黒麹菌の変異に関する研究 : (第1報)紫外線変異及び変異株の形態に就て

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1. By the irradiation of ultraviolet ray at 5cm distance from a mercury lamp (λ=2537 Å) for 0.5_??_3.0 minutes, 81 mutants of Aspergillus Usamii SAKAGUCHI, IIZUKA and YAMAZAKI(1) were obtained. The survival and mutation rate curves are shown in Fig. 1 and 2. These mutants can be classified into 13 types: i.e. the blackish-brown type, the brown type, the tan type, the pigmentless type, the orange mycelium type, the purple drab type, the small heads type, the restricted type, the wet type, the sterile type, the sterile and white mycelium type, the nitrite And nitrate non-assimilative type, and the nitrite non assimilative type. 2. The colours in conidial heads of these mutants are continuously different; Chaetura Black XV (original strain)→Saccardos Umber XXIX (strains No. B-6-604)→Tawny Olive XXIX (strains No. B-1-207)→Pinkish Buff XXIX or Light Pinkish Cinnamon XXIX (strains No. B-1-407). All of them have the same morphological characters except the conidial colour as Asp. Usamii. 3. And we obtained by ultraviolet ray irradiation the mutants of tan type mutant (strains No. B-1-407). The types of them are as follows: the pigmentless type, the small heads type, the restricted type, the wet type, the sterile type, the sterile and white mycelium type and the nitrite and nitrate non-assimilative type. But every one of them has the same colour in conidial heads as the tan type mutant.
社団法人日本農芸化学会の論文