VITAMIN REQUIREMENT AS A TAXONOMIC KEY FOR RHODOTORULA SP.

Abstract

Using several strains of Rhodotorula, the stability of the requirement of thiamine and para-aminobenzoic acid was reexamined. Each of the tested organisms had been maintained on two different media. Besides, the tests were performed in comparison between two methods of incubation. It was found that the degree of requirement for thiamine and for its two pyrimidine and thiazole moieties considerably varied with cultural conditions, while that of para-aminobenzoic acid by some strains did not vary with conditions of preservation and incubation, indicating its essentiality in accordance with the previous results. Discussions were made on the taxonomic significance of the vitamin requirement for the genus Rhodotorula.