Mrakia psychrophila sp. nov., a new species isolated from Antarctic soil

The yeast strain （Y18） was isolated from a soil sample collected from Fildes Peninsula, Antarctica. The strain is a psychrophilic yeast with optimum and maximum growth temperatures of 10 ℃ and 18 ℃, respectively. Teliospores were formed after 7 d on malt agar, when the germination of teliospores was...

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Bibliographic Details
Published in:Journal of Zhejiang University. B. Science 2007-04, Vol.8 (4), p.260-265
Main Authors: Xin, Ming-xiu, Zhou, Pei-jin
Format: Article
Language:English
Subjects:
18SrDNA序列
Antarctic Regions
Basidiomycota - classification
Basidiomycota - genetics
Biotechnology
China
DNA, Fungal - genetics
Phylogeny
Soil Microbiology
冬孢子
南极土壤
嗜冷酵母
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Summary:The yeast strain （Y18） was isolated from a soil sample collected from Fildes Peninsula, Antarctica. The strain is a psychrophilic yeast with optimum and maximum growth temperatures of 10 ℃ and 18 ℃, respectively. Teliospores were formed after 7 d on malt agar, when the germination of teliospores was observed. Both inositol and D-glucuronate were assimilated. Positive results of the DBB （diazonium blue B） color reaction, urease test, and starch formation were observed. The major CoQ is Qs. All results indicated that Y18 belongs to the genes of Mrakia. The 18S rDNA sequence analyses showed that Y18 is closely related to Mrakiafrigida. DNA-DNA relatedness study, and some biochemistry characteristics indicated that Y18 represents a new species for which Mrakia psychrophila sp. nov. is proposed.
ISSN:1673-1581
1862-1783
DOI:10.1631/jzus.2007.B0260