Journal
MYCOLOGIA
Volume 108, Issue 1, Pages 179-191Publisher
TAYLOR & FRANCIS INC
DOI: 10.3852/15-086
Keywords
molecular phylogeny; morphology; salt and heat tolerance; taxonomy
Categories
Funding
- NSFC [31322001, 31110103906]
- Fundamental Research on Science and Technology
- MOST [2014FY120100]
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This study introduces three new Gymnoascus species (Gymnoascaceae, Onygenales), G. halophilus, G. stercorarius and G. thermotolerans, isolated from sediments in Chaka Salt Lake, compost and cornfield soil, respectively, in China, based on a polyphasic characterization including morphology, physiology and molecular phylogeny. Phylogenetic relationships were assessed based on the nuclear internal transcribed spacer (ITS = ITS1 + 5.8S + ITS2) region and a combined multilocus alignment of the ITS, 18S subunit rRNA gene and 28S subunit rRNA genes. Our study identified phylogenetic and phenotypic characters that differentiated the three new species from known species in the genus. Salinity and temperature tolerance tests revealed that G. halophilus was an obligate halophile while G. stercorarius and G. thermotolerans were halotolerant and thermotolerant. A key to accepted species of Gymnoascus is provided.
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