Antioxidant Enzyme Activity Differences of Dendrobium officinale Kimura et Migo Seedlings in Different Parts

The antioxidant enzymes SOD,POD,CAT activity of roots,stems,leaves parts of Dendrobium officinale Kimura et Migo seedlings were analysed. The results showed that the size of SOD activity of Dendrobium officinale Kimura et Migo seedlings root,stem and leaf parts followed by stem >root>leaf,POD activity size followed by root>stem >leaf,and CAT activity size followed by leaf>root>stem. Antioxidant activity of different enzymes in different parts were different. The key enzyme in root and stem growth process played antioxidant may be SOD and POD,but the leaves of the growth process in the antioxidant enzymes may be CAT.