Abstract：In order to study the effects of selenite and selenate on growth and physiological characteristics of brassica ( Brassica oleracea L.) , cabbage seeds were treated with 6 concentrations ( 0, 50, 100, 150, 200, 300 mg/L) of selenate and selenite, and their germination rate, germination potential, root length, seedling height, fresh weight, dry weight, peroxidase ( POD) activity and catalase ( CAT) activity were measured. The results showed that selenate concentration higher than 100 mg/L and selenite concentration higher than 50 mg/L inhibited seed germination rate and germination potential; selenate and selenite with concentration higher than 100 mg/L significantly inhibited seedling height, root length, fresh weight and dry weight ( P < 0. 05) . After the treatment with selenate at 50 mg/L, the peroxidase activity and catalase activity significantly increased compared with control ( P < 0. 05) . With the increase of selenate concentration, the peroxidase activity remained relatively high. The activities of catalase fluctuated at different concentrations of selenate and selenite. The activities of catalase reached maximum, with the treatment of selenite at the concentration of 300 mg/L and selenite at the concentration of 150 mg/L, respectively.
2018, Vol. 31 
