Mycocinogenic yeasts isolated from Amazon soils of the Maraca Ecological Station, Roraima-Brazil

The 240 yeasts isolated from soils of the Maraca Ecological Station in the Brazilian Amazon were identified and screened for mycocin production. These strains included 82% of ascomycetous and 18% basidiomicetous affinities and the prevalent species were Candida etchellsii, Candida famata, Candida robusta, Candida rugosa, Candida valida, Debaryomyces hansenii, Cryptococcus albidus, Cryptococcus laurentii, Rhodotorula glutinis, Rhodotorula minuta and Rhodotorula mucilaginosa. Mycocins able to kill some yeasts were produced by 6 strains identified as Issatchenkia sp., Saccharomyces exigus?, Williopsis saturnus, var. subsufficiens, and 3 W saturnus according to 26S rDNA D1/D2 region sequence and phenotypic data.