PoplarV1, Main, Exploration, bibRecord, 002223

Frost fatigue and spring recovery of xylem vessels in three diffuse-porous trees in situ.

Identifieur interne : 002223 ( Main/Exploration ); précédent : 002222; suivant : 002224

Frost fatigue and spring recovery of xylem vessels in three diffuse-porous trees in situ.

Auteurs : Karen K. Christensen-Dalsgaard [Canada] ; Melvin T. Tyree

Source :

Plant, cell & environment [ 1365-3040 ] ; 2014.

RBID : pubmed:24117494

Descripteurs français

KwdFr :
- Arbres (physiologie), Congélation (MeSH), Diffusion (MeSH), Eau (MeSH), Malus (physiologie), Populus (physiologie), Porosité (MeSH), Saisons (MeSH), Salix (physiologie), Xylème (physiologie).
MESH :
- physiologie : Arbres, Malus, Populus, Salix, Xylème.
- Congélation, Diffusion, Eau, Porosité, Saisons.

English descriptors

KwdEn :
- Diffusion (MeSH), Freezing (MeSH), Malus (physiology), Populus (physiology), Porosity (MeSH), Salix (physiology), Seasons (MeSH), Trees (physiology), Water (MeSH), Xylem (physiology).
MESH :
- chemical : Water.
- physiology : Malus, Populus, Salix, Trees, Xylem.
- Diffusion, Freezing, Porosity, Seasons.

Abstract

Frost has been shown to cause frost fatigue (reduced cavitation resistance) in branch segments in the lab. Here, we studied the change in cavitation resistance and percent loss of conductivity (PLC) from fall to spring over 2 consecutive years in three diffuse-porous species in situ. We used the cavitron technique to measure P25 , P50 and P90 (the xylem pressure causing a 25, 50 and 90% conductivity loss) and PLC and stained functioning vessels. Cavitation resistance was reduced by 64-87% (in terms of P50 ), depending on the species and year. P25 was impacted the most and P90 the least, changing the vulnerability curves from s- to r-shaped over the winter in all three species. The branches suffered an almost complete loss of conductivity, but frost fatigue did not necessarily occur concurrently with increases in PLC. In two species, there was a trade-off between conduit size and vulnerability. Spring recovery occurred by growth of new vessels, and in two species by partial refilling of embolized conduits. Although newly grown and functioning conduits appeared more vulnerable to cavitation than year-old vessels, cavitation resistance generally improved in spring, suggesting other mechanisms for partial frost fatigue repair.

DOI: 10.1111/pce.12216
PubMed: 24117494

Affiliations:

