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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Ref ID : 6087

E. Fischer, M. Lovas, and L. Molnar; The effect of Benzimidazole, Carbamate and Organophosphorous pesticides on the oxygen-dependent nuclear volume alterations in the chloragocytes of Tubifex tubifex Mull. Environ.Pollut.A 28:285-289, 1982

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The effects of benomyl, carbofuran, carbaryl, malathion and trichlorfon on the oxygen-dependent nuclear volume alterations in the chloragocytes of T. tubifex were examined karyometrically and compared with those of specific metabolic inhibitors. Under aerated conditions all the pesticides used induced nuclear swelling within the physiological range. Under hypoxic conditions benomyl, a benzimidazole compound, and the organophosphorous insecticides, malathion and trichlorfon, induced significant hyperphysiological nuclear swelling. This effect was not produced by the carbamate insecticides, carbofuran and carbaryl. From other studies and our previous results concerning the effects of anabolic inhibitors in this test, we suggest that hyperphysiological nuclear swelling induced by the benzimidazole and organophosphorous pesticides may be a response to the chemical damage of nuclear function.