Belowground inter-ramet water transport capacity in Populus euphratica, a Central Asian desert phreatophyte.
Identifieur interne : 000547 ( Main/Exploration ); précédent : 000546; suivant : 000548Belowground inter-ramet water transport capacity in Populus euphratica, a Central Asian desert phreatophyte.
Auteurs : J. Hoppe [Allemagne] ; X. Zhang [République populaire de Chine] ; F M Thomas [Allemagne]Source :
- Plant biology (Stuttgart, Germany) [ 1438-8677 ] ; 2020.
Descripteurs français
- KwdFr :
- MESH :
- métabolisme : Eau, Populus, Racines de plante.
- Chine, Climat désertique.
- Wicri :
- geographic : République populaire de Chine.
English descriptors
- KwdEn :
- MESH :
- chemical , metabolism : Water.
- geographic : China.
- metabolism : Plant Roots, Populus.
- Desert Climate.
Abstract
Populus euphratica Oliv. is a widespread phreatophytic tree species that forms riparian forests in (hyper-)arid regions of Central Asia. Its recruitment strongly relies on vegetative propagation from 'root suckers' that emerge from underground root spacers. The water transport through the spacers, although decisive for emerging ramets, has only rarely been quantified, but is crucial for the vegetative regeneration of the forests. In root spacers with different diameters collected from a mature poplar forest in northwest China, we calculated the hydraulic conductivity (kc ) from anatomical investigations on the basis of a modified Hagen-Poiseuille equation and measured it (km ) with a perfusion solution in the laboratory. The km values were compared with the water use by young and mature P. euphratica trees determined in previous studies. We obtained a significant correlation between km and kc (which, however, was higher by at least one order of magnitude). Due to the extensive occurrence of tyloses, particularly in older conduits and thicker spacers, and because the conduit area did not increase with spacer diameter, neither kc nor km increased with an increase in spacer diameter. The water supply through the spacers would be sufficient to meet the water demand even of mature trees. Our results provide a mechanistic explanation for the observed occurrence of P. euphratica clones across large areas and, provided that they are also valid for stands with larger distances to the water table, for the sustained growth and vegetative reproduction of P. euphratica stands growing at larger distances from the groundwater.
DOI: 10.1111/plb.13042
PubMed: 31507060
Affiliations:
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Zhang</name><affiliation wicri:level="1"><nlm:affiliation>Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi</wicri:regionArea><wicri:noRegion>Urumqi</wicri:noRegion></affiliation></author><author><name sortKey="Thomas, F M" sort="Thomas, F M" uniqKey="Thomas F" first="F M" last="Thomas">F M Thomas</name><affiliation wicri:level="4"><nlm:affiliation>Geobotany, Faculty of Regional and Environmental Sciences, University of Trier, Trier, Germany.</nlm:affiliation><country xml:lang="fr">Allemagne</country><wicri:regionArea>Geobotany, Faculty of Regional and Environmental Sciences, University of Trier, Trier</wicri:regionArea><wicri:noRegion>Trier</wicri:noRegion><orgName type="university">Université de Trèves</orgName><placeName><settlement type="city">Trèves (Allemagne)</settlement><region type="land" nuts="1">Rhénanie-Palatinat</region></placeName></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2020">2020</date><idno type="RBID">pubmed:31507060</idno><idno type="pmid">31507060</idno><idno type="doi">10.1111/plb.13042</idno><idno type="wicri:Area/Main/Corpus">000715</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">000715</idno><idno type="wicri:Area/Main/Curation">000715</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">000715</idno><idno type="wicri:Area/Main/Exploration">000715</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Belowground inter-ramet water transport capacity in Populus euphratica, a Central Asian desert phreatophyte.</title><author><name sortKey="Hoppe, J" sort="Hoppe, J" uniqKey="Hoppe J" first="J" last="Hoppe">J. Hoppe</name><affiliation wicri:level="4"><nlm:affiliation>Geobotany, Faculty of Regional and Environmental Sciences, University of Trier, Trier, Germany.</nlm:affiliation><country xml:lang="fr">Allemagne</country><wicri:regionArea>Geobotany, Faculty of Regional and Environmental Sciences, University of Trier, Trier</wicri:regionArea><wicri:noRegion>Trier</wicri:noRegion><orgName type="university">Université de Trèves</orgName><placeName><settlement type="city">Trèves (Allemagne)</settlement><region type="land" nuts="1">Rhénanie-Palatinat</region></placeName></affiliation></author><author><name sortKey="Zhang, X" sort="Zhang, X" uniqKey="Zhang X" first="X" last="Zhang">X. Zhang</name><affiliation wicri:level="1"><nlm:affiliation>Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi</wicri:regionArea><wicri:noRegion>Urumqi</wicri:noRegion></affiliation></author><author><name sortKey="Thomas, F M" sort="Thomas, F M" uniqKey="Thomas F" first="F M" last="Thomas">F M Thomas</name><affiliation wicri:level="4"><nlm:affiliation>Geobotany, Faculty of Regional and Environmental Sciences, University of Trier, Trier, Germany.