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Cystobasidiomycetes yeasts from Patagonia (Argentina): description of Rhodotorula meli sp. nov. from glacial meltwater

¹ INIBIOMA;
² Universidade Nova de Lisboa

³ E-mail: diego.libkind{at}gmail.com

The basidiomycetous yeast strain CRUB 1032, which formed salmon-pink colonies, was isolated from glacial meltwater in Patagonia, Argentina. Morphological, physiological and biochemical characterization indicated that this strain belonged to the genus Rhodotorula. Molecular taxonomic analysis based on the 26S rDNA D1/D2 domain and internal transcribed spacer (ITS) region sequences showed that CRUB 1032 represents an undescribed yeast species, for which the name Rhodotorula meli sp. nov. is here proposed (type strain: CBS 10797T=JCM 15319T). Phylogenetic analysis showed that R. lamellibrachii is the closest known species, together with which R. meli forms a separate cluster related to the Sakaguchia clade, within the Cystobasidiomycetes. Additional Patagonian yeast isolates of the Cystobasidiomycetes are also investigated in the present work.