麹菌に關する研究 : (第2報)紫外線照射による醤油用麹菌の變異に就て(績)

概要

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Conidia of a selected strain of Aspergillus sojae (No. 260) were exposed to ultraviolet radiation, and random isolations were made from the colonies resulting from irradiated cells. Approximately two hundred of these were cultivated upon Czapeks agar solution. The majority of the isolates remained stable with normal appearance and similarity to cultural mutants. Eleven types of mutations were recognized. One of these resulted from restricted colony. Another was unable to utilize nitrate nitrogen-but developed normally if supplied with Koji extracts. Other mutations showed a total or partial loss of color without apparent alterations in their physiological properties. These eleven types are as follow : 1. Normal, 2. Restricted, 3. Extremely, restricted 4. Albino, 5. Olive, 6. Yellow, 7. Brown, 8. Sterile, 9. Floccose, 10. Nitratophobe, and 11. Nitrate non assimilative.
社団法人日本農芸化学会の論文