Superoxide dismutase (SOD) activity in heading stage is highest.Peroxidase (POD) activity is the highest in the grain-filling stage.Catalase (CAT) activity is the lowest in the flowering stage.

• 其中，超氧化物歧化酶(SOD)活性在抽穗期最高，过氧化物酶(POD)活性在灌浆期最高，而开花期过氧化氢酶(CAT)活性则明显低于其它时期。