EFFECT OF WATER STRESS UPON SOD AND POD ACTICITY AND ISOENZYME OF CORN
Wang Zhenyi Guo Aiguang LUO Shuping(Northwestern Agricultural University)
With soil water potential reduction, the activity of SOD in the second leaves of the drought-resistant corn cultivars goes up apparently. The activity of SOD in thesecond leaves of non-drought-resistant doesn't vary much. The isoenzyme pattern of SOD had four bands in both drought-resistant and non-drought-resistant corn cultivars withous being affected under different water stress. The activity of SOD bands near the positive pole was related to the drought-resistant properties of corn cultivars. With the reduction in soil water potential, the activity of POD in the second leaves of either drought-resistant or non-drought-resistant corn cultivass may go up.In the drought-resistant corn cultivars, the isoenzyme patterns of POD have an obvious increase, thus, indicating that the difference of SOD and POD of corn cultivars response to different water stress are related to the drought-resistant properties of corn cultivars.