Environmental and genetic effects on the formation of ectomycorrhizal and arbuscular mycorrhizal associations in cottonwoods.
Identifieur interne : 003E24 ( Main/Exploration ); précédent : 003E23; suivant : 003E25Environmental and genetic effects on the formation of ectomycorrhizal and arbuscular mycorrhizal associations in cottonwoods.
Auteurs : Catherine A. Gehring [États-Unis] ; Rebecca C. Mueller ; Thomas G. WhithamSource :
- Oecologia [ 0029-8549 ] ; 2006.
Descripteurs français
- KwdFr :
- MESH :
- analyse : Azote, Carbone, Eau, Sol.
- croissance et développement : Mycorhizes.
- génétique : Populus.
- microbiologie : Populus.
- Altitude, Hybridation génétique, Polymorphisme de restriction, Symbiose, Utah.
English descriptors
- KwdEn :
- MESH :
- chemical , analysis : Carbon, Nitrogen, Soil, Water.
- genetics : Populus.
- growth & development : Mycorrhizae.
- microbiology : Populus.
- Altitude, Hybridization, Genetic, Polymorphism, Restriction Fragment Length, Symbiosis, Utah.
Abstract
Although both environment and genetics have been shown to affect the mycorrhizal colonization of host plants, the impacts of these factors on hosts that can be dually colonized by both ectomycorrhizal (EM) and arbuscular mycorrhizal (AM) fungi are less understood. We examined the influence of environment and host crosstype on the EM and AM colonization of cottonwoods (Populus angustifolia and natural hybrids) by comparing levels of colonization of trees growing in common gardens that differed in elevation and soil type. We also conducted a supplemental watering experiment to determine the influence of soil moisture on AM and EM colonization. Three patterns emerged. First, garden location had a significant impact on mycorrhizal colonization, such that EM colonization was 30% higher and AM colonization was 85% lower in the higher elevation garden than the lower elevation garden. Second, crosstype affected total (EM + AM) colonization, but did not affect EM or AM colonization. Similarly, a significant garden x crosstype interaction was found for total colonization, but not for EM or AM colonization. Third, experimental watering resulted in 33% higher EM colonization and 45% lower AM colonization, demonstrating that soil moisture was a major driver of the mycorrhizal differences observed between the gardens. We conclude that environment, particularly soil moisture, has a larger influence on colonization by AM versus EM fungi than host genetics, and suggest that environmental stress may be a major determinant of mycorrhizal colonization in dually colonized host plants.
DOI: 10.1007/s00442-006-0437-9
PubMed: 16642319
Affiliations:
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Gehring</name><affiliation wicri:level="2"><nlm:affiliation>Department of Biological Sciences, Merriam-Powell Center for Environmental Research, Northern Arizona University, Flagstaff, AZ 86011-5640, USA. catherine.gehring@nau.edu</nlm:affiliation><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Biological Sciences, Merriam-Powell Center for Environmental Research, Northern Arizona University, Flagstaff, AZ 86011-5640</wicri:regionArea><placeName><region type="state">Arizona</region></placeName></affiliation></author><author><name sortKey="Mueller, Rebecca C" sort="Mueller, Rebecca C" uniqKey="Mueller R" first="Rebecca C" last="Mueller">Rebecca C. Mueller</name></author><author><name sortKey="Whitham, Thomas G" sort="Whitham, Thomas G" uniqKey="Whitham T" first="Thomas G" last="Whitham">Thomas G. 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We examined the influence of environment and host crosstype on the EM and AM colonization of cottonwoods (Populus angustifolia and natural hybrids) by comparing levels of colonization of trees growing in common gardens that differed in elevation and soil type. We also conducted a supplemental watering experiment to determine the influence of soil moisture on AM and EM colonization. Three patterns emerged. First, garden location had a significant impact on mycorrhizal colonization, such that EM colonization was 30% higher and AM colonization was 85% lower in the higher elevation garden than the lower elevation garden. Second, crosstype affected total (EM + AM) colonization, but did not affect EM or AM colonization. Similarly, a significant garden x crosstype interaction was found for total colonization, but not for EM or AM colonization. Third, experimental watering resulted in 33% higher EM colonization and 45% lower AM colonization, demonstrating that soil moisture was a major driver of the mycorrhizal differences observed between the gardens. We conclude that environment, particularly soil moisture, has a larger influence on colonization by AM versus EM fungi than host genetics, and suggest that environmental stress may be a major determinant of mycorrhizal colonization in dually colonized host plants.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">16642319</PMID><DateCompleted><Year>2006</Year><Month>11</Month><Day>20</Day></DateCompleted><DateRevised><Year>2018</Year><Month>11</Month><Day>13</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Print">0029-8549</ISSN><JournalIssue CitedMedium="Print"><Volume>149</Volume><Issue>1</Issue><PubDate><Year>2006</Year><Month>Aug</Month></PubDate></JournalIssue><Title>Oecologia</Title><ISOAbbreviation>Oecologia</ISOAbbreviation></Journal><ArticleTitle>Environmental and genetic effects on the formation of ectomycorrhizal and arbuscular mycorrhizal associations in cottonwoods.