It was also found that 13.0 kJm -2 day -1 UV B inhibited catalase and superoxide dismutase activities and increased malondialdehyde content in the leaves of Chinese cabbage .

• 同时UV－B辐射降低小白菜叶片内抗坏血酸的含量，13.；0kJm－2d－1的UV－B辐射显著抑制了小白菜叶片内过氧化氢酶和SOD酶的活性。