What happens when stems are embolized in a centrifuge? Testing the cavitron theory.
Identifieur interne : 003055 ( Main/Exploration ); précédent : 003054; suivant : 003056What happens when stems are embolized in a centrifuge? Testing the cavitron theory.
Auteurs : Jing Cai [République populaire de Chine] ; Uwe Hacke ; Shuoxin Zhang ; Melvin T. TyreeSource :
- Physiologia plantarum [ 1399-3054 ] ; 2010.
Descripteurs français
- KwdFr :
- Centrifugation (instrumentation), Eau (physiologie), Faisceau vasculaire des plantes (anatomie et histologie), Faisceau vasculaire des plantes (physiologie), Hybridation génétique (MeSH), Modèles biologiques (MeSH), Populus (anatomie et histologie), Populus (physiologie), Tiges de plante (anatomie et histologie), Tiges de plante (physiologie).
- MESH :
- anatomie et histologie : Faisceau vasculaire des plantes, Populus, Tiges de plante.
- physiologie : Centrifugation, Eau, Faisceau vasculaire des plantes, Populus, Tiges de plante.
- Hybridation génétique, Modèles biologiques.
English descriptors
- KwdEn :
- Centrifugation (instrumentation), Hybridization, Genetic (MeSH), Models, Biological (MeSH), Plant Stems (anatomy & histology), Plant Stems (physiology), Plant Vascular Bundle (anatomy & histology), Plant Vascular Bundle (physiology), Populus (anatomy & histology), Populus (physiology), Water (physiology).
- MESH :
- chemical , physiology : Water.
- anatomy & histology : Plant Stems, Plant Vascular Bundle, Populus.
- instrumentation : Centrifugation.
- physiology : Plant Stems, Plant Vascular Bundle, Populus.
- Hybridization, Genetic, Models, Biological.
Abstract
Vulnerability curves (VCs) measure the ability of vessels to retain metastable water without embolisms that lower the hydraulic conductivity of stems. The fastest method of measuring VCs is the centrifuge technique and the Cochard cavitron is a method that allows measurement of hydraulic conductivity of stems while they are spinning. This paper describes the pattern of embolism that results after spinning the stems of hybrid aspen (Populus tremula×P. tremuloides) and two hybrid cottonwoods (P38P38 P. balsamifera×P. simonii and Northwest, which is a hybrid of P. deltoides×P. balsamifera). It is recognized that the pattern of embolism induced in a centrifuge ought to differ from the pattern during natural dehydration of plants because the profiles of tension vs distance greatly differ under the two modes of inducing stress. The pattern of embolism was visualized by a staining technique and quantified by traditional measurements of percentage loss conductivity (PLC) performed on subsample segments excised from spun stems. We found a pattern of embolism approximating that expected from theory: (1) PLC near the axis of rotation exceeded the average; (2) PLC was quite high near the ends of the stems, even though tension ought to be zero; (3) large vessels cavitated before small vessels; (4) more embolism occurred near the base than near the apex of the stems. However, we could not always scale up from subsample conductivity and PLC to whole-stem conductivity. This pattern of embolism is interpreted in terms of vessel diameter and vessel length.
DOI: 10.1111/j.1399-3054.2010.01402.x
PubMed: 20663083
Affiliations:
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Testing the cavitron theory.</title><author><name sortKey="Cai, Jing" sort="Cai, Jing" uniqKey="Cai J" first="Jing" last="Cai">Jing Cai</name><affiliation wicri:level="1"><nlm:affiliation>College of Forestry, Northwest A&F University, 3 Taicheng Rd, Yangling, Shaanxi 712100, China.</nlm:affiliation><country xml:lang="fr">République populaire de Chine</country><wicri:regionArea>College of Forestry, Northwest A&F University, 3 Taicheng Rd, Yangling, Shaanxi 712100</wicri:regionArea><wicri:noRegion>Shaanxi 712100</wicri:noRegion></affiliation></author><author><name sortKey="Hacke, Uwe" sort="Hacke, Uwe" uniqKey="Hacke U" first="Uwe" last="Hacke">Uwe Hacke</name></author><author><name sortKey="Zhang, Shuoxin" sort="Zhang, Shuoxin" uniqKey="Zhang S" first="Shuoxin" last="Zhang">Shuoxin Zhang</name></author><author><name sortKey="Tyree, Melvin T" sort="Tyree, Melvin T" uniqKey="Tyree M" first="Melvin T" last="Tyree">Melvin T. 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The fastest method of measuring VCs is the centrifuge technique and the Cochard cavitron is a method that allows measurement of hydraulic conductivity of stems while they are spinning. This paper describes the pattern of embolism that results after spinning the stems of hybrid aspen (Populus tremula×P. tremuloides) and two hybrid cottonwoods (P38P38 P. balsamifera×P. simonii and Northwest, which is a hybrid of P. deltoides×P. balsamifera). It is recognized that the pattern of embolism induced in a centrifuge ought to differ from the pattern during natural dehydration of plants because the profiles of tension vs distance greatly differ under the two modes of inducing stress. The pattern of embolism was visualized by a staining technique and quantified by traditional measurements of percentage loss conductivity (PLC) performed on subsample segments excised from spun stems. We found a pattern of embolism approximating that expected from theory: (1) PLC near the axis of rotation exceeded the average; (2) PLC was quite high near the ends of the stems, even though tension ought to be zero; (3) large vessels cavitated before small vessels; (4) more embolism occurred near the base than near the apex of the stems. However, we could not always scale up from subsample conductivity and PLC to whole-stem conductivity. This pattern of embolism is interpreted in terms of vessel diameter and vessel length.