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

• Published in: Journal of Zhejiang University SCIENCE B
• Main Authors: Xin, Ming-xiu, Zhou, Pei-jin
• Format: Text
• Language: English
• Published: Zhejiang University Press 2007
• Subjects: Biotechnology; Antarctic; Fildes; Fildes peninsula; Antarc*; Antarctica
• Online Access: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1838835; http://www.ncbi.nlm.nih.gov/pubmed/17444601; https://doi.org/10.1631/jzus.2007.B0260

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.