摘要
从实验室熏气和野外大气暴露两方面研究了SO_2对蚕豆叶片内抗氧化剂水平的影响。熏气实验表明,低浓度的SO_2(0.1和0.05 ug/g)暴露能使超氧化物歧化酶(SOD)和过氧化物酶(POD)活性升高,而使抗坏血酸含量下降。野外大气暴露实验结果表明大气硫酸盐化速率与SOD活性呈极显著正线性相关(P<O.01),与POD活性也存在一定的线性相关(P<0.05),而与抗坏血酸含量呈极显著的负线性相关(P<0.01)。
The role of antioxidants, which are thought to scavenge the oxygen-free radicals in plants, was studied with the treatment of SO2 under experimental and field condition. Increase in superoxide dismutase (SOD) and peroxidase (POD) activity, and decrease in ascorbic acid content were observed when fumigated with low concentration of SO2(0. 1, 0. 05 μg/g). Ambient air exposing experiments indicated that the rate of sulfatization in the air had a significant positive linear relation with SOD activity ( P < 0 . 01) and POD activity ( P < 0. 05) , and a negative linear relation with ascorbic acid content (P<0. 01).
出处
《植物资源与环境》
CSCD
1993年第1期45-48,共4页
Journal of Plant Resources and Environment
关键词
二氧化硫
抗氧化剂
蚕豆
sulfur dioxide
antioxidants
Viria faba L.
