Perithecial formation in Gelasinospora reticulispora III. Inhibitory effects of near-UV and blue light during the inductive dark period

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Growing hyphae of Gelasinospora reticulispora required a continuous dark period prior to photoinduction of perithecia. The inductive dark period was interrupted by brief exposure of the hyphae to white light so that the formation of perithecia no longer took place. Photosensitivity of the hyphae in terms of the light-break effect gradually changed during the inductive dark period. Sensitivity reached its maximum at the 18th hr of the dark period when an irradiation of 1 × 10^5 ergs cm^<-2> of near-UV light or 4 × 10^4 ergs cm^<-2> of blue light was sufficient for the light-break. Red and far-red light had no effect at all. The light-break effect was limited to the irradiated portion of the hyphae and did not affect any unirradiated portions. Inhibitory effect on perithecial formation of continuous white light could be totally replaced for several days with inter-mittent irradiations of near-UV or blue light if given for 5 min every 4 hr.
日本植物生理学会の論文