Effects of lead and cadmium on seed germination, seedling growth and antioxidant enzymes activities of mustard ( Sinapis arvensis L.)

摘要

The effect of different concentrations of Cadmium nitrate (0 to 1000 μM) and lead nitrate (0 to 1500 μM) on seed germination, seedling growth and antioxidant enzymes activities of mustard (Sinapis arvensis L. ) after 10 days of incubation were investigated. The results revealed that Cd and Pb adversely influenced the seed germination. The effective of Cd and Pb concentrations causing 5.6% and 10.23% inhibition of germination of seeds respectively. The root and shoot of mustard plants were also decreased with increasing concentrations of Cd and Pb metals. When plants were treated with Pb and Cd, the activity of antioxidant enzymes such as APX, GPX and CAT were increased in shoot plants. In addition, it was observed that cadmium cased higher antioxidative activity in mustard plant than lead. Results in this study showed that at the highest concentration of heavy metals, the activity of CAT and APX activity were higher in Cd treatment than Pb treatment.