Pichia cellobiosa, Candida cariosilignicola, and Candida succiphila, New Species of Methanol-Assimilating Yeasts

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Abstract
In the course of a taxonomic study of methanol-assimilating yeasts, a number of isolates were obtained from various natural habitats in Japan, and from these three new species, Pichia cellobiosa, Candida cariosilignicola, and Candida succiphila, have been described. P. cellobiosa differs from the related species Pichia castillae with respect to fermentation and assimilation of sugars, biotin requirement for growth, and lower maximum temperature for growth. C. cariosilignicola differs from the related species Torulopsis apicola and Torulopsis bombicola with respect to assimilation of sugars and proton magnetic resonance spectra of cell wall mannans. C. succiphila is similar to C. cariosilignicola but differs from it with respect to fermentation and assimilation of sugars, lower maximum temperature for growth, higher deoxyribonucleic acid base composition, and proton magnetic resonance spectra of cell wall mannans. The type strains of these new species are KL 1 (=IAM 12481), KL 24 (=IAM 12484), and KL 30 (=IAM 12489), respectively. Cultures of the type strains have been deposited in the Institute of Applied Microbiology Culture Collection Center, University of Tokyo, Tokyo, Japan, and the Institute for Fermentation, Osaka, Japan.

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