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紫外光B辐射增强对小白菜膜脂质过氧化作用的影响

DOI: 10.3321/j.issn:1000-7091.1998.03.019, PP. 97-101

Keywords: 小白菜,紫外光B类黄酮,抗坏血酸,膜脂质过氧化

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Abstract:

小白菜品种矮脚黄生长在光照培养室内,在以0.0、13.0kJm-2d-1(模拟臭氧浓度下降20%时的UV-B强度)的紫外光B(UV-B280~320nm)进行4d与7d的照射处理,研究UV-B对小白菜叶片内的类黄酮和膜脂质过氧化作用的影响。研究结果表明,UV-B辐射诱导了小白菜叶片内吸收UV的类黄酮化合物的积累。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辐射显着抑制了小白菜叶片内过氧化氢酶和SOD酶的活性。同时UV-B辐射导致小白菜叶片内丙二醛的积累。UV-B辐射对以上生化指标的影响随处理时间的延长而加深。上述结果表明,UV-B辐射加深了小白菜的膜脂质过氧化作用,而吸收UV的类黄酮的积累并不能完全缓解UV-B的伤害。

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