Variability of Cenococcum colonization and its ecophysiological significance for young conifers at alpine-treeline.
Identifieur interne : 003608 ( Main/Corpus ); précédent : 003607; suivant : 003609Variability of Cenococcum colonization and its ecophysiological significance for young conifers at alpine-treeline.
Auteurs : Niles Hasselquist ; Matthew J. Germino ; Terence Mcgonigle ; William K. SmithSource :
- The New phytologist [ 0028-646X ] ; 2005.
English descriptors
- KwdEn :
- MESH :
- microbiology : Abies, Picea, Plant Roots.
- physiology : Abies, Ascomycota, Mycorrhizae, Picea, Plant Roots.
- Ecosystem.
Abstract
* Plants establishing in environments that are marginal for growth could be particularly sensitive to mycorrhizal associations. We investigated ectomycorrhizal colonization and its significance for young conifers growing at, or above, their normal limits for growth, in the alpine-treeline ecotone. * Colonization of seedlings (<1 yr old) and juveniles (2- to 10-yr-old) of Picea engelmannii and Abies lasiocarpa by Cenococcum geophilum was determined in a field study, and effects of Cenococcum on Picea seedling ecophysiology were investigated in a glasshouse. * Colonization by Cenococcum was c. 20-fold greater for juveniles than seedlings, and approximately 4-fold greater adjacent compared with approximately 7 m away from trees. Juveniles of Picea were more colonized at timberline than Abies, and the opposite relationship was observed in forest. Colonization enhanced seedling water potential, but not phosphorus concentrations or photosynthesis. * These landscape and age-dependent variations in colonization correspond well with known variations in conifer physiology and establishment near timberline. Facilitation of seedling establishment by older trees at alpine-treeline may include a below-ground, mycorrhizal component that complements previously reported effects of trees on the microclimate and ecophysiology of seedlings.
DOI: 10.1111/j.1469-8137.2005.01275.x
PubMed: 15720698
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pubmed:15720698Le document en format XML
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Smith</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2005">2005</date><idno type="RBID">pubmed:15720698</idno><idno type="pmid">15720698</idno><idno type="doi">10.1111/j.1469-8137.2005.01275.x</idno><idno type="wicri:Area/Main/Corpus">003608</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">003608</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Variability of Cenococcum colonization and its ecophysiological significance for young conifers at alpine-treeline.</title><author><name sortKey="Hasselquist, Niles" sort="Hasselquist, Niles" uniqKey="Hasselquist N" first="Niles" last="Hasselquist">Niles Hasselquist</name><affiliation><nlm:affiliation>PO Box 8007, Department of Biology, Idaho State University, Pocatello, ID 83209, USA.</nlm:affiliation></affiliation></author><author><name sortKey="Germino, Matthew J" sort="Germino, Matthew J" uniqKey="Germino M" first="Matthew J" last="Germino">Matthew J. Germino</name></author><author><name sortKey="Mcgonigle, Terence" sort="Mcgonigle, Terence" uniqKey="Mcgonigle T" first="Terence" last="Mcgonigle">Terence Mcgonigle</name></author><author><name sortKey="Smith, William K" sort="Smith, William K" uniqKey="Smith W" first="William K" last="Smith">William K. Smith</name></author></analytic><series><title level="j">The New phytologist</title><idno type="ISSN">0028-646X</idno><imprint><date when="2005" type="published">2005</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Abies (microbiology)</term><term>Abies (physiology)</term><term>Ascomycota (physiology)</term><term>Ecosystem (MeSH)</term><term>Mycorrhizae (physiology)</term><term>Picea (microbiology)</term><term>Picea (physiology)</term><term>Plant Roots (microbiology)</term><term>Plant Roots (physiology)</term></keywords><keywords scheme="MESH" qualifier="microbiology" xml:lang="en"><term>Abies</term><term>Picea</term><term>Plant Roots</term></keywords><keywords scheme="MESH" qualifier="physiology" xml:lang="en"><term>Abies</term><term>Ascomycota</term><term>Mycorrhizae</term><term>Picea</term><term>Plant Roots</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Ecosystem</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">* Plants establishing in environments that are marginal for growth could be particularly sensitive to mycorrhizal associations. We investigated ectomycorrhizal colonization and its significance for young conifers growing at, or above, their normal limits for growth, in the alpine-treeline ecotone. * Colonization of seedlings (<1 yr old) and juveniles (2- to 10-yr-old) of Picea engelmannii and Abies lasiocarpa by Cenococcum geophilum was determined in a field study, and effects of Cenococcum on Picea seedling ecophysiology were investigated in a glasshouse. * Colonization by Cenococcum was c. 20-fold greater for juveniles than seedlings, and approximately 4-fold greater adjacent compared with approximately 7 m away from trees. Juveniles of Picea were more colonized at timberline than Abies, and the opposite relationship was observed in forest. Colonization enhanced seedling water potential, but not phosphorus concentrations or photosynthesis. * These landscape and age-dependent variations in colonization correspond well with known variations in conifer physiology and establishment near timberline. Facilitation of seedling establishment by older trees at alpine-treeline may include a below-ground, mycorrhizal component that complements previously reported effects of trees on the microclimate and ecophysiology of seedlings.