MRI links stem water content to stem diameter variations in transpiring trees.
Identifieur interne : 000025 ( PubMed/Checkpoint ); précédent : 000024; suivant : 000026MRI links stem water content to stem diameter variations in transpiring trees.
Auteurs : Veerle De Schepper [Belgique] ; Dagmar Van Dusschoten ; Paul Copini ; Siegfried Jahnke ; Kathy SteppeSource :
- Journal of experimental botany [ 1460-2431 ] ; 2012.
English descriptors
- KwdEn :
- MESH :
- chemical , metabolism : Water.
- chemistry : Plant Stems, Quercus.
- growth & development : Plant Stems, Quercus.
- physiology : Plant Stems, Quercus.
- Magnetic Resonance Imaging, Plant Transpiration.
Abstract
In trees, stem diameter variations are related to changes in stem water content, because internally stored water is depleted and replenished over a day. To confirm this relationship, non-invasive magnetic resonance imaging (MRI) was combined with point dendrometer measurements in three actively transpiring oak (Quercus robur L.) trees. Two of these oak trees were girdled to study the stem increment above the girdling zone. MRI images and micrographs of stem cross-sections revealed a close link between the water distribution and the anatomical features of the stem. Stem tissues with the highest amount of water were physiologically the most active ones, being the youngest differentiating xylem cells, the cambium and the youngest differentiating and conductive phloem cells. Daily changes in stem diameter corresponded well with the simultaneously MRI-measured amount of water, confirming their strong interdependence. MRI images also revealed that the amount of water in the elastic bark tissues, excluding cambium and the youngest phloem, contributed most to the daily stem diameter changes. After bark removal, an additional increase in stem diameter was measured above the girdle. This increase was attributed not only to the cambial production of new cells, but also to swelling of existing bark cells. In conclusion, the comparison of MRI and dendrometer measurements confirmed previous interpretations and applications of dendrometers and illustrates the additional and complementary information MRI can reveal regarding water relations in plants.
DOI: 10.1093/jxb/err445
PubMed: 22268159
Affiliations:
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Veerle.DeSchepper@UGent.be</nlm:affiliation><country xml:lang="fr">Belgique</country><wicri:regionArea>Laboratory of Plant Ecology, Department of Applied Ecology and Environmental Biology, Faculty of Bioscience Engineering, Ghent University, 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="Van Dusschoten, Dagmar" sort="Van Dusschoten, Dagmar" uniqKey="Van Dusschoten D" first="Dagmar" last="Van Dusschoten">Dagmar Van Dusschoten</name></author><author><name sortKey="Copini, Paul" sort="Copini, Paul" uniqKey="Copini P" first="Paul" last="Copini">Paul Copini</name></author><author><name sortKey="Jahnke, Siegfried" sort="Jahnke, Siegfried" uniqKey="Jahnke S" first="Siegfried" last="Jahnke">Siegfried Jahnke</name></author><author><name sortKey="Steppe, Kathy" sort="Steppe, Kathy" uniqKey="Steppe K" first="Kathy" last="Steppe">Kathy Steppe</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2012">2012</date><idno type="RBID">pubmed:22268159</idno><idno type="pmid">22268159</idno><idno type="doi">10.1093/jxb/err445</idno><idno type="wicri:Area/PubMed/Corpus">000026</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">000026</idno><idno type="wicri:Area/PubMed/Curation">000026</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Curation">000026</idno><idno type="wicri:Area/PubMed/Checkpoint">000026</idno><idno type="wicri:explorRef" wicri:stream="Checkpoint" wicri:step="PubMed">000026</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">MRI links stem water content to stem diameter variations in transpiring trees.