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Abstract Detail

Poster Session

Trappe, Matthew J. [1], Smith, Matthew E. [2], Hobbie, Erik [3].

Exploring the phylogenetic affiliations and the trophic mode of Sedecula pulvinata (Sedeculaceae).

Sedecula is a monotypic genus of hypogeous fungi that is rare and endemic to dry conifer forests of the western United States.  The only known species, Sedecula pulvinata, was described in 1941 and its taxonomic placement and trophic status have remained uncertain ever since.  Here we employ isotopic and molecular phylogenetic analyses to determine its nutritional mode and placement on the fungal tree of life.  Phylogenetic analysis indicates that S. pulvinata is closely related to the genus Coniophora (Coniophoraceae, Boletales).  Stable isotope comparisons with known ectomycorrhizal and saprotrophic fungi together with phylogenetic evidence also suggest that S. pulvinata is a saprobe and that this genus represents a unique morphological transition from a resupinate basiocarp morphology (in Coniophora and relatives) to a hypogeous, sequestrate basiocarp morphology (in Sedecula).

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1 - Oregon State University, Forest Ecosystems and Society, Corvallis, Oregon, 97331, United States
2 - University of Florida, Plant Pathology, 2517 Fifield Hall, Gainesville, Florida, 32611, United States
3 - University of New Hampshire, Earth Systems Research Center, Durham, NH, 03824, USA

sequestrate fungi
isotopic analysis

Presentation Type: Offered Paper - Poster
Session: P5
Location: Lincoln Room/Kellogg Hotel and Conference Center
Date: Monday, June 9th, 2014
Time: 8:00 PM
Number: P5003
Abstract ID:30
Candidate for Awards:None

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