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">20663083</PMID><DateCompleted><Year>2011</Year><Month>06</Month><Day>06</Day></DateCompleted><DateRevised><Year>2013</Year><Month>11</Month><Day>21</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Electronic">1399-3054</ISSN><JournalIssue CitedMedium="Internet"><Volume>140</Volume><Issue>4</Issue><PubDate><Year>2010</Year><Month>Dec</Month></PubDate></JournalIssue><Title>Physiologia plantarum</Title><ISOAbbreviation>Physiol Plant</ISOAbbreviation></Journal><ArticleTitle>What happens when stems are embolized in a centrifuge? Testing the cavitron theory.</ArticleTitle><Pagination><MedlinePgn>311-20</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1111/j.1399-3054.2010.01402.x</ELocationID><Abstract><AbstractText>Vulnerability curves (VCs) measure the ability of vessels to retain metastable water without embolisms that lower the hydraulic conductivity of stems. The fastest method of measuring VCs is the centrifuge technique and the Cochard cavitron is a method that allows measurement of hydraulic conductivity of stems while they are spinning. This paper describes the pattern of embolism that results after spinning the stems of hybrid aspen (Populus tremula×P. tremuloides) and two hybrid cottonwoods (P38P38 P. balsamifera×P. simonii and Northwest, which is a hybrid of P. deltoides×P. balsamifera). It is recognized that the pattern of embolism induced in a centrifuge ought to differ from the pattern during natural dehydration of plants because the profiles of tension vs distance greatly differ under the two modes of inducing stress. The pattern of embolism was visualized by a staining technique and quantified by traditional measurements of percentage loss conductivity (PLC) performed on subsample segments excised from spun stems. We found a pattern of embolism approximating that expected from theory: (1) PLC near the axis of rotation exceeded the average; (2) PLC was quite high near the ends of the stems, even though tension ought to be zero; (3) large vessels cavitated before small vessels; (4) more embolism occurred near the base than near the apex of the stems. However, we could not always scale up from subsample conductivity and PLC to whole-stem conductivity. This pattern of embolism is interpreted in terms of vessel diameter and vessel length.</AbstractText><CopyrightInformation>Copyright © Physiologia Plantarum 2010.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Cai</LastName><ForeName>Jing</ForeName><Initials>J</Initials><AffiliationInfo><Affiliation>College of Forestry, Northwest A&F University, 3 Taicheng Rd, Yangling, Shaanxi 712100, China.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Hacke</LastName><ForeName>Uwe</ForeName><Initials>U</Initials></Author><Author ValidYN="Y"><LastName>Zhang</LastName><ForeName>Shuoxin</ForeName><Initials>S</Initials></Author><Author ValidYN="Y"><LastName>Tyree</LastName><ForeName>Melvin 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></Article><MedlineJournalInfo><Country>Denmark</Country><MedlineTA>Physiol Plant</MedlineTA><NlmUniqueID>1256322</NlmUniqueID><ISSNLinking>0031-9317</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>059QF0KO0R</RegistryNumber><NameOfSubstance UI="D014867">Water</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D002498" MajorTopicYN="N">Centrifugation</DescriptorName><QualifierName UI="Q000295" MajorTopicYN="Y">instrumentation</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D006824" MajorTopicYN="N">Hybridization, Genetic</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D008954" MajorTopicYN="Y">Models, Biological</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D018547" MajorTopicYN="N">Plant Stems</DescriptorName><QualifierName UI="Q000033" MajorTopicYN="N">anatomy & histology</QualifierName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D058526" MajorTopicYN="N">Plant Vascular Bundle</DescriptorName><QualifierName UI="Q000033" MajorTopicYN="N">anatomy & histology</QualifierName><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="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D014867" MajorTopicYN="N">Water</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="entrez"><Year>2010</Year><Month>7</Month><Day>29</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2010</Year><Month>7</Month><Day>29</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2011</Year><Month>6</Month><Day>7</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">20663083</ArticleId><ArticleId IdType="pii">PPL1402</ArticleId><ArticleId IdType="doi">10.1111/j.1399-3054.2010.01402.x</ArticleId></ArticleIdList></PubmedData></pubmed><affiliations><list><country><li>République populaire de Chine</li></country></list><tree><noCountry><name sortKey="Hacke, Uwe" sort="Hacke, Uwe" uniqKey="Hacke U" first="Uwe" last="Hacke">Uwe Hacke</name><name sortKey="Tyree, Melvin T" sort="Tyree, Melvin T" uniqKey="Tyree M" first="Melvin T" last="Tyree">Melvin T. Tyree</name><name sortKey="Zhang, Shuoxin" sort="Zhang, Shuoxin" uniqKey="Zhang S" first="Shuoxin" last="Zhang">Shuoxin Zhang</name></noCountry><country name="République populaire de Chine"><noRegion><name sortKey="Cai, Jing" sort="Cai, Jing" uniqKey="Cai J" first="Jing" last="Cai">Jing Cai</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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