</title><author><name sortKey="De Schepper, Veerle" sort="De Schepper, Veerle" uniqKey="De Schepper V" first="Veerle" last="De Schepper">Veerle De Schepper</name><affiliation wicri:level="4"><nlm:affiliation>Laboratory of Plant Ecology, Department of Applied Ecology and Environmental Biology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium. Veerle.DeSchepper@UGent.be</nlm:affiliation><country xml:lang="fr">Belgique</country><wicri:regionArea>Laboratory of Plant Ecology, Department of Applied Ecology and Environmental Biology, Faculty of Bioscience Engineering, Ghent University, 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="Van Dusschoten, Dagmar" sort="Van Dusschoten, Dagmar" uniqKey="Van Dusschoten D" first="Dagmar" last="Van Dusschoten">Dagmar Van Dusschoten</name></author><author><name sortKey="Copini, Paul" sort="Copini, Paul" uniqKey="Copini P" first="Paul" last="Copini">Paul Copini</name></author><author><name sortKey="Jahnke, Siegfried" sort="Jahnke, Siegfried" uniqKey="Jahnke S" first="Siegfried" last="Jahnke">Siegfried Jahnke</name></author><author><name sortKey="Steppe, Kathy" sort="Steppe, Kathy" uniqKey="Steppe K" first="Kathy" last="Steppe">Kathy Steppe</name></author></analytic><series><title level="j">Journal of experimental botany</title><idno type="eISSN">1460-2431</idno><imprint><date when="2012" type="published">2012</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Magnetic Resonance Imaging</term><term>Plant Stems (chemistry)</term><term>Plant Stems (growth & development)</term><term>Plant Stems (physiology)</term><term>Plant Transpiration</term><term>Quercus (chemistry)</term><term>Quercus (growth & development)</term><term>Quercus (physiology)</term><term>Water (metabolism)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Water</term></keywords><keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Plant Stems</term><term>Quercus</term></keywords><keywords scheme="MESH" qualifier="growth & development" xml:lang="en"><term>Plant Stems</term><term>Quercus</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Plant Stems</term><term>Quercus</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Magnetic Resonance Imaging</term><term>Plant Transpiration</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">In trees, stem diameter variations are related to changes in stem water content, because internally stored water is depleted and replenished over a day. To confirm this relationship, non-invasive magnetic resonance imaging (MRI) was combined with point dendrometer measurements in three actively transpiring oak (Quercus robur L.) trees. Two of these oak trees were girdled to study the stem increment above the girdling zone. MRI images and micrographs of stem cross-sections revealed a close link between the water distribution and the anatomical features of the stem. Stem tissues with the highest amount of water were physiologically the most active ones, being the youngest differentiating xylem cells, the cambium and the youngest differentiating and conductive phloem cells. Daily changes in stem diameter corresponded well with the simultaneously MRI-measured amount of water, confirming their strong interdependence. MRI images also revealed that the amount of water in the elastic bark tissues, excluding cambium and the youngest phloem, contributed most to the daily stem diameter changes. After bark removal, an additional increase in stem diameter was measured above the girdle. This increase was attributed not only to the cambial production of new cells, but also to swelling of existing bark cells. In conclusion, the comparison of MRI and dendrometer measurements confirmed previous interpretations and applications of dendrometers and illustrates the additional and complementary information MRI can reveal regarding water relations in plants.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">22268159</PMID><DateCreated><Year>2012</Year><Month>05</Month><Day>08</Day></DateCreated><DateCompleted><Year>2012</Year><Month>09</Month><Day>04</Day></DateCompleted><DateRevised><Year>2013</Year><Month>11</Month><Day>21</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1460-2431</ISSN><JournalIssue CitedMedium="Internet"><Volume>63</Volume><Issue>7</Issue><PubDate><Year>2012</Year><Month>Apr</Month></PubDate></JournalIssue><Title>Journal of experimental botany</Title><ISOAbbreviation>J. Exp. Bot.</ISOAbbreviation></Journal><ArticleTitle>MRI links stem water content to stem diameter variations in transpiring trees.</ArticleTitle><Pagination><MedlinePgn>2645-53</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1093/jxb/err445</ELocationID><Abstract><AbstractText>In trees, stem diameter variations are related to changes in stem water content, because internally stored water is depleted and replenished over a day. To confirm this relationship, non-invasive magnetic resonance imaging (MRI) was combined with point dendrometer measurements in three actively transpiring oak (Quercus robur L.) trees. Two of these oak trees were girdled to study the stem increment above the girdling zone. MRI images and micrographs of stem cross-sections revealed a close link between the water distribution and