</nlm:affiliation><country xml:lang="fr">Allemagne</country><wicri:regionArea>Geobotany, Faculty of Regional and Environmental Sciences, University of Trier, Trier</wicri:regionArea><wicri:noRegion>Trier</wicri:noRegion><orgName type="university">Université de Trèves</orgName><placeName><settlement type="city">Trèves (Allemagne)</settlement><region type="land" nuts="1">Rhénanie-Palatinat</region></placeName></affiliation></author></analytic><series><title level="j">Plant biology (Stuttgart, Germany)</title><idno type="eISSN">1438-8677</idno><imprint><date when="2020" type="published">2020</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>China (MeSH)</term><term>Desert Climate (MeSH)</term><term>Plant Roots (metabolism)</term><term>Populus (metabolism)</term><term>Water (metabolism)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Chine (MeSH)</term><term>Climat désertique (MeSH)</term><term>Eau (métabolisme)</term><term>Populus (métabolisme)</term><term>Racines de plante (métabolisme)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Water</term></keywords><keywords scheme="MESH" type="geographic" xml:lang="en"><term>China</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Plant Roots</term><term>Populus</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Eau</term><term>Populus</term><term>Racines de plante</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Desert Climate</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Chine</term><term>Climat désertique</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>République populaire de Chine</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Populus euphratica Oliv. is a widespread phreatophytic tree species that forms riparian forests in (hyper-)arid regions of Central Asia. Its recruitment strongly relies on vegetative propagation from 'root suckers' that emerge from underground root spacers. The water transport through the spacers, although decisive for emerging ramets, has only rarely been quantified, but is crucial for the vegetative regeneration of the forests. In root spacers with different diameters collected from a mature poplar forest in northwest China, we calculated the hydraulic conductivity (k<sub>c</sub> ) from anatomical investigations on the basis of a modified Hagen-Poiseuille equation and measured it (k<sub>m</sub> ) with a perfusion solution in the laboratory. The k<sub>m</sub> values were compared with the water use by young and mature P. euphratica trees determined in previous studies. We obtained a significant correlation between k<sub>m</sub> and k<sub>c</sub> (which, however, was higher by at least one order of magnitude). Due to the extensive occurrence of tyloses, particularly in older conduits and thicker spacers, and because the conduit area did not increase with spacer diameter, neither k<sub>c</sub> nor k<sub>m</sub> increased with an increase in spacer diameter. The water supply through the spacers would be sufficient to meet the water demand even of mature trees. Our results provide a mechanistic explanation for the observed occurrence of P. euphratica clones across large areas and, provided that they are also valid for stands with larger distances to the water table, for the sustained growth and vegetative reproduction of P. euphratica stands growing at larger distances from the groundwater.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" IndexingMethod="Curated" Owner="NLM"><PMID Version="1">31507060</PMID><DateCompleted><Year>2020</Year><Month>03</Month><Day>11</Day></DateCompleted><DateRevised><Year>2020</Year><Month>03</Month><Day>11</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1438-8677</ISSN><JournalIssue CitedMedium="Internet"><Volume>22</Volume><Issue>1</Issue><PubDate><Year>2020</Year><Month>Jan</Month></PubDate></JournalIssue><Title>Plant biology (Stuttgart, Germany)</Title><ISOAbbreviation>Plant Biol (Stuttg)</ISOAbbreviation></Journal><ArticleTitle>Belowground inter-ramet water transport capacity in Populus euphratica, a Central Asian desert phreatophyte.