期刊
MYCOLOGIA
卷 105, 期 6, 页码 1524-1534出版社
TAYLOR & FRANCIS INC
DOI: 10.3852/12-336
关键词
Basidiomycota; ecophysiology; Polyporaceae; polypore
类别
资金
- Highlands Biological Station
- Mycological Society of America for the CT Rogerson Research Award
- National Science Foundation [DBI-0847868]
- Direct For Biological Sciences
- Div Of Biological Infrastructure [0847868] Funding Source: National Science Foundation
The wood-decay fungi Fomes fasciatus and F. fomentarius share many morphological characters that historically have made species delimitation challenging. We examined morphological, molecular and physiological characters of basidiomata and pure cultures of F. fasciatus and F. fomentarius sampled from multiple plant hosts and geographic regions in the United States to determine whether they support separation of the two species. We find that mean basidiospore size is significantly larger in F. fomentarius and represents the most informative morphological character for delineating the species. Basidiomata and pore-surface shape provided additional resolution of the species, but these characters often overlap and are more variable than basidiospore size. Phylogenetic analyses of ITS and RPB2 sequences suggest that F. fasciatus and F. fomentarius represent distinct evolutionary lineages. The two species share less than 88% maximum identity for the ITS region Limited intraspecific sequence variation at each locus also was observed. In vitro experiments of hyphal-growth response to a wide range of temperatures support differences in physiology between the two species.
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