</ArticleTitle><Pagination><MedlinePgn>158-64</MedlinePgn></Pagination><Abstract><AbstractText>Although both environment and genetics have been shown to affect the mycorrhizal colonization of host plants, the impacts of these factors on hosts that can be dually colonized by both ectomycorrhizal (EM) and arbuscular mycorrhizal (AM) fungi are less understood. We examined the influence of environment and host crosstype on the EM and AM colonization of cottonwoods (Populus angustifolia and natural hybrids) by comparing levels of colonization of trees growing in common gardens that differed in elevation and soil type. We also conducted a supplemental watering experiment to determine the influence of soil moisture on AM and EM colonization. Three patterns emerged. First, garden location had a significant impact on mycorrhizal colonization, such that EM colonization was 30% higher and AM colonization was 85% lower in the higher elevation garden than the lower elevation garden. Second, crosstype affected total (EM + AM) colonization, but did not affect EM or AM colonization. Similarly, a significant garden x crosstype interaction was found for total colonization, but not for EM or AM colonization. Third, experimental watering resulted in 33% higher EM colonization and 45% lower AM colonization, demonstrating that soil moisture was a major driver of the mycorrhizal differences observed between the gardens. We conclude that environment, particularly soil moisture, has a larger influence on colonization by AM versus EM fungi than host genetics, and suggest that environmental stress may be a major determinant of mycorrhizal colonization in dually colonized host plants.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Gehring</LastName><ForeName>Catherine A</ForeName><Initials>CA</Initials><AffiliationInfo><Affiliation>Department of Biological Sciences, Merriam-Powell Center for Environmental Research, Northern Arizona University, Flagstaff, AZ 86011-5640, USA. catherine.gehring@nau.edu</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Mueller</LastName><ForeName>Rebecca C</ForeName><Initials>RC</Initials></Author><Author ValidYN="Y"><LastName>Whitham</LastName><ForeName>Thomas G</ForeName><Initials>TG</Initials></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D003160">Comparative 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UI="D032107" MajorTopicYN="N">Populus</DescriptorName><QualifierName UI="Q000235" MajorTopicYN="N">genetics</QualifierName><QualifierName UI="Q000382" MajorTopicYN="Y">microbiology</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D012987" MajorTopicYN="N">Soil</DescriptorName><QualifierName UI="Q000032" MajorTopicYN="Y">analysis</QualifierName></MeshHeading><MeshHeading><DescriptorName UI="D013559" MajorTopicYN="Y">Symbiosis</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014589" MajorTopicYN="N">Utah</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014867" MajorTopicYN="N">Water</DescriptorName><QualifierName UI="Q000032" MajorTopicYN="N">analysis</QualifierName></MeshHeading></MeshHeadingList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2005</Year><Month>09</Month><Day>08</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2006</Year><Month>04</Month><Day>03</Day></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2006</Year><Month>4</Month><Day>28</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2006</Year><Month>12</Month><Day>9</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2006</Year><Month>4</Month><Day>28</Day><Hour>9</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">16642319</ArticleId><ArticleId IdType="doi">10.1007/s00442-006-0437-9</ArticleId></ArticleIdList><ReferenceList><Reference><Citation>Oecologia. 2004 Jul;140(2):234-40</Citation><ArticleIdList><ArticleId IdType="pubmed">15148601</ArticleId></ArticleIdList></Reference><Reference><Citation>Mycorrhiza. 2004 Oct;14(5):283-93</Citation><ArticleIdList><ArticleId IdType="pubmed">14530929</ArticleId></ArticleIdList></Reference><Reference><Citation>Genetics. 1989 Nov;123(3):557-65</Citation><ArticleIdList><ArticleId IdType="pubmed">2574697</ArticleId></ArticleIdList></Reference><Reference><Citation>Mycorrhiza. 2005 Mar;15(2):87-91</Citation><ArticleIdList><ArticleId IdType="pubmed">15015061</ArticleId></ArticleIdList></Reference><Reference><Citation>Evolution. 2005 Jan;59(1):61-9</Citation><ArticleIdList><ArticleId IdType="pubmed">15792227</ArticleId></ArticleIdList></Reference><Reference><Citation>Evolution. 2001 Jul;55(7):1325-35</Citation><ArticleIdList><ArticleId IdType="pubmed">11525457</ArticleId></ArticleIdList></Reference></ReferenceList></PubmedData></pubmed><affiliations><list><country><li>États-Unis</li></country><region><li>Arizona</li></region></list><tree><noCountry><name sortKey="Mueller, Rebecca C" sort="Mueller, Rebecca C" uniqKey="Mueller R" first="Rebecca C" last="Mueller">Rebecca C. Mueller</name><name sortKey="Whitham, Thomas G" sort="Whitham, Thomas G" uniqKey="Whitham T" first="Thomas G" last="Whitham">Thomas G. Whitham</name></noCountry><country name="États-Unis"><region name="Arizona"><name sortKey="Gehring, Catherine A" sort="Gehring, Catherine A" uniqKey="Gehring C" first="Catherine A" last="Gehring">Catherine A. Gehring</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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