</ArticleTitle><Pagination><MedlinePgn>38-46</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1111/plb.13042</ELocationID><Abstract><AbstractText>Populus euphratica Oliv. is a widespread phreatophytic tree species that forms riparian forests in (hyper-)arid regions of Central Asia. Its recruitment strongly relies on vegetative propagation from 'root suckers' that emerge from underground root spacers. The water transport through the spacers, although decisive for emerging ramets, has only rarely been quantified, but is crucial for the vegetative regeneration of the forests. In root spacers with different diameters collected from a mature poplar forest in northwest China, we calculated the hydraulic conductivity (k<sub>c</sub> ) from anatomical investigations on the basis of a modified Hagen-Poiseuille equation and measured it (k<sub>m</sub> ) with a perfusion solution in the laboratory. The k<sub>m</sub> values were compared with the water use by young and mature P. euphratica trees determined in previous studies. We obtained a significant correlation between k<sub>m</sub> and k<sub>c</sub> (which, however, was higher by at least one order of magnitude). Due to the extensive occurrence of tyloses, particularly in older conduits and thicker spacers, and because the conduit area did not increase with spacer diameter, neither k<sub>c</sub> nor k<sub>m</sub> increased with an increase in spacer diameter. The water supply through the spacers would be sufficient to meet the water demand even of mature trees. Our results provide a mechanistic explanation for the observed occurrence of P. euphratica clones across large areas and, provided that they are also valid for stands with larger distances to the water table, for the sustained growth and vegetative reproduction of P. euphratica stands growing at larger distances from the groundwater.</AbstractText><CopyrightInformation>© 2019 The Authors. Plant Biology published by John Wiley & Sons Ltd on behalf of German Society for Plant Sciences, Royal Botanical Society of the Netherlands.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Hoppe</LastName><ForeName>J</ForeName><Initials>J</Initials><AffiliationInfo><Affiliation>Geobotany, Faculty of Regional and Environmental Sciences, University of Trier, Trier, Germany.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Zhang</LastName><ForeName>X</ForeName><Initials>X</Initials><AffiliationInfo><Affiliation>Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, China.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Thomas</LastName><ForeName>F M</ForeName><Initials>FM</Initials><Identifier Source="ORCID">https://orcid.org/0000-0003-3697-714X</Identifier><AffiliationInfo><Affiliation>Geobotany, Faculty of Regional and Environmental Sciences, University of Trier, Trier, Germany.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><GrantList CompleteYN="Y"><Grant><GrantID>01LL0918K</GrantID><Agency>German Federal Ministry of Education and Research</Agency><Country></Country></Grant></GrantList><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2019</Year><Month>09</Month><Day>27</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Plant Biol (Stuttg)</MedlineTA><NlmUniqueID>101148926</NlmUniqueID><ISSNLinking>1435-8603</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>059QF0KO0R</RegistryNumber><NameOfSubstance UI="D014867">Water</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D002681" MajorTopicYN="N" Type="Geographic">China</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D003889" MajorTopicYN="N">Desert Climate</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018517" MajorTopicYN="N">Plant Roots</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D032107" MajorTopicYN="Y">Populus</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D014867" MajorTopicYN="Y">Water</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="N">metabolism</QualifierName></MeshHeading></MeshHeadingList><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Euphrates poplar</Keyword><Keyword MajorTopicYN="N">hydraulic conductance</Keyword><Keyword MajorTopicYN="N">root anatomy</Keyword><Keyword MajorTopicYN="N">vessel</Keyword><Keyword MajorTopicYN="N">water flux</Keyword><Keyword MajorTopicYN="N">xylem</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2019</Year><Month>05</Month><Day>02</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2019</Year><Month>09</Month><Day>01</Day></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2019</Year><Month>9</Month><Day>12</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2020</Year><Month>3</Month><Day>12</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2019</Year><Month>9</Month><Day>12</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">31507060</ArticleId><ArticleId IdType="doi">10.1111/plb.13042</ArticleId></ArticleIdList><ReferenceList><Title>References</Title><Reference><Citation>Atkinson C.J., Else M.A. (2012) Hydraulic conductivity and PAT determine hierarchical resource partitioning and ramet development along Fragaria stolons. 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Hoppe</name></region><name sortKey="Thomas, F M" sort="Thomas, F M" uniqKey="Thomas F" first="F M" last="Thomas">F M Thomas</name></country><country name="République populaire de Chine"><noRegion><name sortKey="Zhang, X" sort="Zhang, X" uniqKey="Zhang X" first="X" last="Zhang">X. Zhang</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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