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Int J Syst Evol Microbiol 58 (2008), 2977-2982; DOI  10.1099/ijs.0.2008/000836-0
© 2008 International Union of Microbiological Societies

Mrakiella cryoconiti gen. nov., sp. nov., a psychrophilic, anamorphic, basidiomycetous yeast from alpine and arctic habitats

Rosa Margesin1 and Jack W. Fell2

1 Institute of Microbiology, University of Innsbruck, Technikerstrasse 25, 6020 Innsbruck, Austria
2 Rosenstiel School of Marine and Atmospheric Science, University of Miami, Key Biscayne, FL 33149, USA

Correspondence
Rosa Margesin
rosa.margesin{at}uibk.ac.at

A novel psychrophilic basidiomycetous species is described in a new anamorphic genus as Mrakiella cryoconiti gen. nov., sp. nov.; the type strain of Mrakiella cryoconiti is strain A15T (=CBS 10834T =DSM 21094T). Two representatives were isolated from alpine glacier cryoconite and from northern Siberian sediment. Physiological and biochemical properties are similar to characteristics shared by members of the genus Mrakia, although sexual reproduction is absent. Mrakiella cryoconiti strains are psychrophilic and produce cold-active pectate lyase. Sequence analyses of the ITS and 26S rRNA D1/D2 regions indicated that these strains represent a distinct taxon within the Mrakia clade of the order Cystofilobasidiales, class Tremellomycetes and phylum Basidiomycota. On the basis of phenotypic and genotypic characteristics, Cryptococcus aquaticus (a member of the Mrakia clade) is transferred to the newly described genus as Mrakiella aquatica comb. nov.

Abbreviations: DBB, diazonium blue B; ITS, internal transcribed spacer; LSU, large subunit

The GenBank/EMBL/DDBJ accession numbers for the ITS domain and LSU rRNA gene D1/D2 domain sequences of strains A15T and AG25 are AJ866976 and AJ866977 (ITS) and AJ866978 and AJ866979 (D1/D2), respectively.






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