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Int J Syst Evol Microbiol 58 (2008), 515-519; DOI  10.1099/ijs.0.65506-0
© 2008 International Union of Microbiological Societies

Candida phangngensis sp. nov., an anamorphic yeast species in the Yarrowia clade, isolated from water in mangrove forests in Phang-Nga Province, Thailand

Savitree Limtong1, Wichien Youngmanitchai1, Hiroko Kawasaki2,3 and Tatsuji Seki2

1 Department of Microbiology, Faculty of Science, Kasetsart University, 50 Paholyothin Road, Bangkok 10900, Thailand
2 The International Center for Biotechnology, Osaka University, 2-1 Yamada-oka, Suita-City, Osaka 565-0871, Japan
3 NITE Biological Resource Center (NBRC), Department of Biotechnology, National Institute of Technology and Evaluation, 2-5-8 Kazusakamatari, Kisarazu-City, Chiba 292-0818, Japan

Correspondence
Savitree Limtong
fscistl{at}ku.ac.th

Two yeast strains (TM2-16 and PT1-17T) were isolated by membrane filtration from samples of estuarine water collected from two mangrove forests, in Khao Lumpee-Haad Thaimueang National Park and Mu Ko Ra-Ko Prathong National Park, Phang-Nga Province, Thailand. Analysis of the D1/D2 domain of the large-subunit rDNA sequences revealed that the sequences of the two strains were identical. The closest species in terms of pairwise sequence similarity was Candida galli, but the level of nucleotide substitutions (13.2 %) was sufficient to justify the description of a separate species. Phylogenetic analysis demonstrated that the two strains occupy a basal position with respect to Yarrowia lipolytica and C. galli of the Yarrowia clade, supported by a high bootstrap value. The two strains showed identical phenotypic characteristics, including proliferation by multilateral budding, absence of ascospores and ballistoconidia and negative Diazonium blue B and urease reactions. The major ubiquinone was Q-9. On the basis of the above findings, these two strains were assigned to a single novel species of the genus Candida, for which the name Candida phangngensis sp. nov. is proposed. The type strain is PT1-17T (=BCC 21231T =NBRC 101967T =CBS 10407T).

Abbreviations: LSU, large subunit; SSU, small subunit

The GenBank/EMBL/DDBJ accession numbers for the sequences of the D1/D2 domain of the LSU rDNA of strains TM2-16 and PT1-17T are AB304771 and AB304772.






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