1996 Volume 42 Issue 6 Pages 471-479
The type strain of Bullera hannae produces a thermolabile protease-sensitive fungicidal toxin that was specified as mycocin. This killer toxin did not act against ascomycetous, sporidiobolaceous and ustilaginaceous yeasts. Its killing pattern is restricted to tremellaceous yeasts and includes the species of Fibulobasidium, Filobasidium, Holtermannia, Sirobasidium, Trimorphomyces, and Tsuchiyaea. The members of the genera Bulleromyces, Cystofilobasidium, Mrakia, Sterigmatosporidium, and Xanthophyllomyces were insensitive to this mycocin. The anamorphic genera Bullera, Cryptococcus, Fellomyces, Kockovaella, Trichosporon, and Udeniomyces were heterogeneous in this respect. The taxonomic significance of the sensitivity to the mycocin of B. hannae is discussed.