Inducement of Micronuclei and Nuclear Anomalies in Erythrocyte of Bufo bufo gargarizans Tadpole by Two Sulfonylurea Herbicides

This article took advantage of the micronuclei and nuclear anomalies tests to study the genetic toxicity of metsulfuron-methyl and bensulfuron methyl on erythrocytes nucleus of Bufo bufo gargarizans tadpoles.The results indicated that the two herbicides: metsulfuron-methyl and bensulfuron methyl could both result in a relatively different increase of the genetic index such as micronuclei and nuclear abnormities (P 0.05; P 0.01), and these two herbicides within different treating hours, can each make a summit of the genetic index, though these summits come in different concentrations. The experimental results also suggests that the micronuclei abnormities caused by metsulfuron-methy and bensulfuron methyl are far more less than the nuclear abnormities. However there was no significant correlation between herbicide concentrations and micronuclei or nuclear abnormities; neither between time and micronuclei or nuclear abnormities, though there is an average slight increase of these two genetic index with the time and concentrations going.