Radiation-induced Biochemical Changes in the Larvae of Housefly, Musca dolnestica

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Radiation-induced changes in the third instar larvae of Musca domestica were investigated. Pupariation delay was evident in the irradiated larvae. Both 5 and 10kR exerted similar pupariation delays. At biochemical level, glycogen seems to show an enhancement in the irradiated larvae as compared to control. Free sugars register initial rise followed by decline in the irradiated larvae. Total ninhydrin positive compounds showed a similar trend as free sugars. The irradiated larvae exhibited a delayed increase in protein content as compared to control. There was no significant change in ribosidic compounds due to irradiation. These results are discussed in the light of the likely targets of radiation at the cellular level. The use of ionizing radiation as a source to enhance the mutation frequency was recognized as early as 1930. This has been exploited in controlling insect pests widely and the evident example is the eradication of screw-worm by releasing radiationsterilised males. Similar approach is also being tried to control Aedes, Musca, Mediterranean fruit fly, etc. Irradiation of insect larvae may lead to a number of responses in addition to simple lethality. These include delay in pupation, melanization of larval body, developmental abnormalities in the adult, death during pupal stage or failure of emergence and imaginal death soon after eclosion. Developing stages of insects show drastic variations in their sensitivity to radiation. However, little information is available on the biochemical alterations that lead to manifestation of physiological effects caused by irradiation in the developing insects.
日本放射線影響学会の論文

Radiation-induced Biochemical Changes in the Larvae of Housefly, Musca dolnestica

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