Value of chemosystematic data for predicting anamorph-teleomorph relationships between the genera Rhodotorula and Rhodosporidium

Abstract

SUMMARYThe anamorph-teleomorph relationships of basidiomycetous yeasts of the genera Rhodotorula and Rhodosporidium are described from the viewpoint of chemosystematics. A considerable number of strains with mating types of Rhodosporidium species were inferred in Rhodotorula strains from a comparison of chemosystematic information such as DNA base composition, quinone systems, zymograms, cellular carbohydrate composition, and DNA-relatedness, and this decisively confirmed the anamorph-teleomorph relationships indicated by cell conjugation. The usefulness of chemosystematic data for the study of anamorph-teleomorph relationships of yeasts is emphasized by these results. Correspondence to:Symbols: GC, guanine plus cytosine content in DNA; Q, quinone system; E, electrophoretic comparison of enzymes; Num, numerical comparison of enzyme patterns; DNA, DNA-relatedness; C, cell wall composition.

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“…We did not observe the sexual reproduction process or spore formation for yeast isolate S1. It is known that genus Rhodotorula is anamorphic [15,17] which supported our assumption about the strain S1 belonging to this genus. Assimilation of carbon sources.…”

“…It is worth notice that anamorph-teleomorph relationships of the considerable number of strains of the genera Rhodotorula and Rhodosporidium have been described in the scientific literature from the viewpoint of chemosystematics. For example, the red yeast species Rhodotorula rubescensis was reported as anamorph of the species Rhodosporidium toruloides, which is the synonym of Rhodotorula gracilis [15].…”