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ZJUS-B
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology)  2007, Vol. 8 Issue (4): 260-265    DOI: 10.1631/jzus.2007.B0260
Biotechnology     
Mrakia psychrophila sp. nov., a new species isolated from Antarctic soil
XIN Ming-xiu, ZHOU Pei-jin
College of Life Sciences, Beijing Normal University, Beijing 100875, China; Institute of Microbiology, Academia Sinica, Beijing 100080, China
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Abstract  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 °C and 18 °C, 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 Q8. All results indicated that Y18 belongs to the genes of Mrakia. The 18S rDNA sequence analyses showed that Y18 is closely related to Mrakia frigida. DNA-DNA relatedness study, and some biochemistry characteristics indicated that Y18 represents a new species for which Mrakia psychrophila sp. nov. is proposed.

Key words： Proton exchange membrane fuel cell (PEMFC)      Artificial neural network (ANN)      Hybrid model      Physical model     
Received: 19 October 2006     
CLC:  Q939  
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XIN Ming-xiu
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Cite this article:

XIN Ming-xiu, ZHOU Pei-jin. Mrakia psychrophila sp. nov., a new species isolated from Antarctic soil. Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology), 2007, 8(4): 260-265.

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http://www.zjujournals.com/xueshu/zjus-b/10.1631/jzus.2007.B0260     OR     http://www.zjujournals.com/xueshu/zjus-b/Y2007/V8/I4/260

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