BULLERA VARIABILIS, A NEW SPECIES OF YEAST WITH UNIQUELY-SHAPED BALLISTOSPORES ISOLATED FROM VARIOUS PLANT MATERIALS

摘要

Seventeen strains of ballistosporous yeasts isolated from various plant materials in Japan and Canada were found to represent an undescribed species. The ballistospores of these yeasts are variously shaped. Some of them are turbinate, ampulliform, or chestnut-shaped with a hilum on the deflected position, while others are polygonal such as trigonal, tetragonal, pentagonal, rhomboid, etc. The biochemical and physiological characteristics of these yeasts place them in the genus Bullera. The electrophoretic pattern of enzymes differs from strain to strain, which suggests that these yeasts constitute several different species. However, no distinct groups were distinguished based on enzyme patterns or other taxonomic characteristics. We group these yeasts in a single species from the practical point of view. The name Bullera variabilis Nakase et Suzuki is given to this species.