麹菌の自然變異に關する研究

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書誌事項

タイトル別名
  • Studies on the Natural Variation of Koji-molds (<i>Asp. oryzae</i> and <i>Asp. sojae</i>)
  • コウジキン ノ シゼン ヘンイ ニ カンスル ケンキュウ 2 コウジキン ノ ヘンイ ノ サイボウガクテキ ケンキュウ
  • Part 2. Cytological Studies on the Natural Variation of Koji-molds
  • (第2報)麹菌の變異の細胞學的研究
公開日
1952
DOI
  • 10.1271/nogeikagaku1924.26.85
公開者
公益社団法人 日本農芸化学会

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説明

1. The constant strains of the Koji molds, S- or F-types, form conidia with comparatively uniform sizes; i, e. S=3_??_5μ and F=4_??_6μ. The inconstant strains, on the contrary, produce conidia rich in variety of sizes, including those with unordinarily large diameters (3_??_10μ or more).<br> 2. The conidia of the constant strains have been found to contain 1_??_4 nuclei, the majority containing two nuclei. The conidia of the inconstant strains, however, are exceedingly multinucleate (8_??_20 or more) and large in diameters as shown in the Plate.<br> 3. In the constant strains, one nucleus moves into conidium from apex of the sterigmata at the beginning of the conidium formation, and divides at once into 2_??_4 through probable mitotic divisions. While in the inconstant or variable strains, more than 2 conidia migrate from sterigmata into newly formed conidium. Those conidia become multinucleate (8_??_20 or more) promptly through repeated divisions of nuclei.<br> 4. As to the migration of ndclei from vesicle, which is conspicuously multinucleate, into sterigmata, the authors have recognized that in the constant strains always only one nucleus migrates into sterigmata while in the inconstant strains at least 2_??_4 simultaneously, the sterigmata becoming much more long and broad consequently.<br> 5. From the facts above shown it might be assumed that the variability of the inconstant strains of the Koji molds chiefly depends upon the multinucleate property of the conidia.

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