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Int J Syst Evol Microbiol 55 (2005), 1365-1368; DOI  10.1099/ijs.0.63441-0
© 2005 International Union of Microbiological Societies

Cryptococcus taeanensis sp. nov., a new anamorphic basidiomycetous yeast isolated from a salt farm

Kee-Sun Shin1, Yong-Ha Park1, Dong-Jin Park2 and Chang-Jin Kim2

1 Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology, Yusong, Daejeon, 305-333, Republic of Korea
2 Division of Drug Discovery, Korea Research Institute of Bioscience and Biotechnology, Yusong, Daejeon, 305-333, Republic of Korea

Correspondence
Chang-Jin Kim
changjin{at}kribb.re.kr

Cryptococcus taeanensis, a new anamorphic yeast species originating from a salt farm on the Taean peninsula in Korea, is described. Strain 3-12T grew by budding, contained ubiquinone Q-10 and xylose in cell hydrolysates, utilized D-glucuronate and did not ferment D-glucose. A molecular phylogenetic analysis based on the large-subunit rRNA D1/D2 domain and ITS region sequences placed C. taeanensis near Auriculibuller fuscus and Bullera japonica, recently proposed taxa of the Tremellales. However, these species were distinguishable based on standard physiological tests used for yeast identification, with characteristics including the assimilation of L-sorbose, absence of ballistoconidia, no arbutin hydrolysis and no growth in the presence of 0·01 % cycloheximide. The isolate exhibited the typical physiology of the genus Cryptococcus Vuillemin, but its large-subunit rRNA D1/D2 domain sequence was clearly distinct from previously described species in the genus. Therefore, on the basis of these results, Cryptococcus taeanensis sp. nov. is proposed; the type strain is 3-12T (=KCTC 17149T=CBS 9742T).

The GenBank/EMBL/DDBJ accession numbers for the 26S rRNA D1/D2 domain and ITS region sequences of Cryptococcus taeanensis 3-12T are AY422719 and AY686645, respectively.

A phylogenetic tree based on analysis of ITS region (including 5·8S rRNA gene) sequences showing the position of C. taeanensis 3-12T in relation to taxa of the Tremellales is available in IJSEM Online.






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Copyright © 2005 by the International Union of Microbiological Societies.