Extremophilic yeasts from Microbotryomycetes: A new psychrophilic genus isolated from ice glaciers

DE GARCIA V.; TROCHINE ANDREA; UETAKE JUN; LIBKIND DIEGO

San Carlos de Bariloche

Simposio; 34rd International Specialized Symposium on Yeast; 2018

IPATEC

Class Microbotryomycetes (subphylum Pucciniomycotina), harbors more than 200 described yeast species with diversified morphological characters and ecological distribution. Camptobasidiaceae family, was recently considered as ?incertae sedis? in Microbotryomycetes, this family includes psychrophilic genera Camptobasidium and Glaciozyma. During different surveys in extreme cold environments from the world psychrophilic strains were isolated belonging to a new species within Camptobasidium (Camptobasidium gelus sp. nov.) and a new genus for which the name Giraudozyma gen. nov. is proposed. The species Giraudozyma psychrophilicus sp. nov. includes isolates from glacial ice from Alaska, Patagonia Argentina and Antarctica. The analysis of a draft genome for this species revealed the presence of genes encoding antifreeze proteins. The discovery of hidden diversity is essential for a better understanding of the phylogeny of Microbotryomycetes.