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

摘要/Abstract

摘要： 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。

关键词: 小白菜, 紫外光B类黄酮, 抗坏血酸, 膜脂质过氧化

Abstract: Chinese cabbage cultivar Aijiaohuang was grown in an indoor experiment treated by 0.0,13.0(simulating 20% ozone depletion)kJ m -2 day -1 of ultraviolet B(UV B)for 4 and 7 days to study the effect of supplemental UV B radiation on flavoniods and lipid peroxidation in the leaves of Chinese cabbage.Accumulation of UV absorbing flavonoids in the leaves of Chinese cabbage was induced by UV B radiation.Enhanced UV B radiation reduced ascorbic acid content in the leaves of Chinese cabbage .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 .These effects induced by UV B radiation was enhanced with the time course of treatment.The results above suggested that supplemental UV B radiation enhanced lipid peroxidation of Chinese cabbage,and the accumulation of UV absorbing flavonoid could not alleviate the damage of UV B radiation.

Key words: Chinese cabbage, Ultraviolet B, Flavonoids, Ascorbic acid, Lipid Peroxidation

中图分类号:

S634.9

黄少白，章静娟，刘晓忠，戴秋杰，王志霞. 紫外光B辐射增强对小白菜膜脂质过氧化作用的影响[J]. 华北农学报, 1998, 13(3): 97-101. doi: 10.3321/j.issn:1000-7091.1998.03.019.

Huang Shaobai， Zhang Jingjuan， Liu Xiaozhong， Dai Qiujie， Wang Zhixia. Influence of Supplemental Ultraviolet B Radiation on Lipid Peroxidation of Chinese Cabbage[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1998, 13(3): 97-101. doi: 10.3321/j.issn:1000-7091.1998.03.019.

http://www.hbnxb.net/CN/Y1998/V13/I3/97

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