センチニクバエの変態に対する放射線の影響第I報

概要

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When larvae were irradiated with 0.5 to 50 kR, they were not killed in the larval stage and progressed to prepupae. Irradiation in the larval and the young prepupal stage caused death in the early pupal stage (early death). In this case, disturbance in exchange of the hypodermis was observed. When pupae were irradiated at 20 hours of age or later, they developed further but could not emerge because of general suppression of differentiation (late death). Radiosensitivity, when determined by the emergence rate, scarecely altered during the period from second instar larva to second day papa and thereafter it dropped off gradually. The most radiosensitive stage was 30-50 hours of age in the pupal period, and the fully-grown 7th day papa was about 56 times as radioresistant as that of first day pupa. The change in DNA symthesis rate showed good correlation with the change of radiosenditivity through pupal stage except for the late pupal stage. The following findings were obtained as the results of the partial body irradiation of first day pupa. Irradiation except for the abdomen had equivalent effect to total body irradiation, and the irradiation of the head had the greatest effect.
社団法人日本動物学会の論文
1966-07-15