イネいもち病菌の分生胞子形成に関する研究 : II. 分生胞子形成の各段階に及ぼす光の影響

概要

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The sporulation process of rice blast fungus, Pyricularia oryzae Cavara, was devided into two phases of the conidiophore formation and the spore production. The conidiophore formation greatly depended on irradiation. Under the continuous light, the conidiophore formation proceeded nomally, but under the continuous darkness, the aerial hypha instead of the conidiophore was produced. It was apparent that the irradiation was essential for the conidiorhore formation. The spore production also depended on irradiation. The spore production proceeded normally under irradiation, but it was repressed remarkably under darkness. The dedifferentiation from conidiophore to aerial hyphae was not observed under darkness, but the spore production proceeded slowly and some abnormalities at spore production appeared. The delayed period of spore production under darkness was affected by the period of irradiation just before the darkness treatment. The repression of sporulation under darkness was eliminated by re-irradiation, and the sporulation proceeded again. When intermittently irradiated at an interval of 6 hr, the sporulation proceeded during the irradiation period, and was repressed during the dark period. On the other hand, in the same treatment at an interval of 12 hr, the repression of sporulation during the dark period was obscure.
日本植物病理学会の論文
1977-04-25