Role of superoxide dismutase in defense against SO_2 toxicity and an increase in superoxide dismutase activity with SO_2 fumigation
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概要
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The role of superoxide dismutase (SOD) in defense against SO_2 toxicity was investigated using leaves of poplar and spinach. Young poplar leaves having five times the SOD of the old leaves were more resistant to the toxicity of SO_2. Spraying spinach leaves with diethyldithiocarbamate caused a marked loss of SOD activity which resulted in a decrease in their resistance to the toxic effects of SO_2. The SOD activity in poplar leaves was increased by fumigation with 0.1 ppm SO_2, and this was more evident in young leaves than in old ones. The increased SOD activity was inhibited by cyanide. The poplar leaves having high SOD activity induced with SO_2 fumigation were more resistant to 2.0 ppm SO_2 than the control leaves. These findings suggest that SO_2 toxicity is in part due to the superoxide radical and that SOD participates in the defense mechanism against SO_2 toxicity.
- 日本植物生理学会の論文
著者
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Sugahara Kiyoshi
Division Of Environmental Biology The National Institute For Environmental Studies
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Sugahara Kiyoshi
Division Of Enviromental Biology The National Institute For Enviromental Studies
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Tanaka Kiyoshi
Division Of Environmental Biology National Institute For Environmental Studies
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Tanaka Kiyoshi
Division Of Environmental Biology The National Institute For Environmental Studies
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