Canada

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Le document en format XML

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<author><name sortKey="Christensen Dalsgaard, Karen K" sort="Christensen Dalsgaard, Karen K" uniqKey="Christensen Dalsgaard K" first="Karen K" last="Christensen-Dalsgaard">Karen K. Christensen-Dalsgaard</name>
<affiliation wicri:level="1"><nlm:affiliation>Department of Renewable Resources, University of Alberta, 4-44 ESB, Edmonton, Alberta, T6G 2E3, Canada.</nlm:affiliation>
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<author><name sortKey="Christensen Dalsgaard, Karen K" sort="Christensen Dalsgaard, Karen K" uniqKey="Christensen Dalsgaard K" first="Karen K" last="Christensen-Dalsgaard">Karen K. Christensen-Dalsgaard</name>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Diffusion (MeSH)</term>
<term>Freezing (MeSH)</term>
<term>Malus (physiology)</term>
<term>Populus (physiology)</term>
<term>Porosity (MeSH)</term>
<term>Salix (physiology)</term>
<term>Seasons (MeSH)</term>
<term>Trees (physiology)</term>
<term>Water (MeSH)</term>
<term>Xylem (physiology)</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr"><term>Arbres (physiologie)</term>
<term>Congélation (MeSH)</term>
<term>Diffusion (MeSH)</term>
<term>Eau (MeSH)</term>
<term>Malus (physiologie)</term>
<term>Populus (physiologie)</term>
<term>Porosité (MeSH)</term>
<term>Saisons (MeSH)</term>
<term>Salix (physiologie)</term>
<term>Xylème (physiologie)</term>
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<keywords scheme="MESH" type="chemical" xml:lang="en"><term>Water</term>
</keywords>
<keywords scheme="MESH" qualifier="physiologie" xml:lang="fr"><term>Arbres</term>
<term>Malus</term>
<term>Populus</term>
<term>Salix</term>
<term>Xylème</term>
</keywords>
<keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Malus</term>
<term>Populus</term>
<term>Salix</term>
<term>Trees</term>
<term>Xylem</term>
</keywords>
<keywords scheme="MESH" xml:lang="en"><term>Diffusion</term>
<term>Freezing</term>
<term>Porosity</term>
<term>Seasons</term>
</keywords>
<keywords scheme="MESH" xml:lang="fr"><term>Congélation</term>
<term>Diffusion</term>
<term>Eau</term>
<term>Porosité</term>
<term>Saisons</term>
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<front><div type="abstract" xml:lang="en">Frost has been shown to cause frost fatigue (reduced cavitation resistance) in branch segments in the lab. Here, we studied the change in cavitation resistance and percent loss of conductivity (PLC) from fall to spring over 2 consecutive years in three diffuse-porous species in situ. We used the cavitron technique to measure P25 , P50 and P90 (the xylem pressure causing a 25, 50 and 90% conductivity loss) and PLC and stained functioning vessels. Cavitation resistance was reduced by 64-87% (in terms of P50 ), depending on the species and year. P25 was impacted the most and P90 the least, changing the vulnerability curves from s- to r-shaped over the winter in all three species. The branches suffered an almost complete loss of conductivity, but frost fatigue did not necessarily occur concurrently with increases in PLC. In two species, there was a trade-off between conduit size and vulnerability. Spring recovery occurred by growth of new vessels, and in two species by partial refilling of embolized conduits. Although newly grown and functioning conduits appeared more vulnerable to cavitation than year-old vessels, cavitation resistance generally improved in spring, suggesting other mechanisms for partial frost fatigue repair. </div>
</front>
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<Day>03</Day>
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<Month>04</Month>
<Day>02</Day>
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<Issue>5</Issue>
<PubDate><Year>2014</Year>
<Month>May</Month>
</PubDate>
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<Title>Plant, cell & environment</Title>
<ISOAbbreviation>Plant Cell Environ</ISOAbbreviation>
</Journal>
<ArticleTitle>Frost fatigue and spring recovery of xylem vessels in three diffuse-porous trees in situ.</ArticleTitle>
<Pagination><MedlinePgn>1074-85</MedlinePgn>
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<Abstract><AbstractText>Frost has been shown to cause frost fatigue (reduced cavitation resistance) in branch segments in the lab. Here, we studied the change in cavitation resistance and percent loss of conductivity (PLC) from fall to spring over 2 consecutive years in three diffuse-porous species in situ. We used the cavitron technique to measure P25 , P50 and P90 (the xylem pressure causing a 25, 50 and 90% conductivity loss) and PLC and stained functioning vessels. Cavitation resistance was reduced by 64-87% (in terms of P50 ), depending on the species and year. P25 was impacted the most and P90 the least, changing the vulnerability curves from s- to r-shaped over the winter in all three species. The branches suffered an almost complete loss of conductivity, but frost fatigue did not necessarily occur concurrently with increases in PLC. In two species, there was a trade-off between conduit size and vulnerability. Spring recovery occurred by growth of new vessels, and in two species by partial refilling of embolized conduits. Although newly grown and functioning conduits appeared more vulnerable to cavitation than year-old vessels, cavitation resistance generally improved in spring, suggesting other mechanisms for partial frost fatigue repair. </AbstractText>
<CopyrightInformation>© 2013 John Wiley & Sons Ltd.</CopyrightInformation>
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<AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Christensen-Dalsgaard</LastName>
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<Author ValidYN="Y"><LastName>Tyree</LastName>
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<MeshHeadingList><MeshHeading><DescriptorName UI="D004058" MajorTopicYN="N">Diffusion</DescriptorName>
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<MeshHeading><DescriptorName UI="D005615" MajorTopicYN="Y">Freezing</DescriptorName>
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<MeshHeading><DescriptorName UI="D014867" MajorTopicYN="N">Water</DescriptorName>
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<MeshHeading><DescriptorName UI="D052584" MajorTopicYN="N">Xylem</DescriptorName>
<QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName>
</MeshHeading>
</MeshHeadingList>
<KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">P50</Keyword>
<Keyword MajorTopicYN="N">cavitation resistance</Keyword>
<Keyword MajorTopicYN="N">conduit refilling</Keyword>
<Keyword MajorTopicYN="N">frost damage</Keyword>
<Keyword MajorTopicYN="N">plant conductance</Keyword>
<Keyword MajorTopicYN="N">vessel anatomy</Keyword>
<Keyword MajorTopicYN="N">vulnerability curve</Keyword>
<Keyword MajorTopicYN="N">winter embolism</Keyword>
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Frost fatigue and spring recovery of xylem vessels in three diffuse-porous trees in situ.

Frost fatigue and spring recovery of xylem vessels in three diffuse-porous trees in situ.

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki