以中黄24大豆种子为材料，采用酶活性测定技术，初步研究了二氧化硫处理对大豆幼苗叶片细胞过氧化氢酶(CAT)、过氧化物酶(POD)、超氧化物歧化酶(SOD)的影响。结果表明，用60 mg/m3 SO₂熏气处理2 h后，大豆幼苗叶片细胞CAT活性先降低，后又逐渐恢复；POD和SOD的活性在SO₂熏气处理后升高。说明60 mg/m3 SO₂熏气处理对大豆幼苗细胞抗氧化酶活性的影响不同，这可能与大豆对SO₂的抗性有关。

Using Zhonghuang 24 soybean seeds as materials， the effects of SO₂ treatment on the activities of antioxidant enzymes， especially CAT， POD and SOD in the leaves of soybean seedlings were elementary studied using assay of enzyme activities. The results showed that CAT activity of soybean seedling leaf cells first decreased， and then recovered gradually after fumigation with a concentration of 60 mg/m3 SO₂ for 2 hours. The activity of POD and SOD increased after SO₂ fumigation. It was suggested that 60 mg/m3 SO₂ fumigation had different effects on antioxidant enzyme activity in soybean seedling cells， which might be related to SO₂ resistance of soybean.

S565.1