the anatomical features of the stem. Stem tissues with the highest amount of water were physiologically the most active ones, being the youngest differentiating xylem cells, the cambium and the youngest differentiating and conductive phloem cells. Daily changes in stem diameter corresponded well with the simultaneously MRI-measured amount of water, confirming their strong interdependence. MRI images also revealed that the amount of water in the elastic bark tissues, excluding cambium and the youngest phloem, contributed most to the daily stem diameter changes. After bark removal, an additional increase in stem diameter was measured above the girdle. This increase was attributed not only to the cambial production of new cells, but also to swelling of existing bark cells. In conclusion, the comparison of MRI and dendrometer measurements confirmed previous interpretations and applications of dendrometers and illustrates the additional and complementary information MRI can reveal regarding water relations in plants.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>De Schepper</LastName><ForeName>Veerle</ForeName><Initials>V</Initials><AffiliationInfo><Affiliation>Laboratory of Plant Ecology, Department of Applied Ecology and Environmental Biology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium. Veerle.DeSchepper@UGent.be</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>van Dusschoten</LastName><ForeName>Dagmar</ForeName><Initials>D</Initials></Author><Author ValidYN="Y"><LastName>Copini</LastName><ForeName>Paul</ForeName><Initials>P</Initials></Author><Author ValidYN="Y"><LastName>Jahnke</LastName><ForeName>Siegfried</ForeName><Initials>S</Initials></Author><Author ValidYN="Y"><LastName>Steppe</LastName><ForeName>Kathy</ForeName><Initials>K</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 DateType="Electronic"><Year>2012</Year><Month>01</Month><Day>20</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>J Exp Bot</MedlineTA><NlmUniqueID>9882906</NlmUniqueID><ISSNLinking>0022-0957</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>059QF0KO0R</RegistryNumber><NameOfSubstance UI="D014867">Water</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D008279" MajorTopicYN="N">Magnetic Resonance Imaging</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018547" MajorTopicYN="N">Plant Stems</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="N">chemistry</QualifierName><QualifierName UI="Q000254" MajorTopicYN="Y">growth & development</QualifierName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018526" MajorTopicYN="Y">Plant Transpiration</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D029963" MajorTopicYN="N">Quercus</DescriptorName><QualifierName UI="Q000737" MajorTopicYN="Y">chemistry</QualifierName><QualifierName UI="Q000254" MajorTopicYN="N">growth & development</QualifierName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D014867" MajorTopicYN="N">Water</DescriptorName><QualifierName UI="Q000378" MajorTopicYN="Y">metabolism</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2012</Year><Month>1</Month><Day>24</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2012</Year><Month>1</Month><Day>24</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2012</Year><Month>9</Month><Day>5</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">22268159</ArticleId><ArticleId IdType="pii">err445</ArticleId><ArticleId IdType="doi">10.1093/jxb/err445</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>Belgique</li></country><region><li>Province de Flandre-Orientale</li><li>Région flamande</li></region><settlement><li>Gand</li></settlement><orgName><li>Université de Gand</li></orgName></list><tree><noCountry><name sortKey="Copini, Paul" sort="Copini, Paul" uniqKey="Copini P" first="Paul" last="Copini">Paul Copini</name><name sortKey="Jahnke, Siegfried" sort="Jahnke, Siegfried" uniqKey="Jahnke S" first="Siegfried" last="Jahnke">Siegfried Jahnke</name><name sortKey="Steppe, Kathy" sort="Steppe, Kathy" uniqKey="Steppe K" first="Kathy" last="Steppe">Kathy Steppe</name><name sortKey="Van Dusschoten, Dagmar" sort="Van Dusschoten, Dagmar" uniqKey="Van Dusschoten D" first="Dagmar" last="Van Dusschoten">Dagmar Van Dusschoten</name></noCountry><country name="Belgique"><region name="Région flamande"><name sortKey="De Schepper, Veerle" sort="De Schepper, Veerle" uniqKey="De Schepper V" first="Veerle" last="De Schepper">Veerle De Schepper</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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