The activaties of peroxidase,cata lase and ascorbic acid oxydose were increased affer treatment with acid precipitation and acid fog, but the peak value appeared in different pH in each kinds of enzyme.

• 酸雨和酸雾处理诱导叶片过氧化物酶、过氧化氢酶和抗坏血酸氧化酶活性增高，但不同酶的活性峰值出现在不同的处理酸度梯度上。