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感染丛枝病的泡桐叶片、枝条和根韧皮部的超氧物歧化酶活性总是低于健康植株，而过氧化物酶活性则相反；组织内的丙二醛大量积累。
The activities of superoxide dismutase (SOD) in leaves, shoots and roots of infected paulownia were always lower than that in healthy plants, while the activity of peroxidase was opposite. The accumulation of malondialdehyde (MDA) in tissues was abundant.