Effect of Flooding Stress on Antioxidant Enzyme System of Grassleaf Sweetflag Rhizome
淹水胁迫对石菖蒲抗氧化酶系统的影响

Grassleaf sweetflag rhizome was used to study the effect of flooding stress on plant antioxidant enzyme system(SOD,POD,CAT) and malondialdehyde (MDA).The experimental result showed that in the initial stage, half-submerged plants SOD reduced.7 days later, SOD ascended first and then descended. CAT and MDA showed ascending first and then descending. POD kept elevating all the time. All submerged plants SOD showed similar trends to half-submerged plants, but SOD activity didn,t descend in the late stage, POD, CAT and MDA kept elevating and significantly higher than control.It presented that under flooding condition, grassleaf sweetflag rhizome could regulate its stress resistance through antioxidant enzyme system, and it showed stronger anti-submergence ability under half-submerged environment. So, emerged plants can be cultivated in wetland to enhance its anti-submergence ability