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">15720698</PMID><DateCompleted><Year>2005</Year><Month>05</Month><Day>24</Day></DateCompleted><DateRevised><Year>2020</Year><Month>09</Month><Day>30</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0028-646X</ISSN><JournalIssue CitedMedium="Print"><Volume>165</Volume><Issue>3</Issue><PubDate><Year>2005</Year><Month>Mar</Month></PubDate></JournalIssue><Title>The New phytologist</Title><ISOAbbreviation>New Phytol</ISOAbbreviation></Journal><ArticleTitle>Variability of Cenococcum colonization and its ecophysiological significance for young conifers at alpine-treeline.</ArticleTitle><Pagination><MedlinePgn>867-73</MedlinePgn></Pagination><Abstract><AbstractText>* Plants establishing in environments that are marginal for growth could be particularly sensitive to mycorrhizal associations. We investigated ectomycorrhizal colonization and its significance for young conifers growing at, or above, their normal limits for growth, in the alpine-treeline ecotone. * Colonization of seedlings (<1 yr old) and juveniles (2- to 10-yr-old) of Picea engelmannii and Abies lasiocarpa by Cenococcum geophilum was determined in a field study, and effects of Cenococcum on Picea seedling ecophysiology were investigated in a glasshouse. * Colonization by Cenococcum was c. 20-fold greater for juveniles than seedlings, and approximately 4-fold greater adjacent compared with approximately 7 m away from trees. Juveniles of Picea were more colonized at timberline than Abies, and the opposite relationship was observed in forest. Colonization enhanced seedling water potential, but not phosphorus concentrations or photosynthesis. * These landscape and age-dependent variations in colonization correspond well with known variations in conifer physiology and establishment near timberline. Facilitation of seedling establishment by older trees at alpine-treeline may include a below-ground, mycorrhizal component that complements previously reported effects of trees on the microclimate and ecophysiology of seedlings.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Hasselquist</LastName><ForeName>Niles</ForeName><Initials>N</Initials><AffiliationInfo><Affiliation>PO Box 8007, Department of Biology, Idaho State University, Pocatello, ID 83209, USA.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Germino</LastName><ForeName>Matthew J</ForeName><Initials>MJ</Initials></Author><Author ValidYN="Y"><LastName>McGonigle</LastName><ForeName>Terence</ForeName><Initials>T</Initials></Author><Author ValidYN="Y"><LastName>Smith</LastName><ForeName>William K</ForeName><Initials>WK</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType><PublicationType UI="D013485">Research Support, Non-U.S. Gov't</PublicationType><PublicationType UI="D013486">Research Support, U.S. Gov't, Non-P.H.S.</PublicationType></PublicationTypeList></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>New Phytol</MedlineTA><NlmUniqueID>9882884</NlmUniqueID><ISSNLinking>0028-646X</ISSNLinking></MedlineJournalInfo><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D028202" MajorTopicYN="N">Abies</DescriptorName><QualifierName UI="Q000382" MajorTopicYN="N">microbiology</QualifierName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D001203" MajorTopicYN="N">Ascomycota</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D017753" MajorTopicYN="Y">Ecosystem</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D038821" MajorTopicYN="N">Mycorrhizae</DescriptorName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D028222" MajorTopicYN="N">Picea</DescriptorName><QualifierName UI="Q000382" MajorTopicYN="N">microbiology</QualifierName><QualifierName UI="Q000502" MajorTopicYN="Y">physiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D018517" MajorTopicYN="N">Plant Roots</DescriptorName><QualifierName UI="Q000382" MajorTopicYN="N">microbiology</QualifierName><QualifierName UI="Q000502" MajorTopicYN="N">physiology</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="pubmed"><Year>2005</Year><Month>2</Month><Day>22</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2005</Year><Month>5</Month><Day>25</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2005</Year><Month>2</Month><Day>22</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">15720698</ArticleId><ArticleId IdType="pii">NPH1275</ArticleId><ArticleId IdType="doi">10.1111/j.1469-8137.2005.01275.x</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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