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ESR analysis of a photo-activated insectsicide and its effects on superoxide dismutase, peroxidase and catalase activity in Culex pipiens pallens



ESR analysis of a photo-activated insectsicide and its effects on superoxide dismutase, peroxidase and catalase activity in Culex pipiens pallens



Acta Entomologica Sinica 46(1): 22-26



Preliminary effects of alpha-terthienyl (alpha-T), a typical photo-activated insecticide, on active oxygen radicals and endogenous enzyme activity in the protective enzyme system of 4th instar Culex pipiens pallens larvae were studied by ESR analysis. The results indicated that both near ultraviolet radiation and alpha-T could enhance the amount of active oxygen radicals in 4th instar larvae of C. pipiens pollens, and the effect of alpha-T could also be increased by exposure to near ultraviolet radiation. The activity of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) in vivo could be inhibited by alpha-T, maximal inhibition occurring after larvae had been exposed to near ultraviolet radiation for 3 hours, although the effects of such radiation and alpha-T on endogenous enzyme activity in the protective enzyme system varied between different enzymes.

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Accession: 010505163

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