A Coruña s/n, Madrid E-28040, Spain.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>de Ollas</LastName><ForeName>Carlos</ForeName><Initials>C</Initials><AffiliationInfo><Affiliation>Departamento de Ciencias Agrarias y del Medio Natural, Universitat Jaume I, Campus Riu Sec, Castelló de la Plana E-12071, Spain.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Albacete</LastName><ForeName>Alfonso</ForeName><Initials>A</Initials><AffiliationInfo><Affiliation>Departamento de Nutrición Vegetal, Centro de Edafología y Biología Aplicada del Segura (CEBAS), Consejo Nacional de Investigaciones Científicas (CSIC), Campus Universitario de Espinardo, Espinardo, Murcia E-30100, Spain.</Affiliation></AffiliationInfo><AffiliationInfo><Affiliation>Departamento de Producción Vegetal y Agrotecnologýa, Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA), C/Mayor s/n, La Alberca, Murcia E-30150, Spain.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Dodd</LastName><ForeName>Ian C</ForeName><Initials>IC</Initials><AffiliationInfo><Affiliation>Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, UK.</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>0</RegistryNumber><NameOfSubstance UI="D010937">Plant Growth Regulators</NameOfSubstance></Chemical><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D012987">Soil</NameOfSubstance></Chemical><Chemical><RegistryNumber>059QF0KO0R</RegistryNumber><NameOfSubstance UI="D014867">Water</NameOfSubstance></Chemical><Chemical><RegistryNumber>72S9A8J5GW</RegistryNumber><NameOfSubstance UI="D000040">Abscisic Acid</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D000040" MajorTopicYN="N">Abscisic Acid</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D010937" MajorTopicYN="Y">Plant Growth Regulators</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018515" MajorTopicYN="N">Plant Leaves</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018517" MajorTopicYN="N">Plant Roots</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018526" MajorTopicYN="N">Plant Transpiration</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="Y">Populus</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D012987" MajorTopicYN="N">Soil</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014867" MajorTopicYN="N">Water</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D052584" MajorTopicYN="N">Xylem</DescriptorName></MeshHeading></MeshHeadingList><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="Y">trans-zeatin</Keyword><Keyword MajorTopicYN="Y">ABA</Keyword><Keyword MajorTopicYN="Y">ACC</Keyword><Keyword MajorTopicYN="Y">hydraulic conductance</Keyword><Keyword MajorTopicYN="Y">jasmonic acid</Keyword><Keyword MajorTopicYN="Y">salicylic acid</Keyword><Keyword MajorTopicYN="Y">stomatal conductance</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2019</Year><Month>12</Month><Day>11</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2020</Year><Month>03</Month><Day>09</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2020</Year><Month>03</Month><Day>18</Day></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2020</Year><Month>3</Month><Day>21</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2020</Year><Month>10</Month><Day>2</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2020</Year><Month>3</Month><Day>21</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">32193548</ArticleId><ArticleId IdType="pii">5809518</ArticleId><ArticleId IdType="doi">10.1093/treephys/tpaa037</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Espagne</li><li>Royaume-Uni</li></country><region><li>Communauté de Madrid</li><li>Communauté valencienne</li><li>Région de Murcie</li></region></list><tree><country name="Royaume-Uni"><noRegion><name sortKey="Puertolas, Jaime" sort="Puertolas, Jaime" uniqKey="Puertolas J" first="Jaime" last="Puértolas">Jaime Puértolas</name></noRegion><name sortKey="Dodd, Ian C" sort="Dodd, Ian C" uniqKey="Dodd I" first="Ian C" last="Dodd">Ian C. Dodd</name></country><country name="Espagne"><region name="Communauté de Madrid"><name sortKey="Pardos, Marta" sort="Pardos, Marta" uniqKey="Pardos M" first="Marta" last="Pardos">Marta Pardos</name></region><name sortKey="Albacete, Alfonso" sort="Albacete, Alfonso" uniqKey="Albacete A" first="Alfonso" last="Albacete">Alfonso Albacete</name><name sortKey="Albacete, Alfonso" sort="Albacete, Alfonso" uniqKey="Albacete A" first="Alfonso" last="Albacete">Alfonso Albacete</name><name sortKey="De Ollas, Carlos" sort="De Ollas, Carlos" uniqKey="De Ollas C" first="Carlos" last="De Ollas">Carlos De Ollas</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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