THE LACTOSE ASSIMILATING SPECIES IN THE GENUS RHODOTORULA

Abstract

One hundred and sixty-three strains of Rhodotorula were isolated from the air of dairies and cowsheds in Osaka Prefecture. Many of them were identified as Rhodotorula glutinis and less were as Rht. Rubra. Besides these strains, one new lactose assimilating Rhodotorula was found. It was proposed to name this microorganism Rhodotorula lactosa sp. nov. In regard to the new yeast and the six known lactose utilizing Rhodotorula, a comparison was made on morphological and physiological properties, as well as the vitamin requirement.