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以４个栽培稻品种和２种野生稻为材料，比较了长期生长在高浓度ＣＯ２（６００ｕＬ／Ｌ）和普通空气ＣＯ２浓度（３５０ｕＬ／Ｌ）下抽穗期水稻叶片抗氧化酶活性的变化以及对甲基紫精光氧化的响应。在自然条件下其抗氧化酶（ＳＯＤ、ＣＡＴ和ＰＯＤ）活性因品种和种性的不同而存在一定的差异。与生长在普通空气ＣＯ２浓度的水稻相比，高浓度ＣＯ２下叶片的膜脂过氧化产物ＭＤＡ含量和ＰＯＤ活性都有不同程度下降，ＳＯＤ和ＣＡＴ活性则因品种的不同而呈不同的变化趋势。光氧化条件下，生长在普通空气ＣＯ２浓度下的水稻叶片ＣＡＴ活性增加了１．７～６．５倍，高浓度ＣＯ２下则增加了１．０～３．８倍，而ＳＯＤ和ＰＯＤ活性在光氧化条件下都降低。光氧化导致了水稻叶片的ＭＤＡ含量的增加，高浓度ＣＯ２下生长的水稻叶片ＭＤＡ含量增加的幅度小于在普通空气ＣＯ２浓度下生长的水稻，显示高浓度ＣＯ２对光氧化损伤具防护效应。
Four cultivars and two wild rice cultivars were used as materials to compare the changes of antioxidant enzyme activities in leaves of rice cultivated at high concentrations of CO2 (600uL / L) and normal air (350uL / L) Response of Methyl Violet Photosoxidation. Under natural conditions, its antioxidant enzymes (SOD, CAT and POD) activity due to the different species and species there are some differences. Compared with rice grown in normal air CO2 concentration, MDA content and POD activity of membrane lipid peroxidation products in high CO2 concentration decreased to different extents, while SOD and CAT activity varied in different varieties. Under photooxidation conditions, CAT activity increased by 1.7-6.5 folds in rice leaves and 1.0-3.8 folds at high CO2 concentrations, while SOD and POD activities increased Photooxidation conditions are reduced. Photooxidation led to an increase of MDA content in rice leaves. MDA content of rice leaves grown under high CO2 concentration was less than that of rice grown under normal atmospheric CO2 concentration, indicating that CO2 with high concentration had a protective effect on photooxidation damage.