| A plant regulator named Z-S synthesized by our department was sprinkled on leaves of upland rice during three-leaf and one sprout stage,jointing stage and booting stage with different concentrations,respectively.The results showed: with sprinkling of 100 mg/kg Z-S,the root activity,SOD and CAT activities,soluble protein content were obviously higher than that with other treatments,soluble protein content of flag leaf increased obviously,but SOD and CAT activities increased not obviously in comparison with other treatments.Sprinkling with high Z-S concentration(≥300 mg/kg) resulted in MDA accumulation in plant and premature senility.Sprinkling with 100 mg/kg Z-S increased yield and economic coefficient of upland rice significantly (P<0.01). |