A molecular and phylogenetic analysis of the structure and specificity of Alnus rubra ectomycorrhizal assemblages

Peter G Kennedy, Lee T. Hill

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Ectomycorrhizal (EM) assemblages associated with Alnus spp. are often distinct in composition and richness from other host plants. To examine the EM assemblage associated with A. rubra, a common tree in western coastal North America, we sampled four A. rubra forests varying in age, management history, and geographic location in Oregon, USA. From the 364 EM root tip rDNA ITS sequences, we found a total of 14 EM taxa. The five most abundant taxa, Tomentella sp. 3, Alnicola escharoides, Tomentella sp. 1, Lactarius cf. obscuratus, and Alpova diplophloeus, represented 80. % of the samples and were present at all four sites. Assemblage structure differed significantly among young managed sites and older unmanaged sites but not by geographic location. The younger managed sites had higher tree density, Frankia frequency, and soil nitrogen than older unmanaged sites. Phylogenetic analyses revealed that Alnus-associated EM congeners were not closely related, indicating the distinct nature of Alnus EM assemblages is not due to a unique co-evolutionary history.

Original languageEnglish (US)
Pages (from-to)195-204
Number of pages10
JournalFungal Ecology
Volume3
Issue number3
DOIs
StatePublished - Aug 1 2010

Fingerprint

Alnus rubra
Alnus
Tomentella
phylogenetics
Alpova
phylogeny
soil nitrogen
history
host plant
Lactarius
Frankia
root tips
host plants
nitrogen
young
analysis
soil
sampling
North America

Keywords

  • Alnus rubra
  • Assemblage structure
  • Ectomycorrhiza
  • Host specificity
  • Pacific Northwest

Cite this

A molecular and phylogenetic analysis of the structure and specificity of Alnus rubra ectomycorrhizal assemblages. / Kennedy, Peter G; Hill, Lee T.

In: Fungal Ecology, Vol. 3, No. 3, 01.08.2010, p. 195-204.

Research output: Contribution to journalArticle

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