The previous studies showed that sulfur dioxide (SO_2) caused visible foliar damage such as chlorosis and necrosis, injured photosynthetic process and influenced the activities of enzymes for scavenging reactive oxygen species (ROS) in plant cells. However, concerning the genotoxic effect of SO_2 in plants, there is rather scantly information. For this reason, the Vicia root-micronucleus (MCN) assay was selected to assess for DNA aberration induced by the derivatives of SO_2, a mixture of sodium bisulfite a...