MSA - Systematics/Evolution
Dowie, Nicholas .
Phylogeography of Rhizopogon salebrosus, an Obligate Mycobiont of Pterospora andromedea, in the Rocky Mountains.
Myco-heterotrophic plants are nonphotosynthetic plants that form a tripartite relationship with an autotrophic tree host and a mutualistic fungus. While many myco-heterotrophic plants have been extensively examined, relatively few studies have investigated the biology of the fungal symbiont in this tripartite relationship. In the present study, the phylogeography of members or the Rhizopogon salebrosus species complex, which are hypogeous ectomycorrhizal associates of the myco-heterotrophic Pterospora andromedea, were investigated in the Rocky Mountains. Pterospora andromedea was found to exclusively associate with R. salebrosus. Limited nucleotide diversity and evidence for migration was observed. The data supported a north-south distribution of genotypes with the Evans Mountains of northern Colorado forming a potential barrier to gene flow. Although sampling was limited to Pinus contorta and P. ponderosa forest types, autotrophic host association may be a factor in the distribution of specific genotypes of R. salebrosus in association with P. andromedea.
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1 - University of Wyoming, Botany, 1000 E. University Ave, Laramie, Wyoming, 82070, United States
Presentation Type: Poster:Posters for Topics
Location: Event Tent/Cliff Lodge
Date: Tuesday, July 28th, 2009
Time: 5:30 PM