Abstract:

The content MDA and H2O2, the activity of SOD and CAT in the leaf of Zhengmai 9023 (drought-vulnerable wheat variety) and Changwu134 (drought – resistant wheat variety) which applied by difference quantity nitrogenous manure have investigated under field. The result showed that the drought-resistance relate to the leaf protectase activity and cell membrane superoxide significantly, moreover, mediated by nitrogen manure. The drought-resistant wheat variety has the higher protectase activity than drought-vulnerable wheat variety and lower MDA and H2O2 content; the dynamics of MDA and H2O2 content is reduced firstly and than increased as applied nitrogen manure quantity increased, it is contrary to protectase.