Mrakia arctica sp nov., a new psychrophilic yeast isolated from an ice island in the Canadian High Arctic

作者：Tsuji Masaharu^*; Tanabe Yukiko; Vincent Warwick F; Uchida Masaki

来源：Mycoscience, 2018, 59(1): 54-58.

DOI：10.1016/j.myc.2017.08.006

• Arctic yeast
• Basidiomycota
• Cystofilobasidiales
• LSU D1/D2 domain
• Taxonomy

Two strains of a psychrophilic basidiomycetous yeast species belonging to the genus Mrakia were isolated from a melt-pool mat community, on an ice island located in Disraeli Fjord, Ellesmere Island in the Canadian Arctic. Analysis of the large subunit rDNA D1/D2 domain and internal transcribed spacer region sequences indicated that these strains represent a novel species, and the name Mrakia arctica sp. nov. is proposed. This new species could grow at sub-zero temperatures and in vitamin-free media. Moreover, lipase and cellulase enzymes of M. arctica were strongly active even at -3 degrees C. These results suggest an important role for M. arctica in the biogeochemical cycle of glacial ecosystems.

• 出版日期2018-1
• 单位中国极地研究中心