M-dinitrobenzene, 2,4-dinitrotoluene, 2,6-dinitrotoluene and O-dinitrobenzene all induced micronucleus formation in vicia faba root tip cells, and the dose-effect relationships were significant.

• 引进标准剂量概念比较5种硝基芳烃化合物的致突变性,结果表明,致突变性强弱依次为2,4-二硝基甲苯>对硝基氯苯>间二硝基苯>2,6-二硝基甲苯>邻二硝基苯。