The Journal of General and Applied Microbiology
Online ISSN : 1349-8037
Print ISSN : 0022-1260
ISSN-L : 0022-1260
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Wickerhamomyces tratensis sp. nov. and Candida namnaoensis sp. nov., two novel ascomycetous yeast species in the Wickerhamomyces clade found in Thailand
Takashi NakaseSasitorn JindamorakotSomjit Am-InShinya NinomiyaHiroko Kawasaki
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2012 Volume 58 Issue 2 Pages 145-152


Two closely related yeast strains, ST-382 and ST-392, isolated in Thailand showed intermediate relatedness in the DNA-DNA hybridization experiment suggesting that the two strains represent closely related distinct species. In the tree based on the D1/D2 domain sequences of the large subunit rRNA gene, the two strains are located in a subclade in the Wickerhamomyces clade with high bootstrap support. In the D1/D2 domain, the two strains differed by two nucleotides and are assumed to be very closely related. Strain ST-392T (=BCC 15102T = NBRC 107799T = CBS 12176T) forming hat-shaped ascospores is described as Wickerhamomyces tratensis sp. nov. and strain ST-382T (= BCC 15093T = NBRC 107800T = CBS 12175T) is described as Candida namnaoensis sp. nov. because ascospores are not found in this strain. In phenotypic characteristics, W. tratensis and C. namnaoensis are discriminated by the ability of alcoholic fermentation and the assimilation of galactose, D-xylose and D-gluconic acid.

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© 2012 by The Applied Microbiology, Molecular and Cellular Biosciences Research Foundation
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