Symbioses: Plant, Animal, and Microbe Interactions
McDonald, Kelly , Pennell, Jason , Frank, Jonathan , Southworth, Darlene .
Ectomycorrhizae Associated with Cercocarpus ledifolius and Quercus garryana var. brewerii in Southern Oregon.
The goals of the study were to conduct a preliminary survey of the diversity and abundance of ectomycorrhizae associated with Cercocarpus ledifolius, and to compare these findings with the ectomycorrhizal diversity of a nearby resident, Quercus garryana var.brewerii. Throughout the process seasonal variation in ectomycorrhizal growth was observed and species that the two plants have in common were noted. The surveys took place in the Cascade Siskiyou National Monument and other mountainous sites in Southern Oregon. GIS techniques were used to map potential C.ledifolius/Q.garryana sites from which soil samples were collected in fall 2007 and spring 2008. The ectomycorrhizae were described by morphology and DNA sequencing. Ten morphotypes have been identified and the DNA sequencing has identified four species Hebeloma sp., Tomentella sp., Laccaria sp., and one in the Pyronemataceae family. This study provides valuable information regarding ectomycorrhizal diversity associated with high elevation plants such as C. ledifolius that grow in poorly developed rocky soils. This symbiotic relationship is particularly important in these types of habitats and may have implications for resource management because the introduction of C. ledifolius into degraded habitats can greatly improve soil conditions through nitrogen fixation and humus development. Furthermore, a comparison between the ectomycorrhizal communities of C. ledifolius and Q.garryana may offer insight into the possible interactions of the mycorrhizal networks of associated with different plant species.
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1 - Southern Oregon University, Biology, 1250 Siskiyou Blvd, Ashland, Or, 97520, USA
2 - Southern Oregon University, Department of Biology, 1250 Siskiyou Blvd, Ashland, Oregon, 97520-5010, USA
Presentation Type: Poster:Posters for Topics
Location: Ball Room & Party Room/SUB
Date: Monday, July 28th, 2008
Time: 12:30 PM