Physiological effects of zinc sulphate on maize seed germination

Using the summer maize hybrids Zhengdan958 and Nongda108 as the experimental materials, the effects of ZnSO4 on the germination of maize aging seed and some physiological characteristics were analyzed. The results showed that suitable Zn2+ concentration significantly increased the germination potential, seed vigor and dry weight of seedling per plant of maize. It also enhanced the activity of POD, CAT, dehydrogenase and the content of soluble sugar and soluble protein, but declined the content of MDA. The optimal Zn2+concentration differed with maize hybrids. The proper concentrations for Zhengdan958 and Nongda108 were 0.4 g/L and 0.8 g/L under our experiment conditions, respectively. The results suggested that ZnSO4 treatment accelerated seed germination, enhanced antioxidation level, mitigated lipid peroxidation and improved substance metabolism of germinating seeds.