The effect of phosphoric amide herbicide amiprophose-methyl(APM),which was used wildly in agriculture,on chromosome structure and protein composition of root meristems of wheat were studied by exposure to concentrations of 1-4 μmol/L.The results indicated that,as the concentration of APM increased the frequency of chromosomal structure variation increased.Frequencies of multipolar division cells and bridges lagging chromosome were 0.08% and 0.434% respectively when root meristems were treated with 3-4 μmol/...