The obligately psychrophilic yeast, Leucosporidium stokesii increased in size, produced irregular wall growth and formed atypical buds when incubated within one to three degrees above 20 °C, the maximum growth temperature. Incubation of cells anaerobically or aerobically in the presence of 2,4-dinitrophenol at the elevated temperatures prevented the development of atypical buds. An investigation of subcellular morphology revealed that the atypical bud was anucleate, did not form a septum between bud and parent cell and produced numerous cytoplasmic vesicles. On shift-down to 15 °C, the optimum growth temperature, nuclear division, migration and septum formation resumed.
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Silver, S.A., Sinclair, N.A. Temperature induced atypical morphogenesis of the obligately psychrophilic yeast, Leucosporidium stokesii. Mycopathologia 67, 59–64 (1979). https://doi.org/10.1007/BF00436243
- Elevated Temperature
- Growth Temperature
- Optimum Growth
- Maximum Growth