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诱导抗虫性研究发现,应用茉莉酸甲酯(MeJA)诱导甘蔗后,其叶片及生长点组织中多酚氧化酶(PPO)活性明显提高,酶活性分别达22～50 units/mg和182～218 units/mg,这与模拟螟虫取食作用的机械损伤诱导作用结果相类似。
The results showed that the activity of polyphenol oxidase (PPO) in leaves and growing point tissues was significantly increased after application of MeJA, with the activity of 22-50 units / mg and 182 ~ 218 units / mg, which is similar to the simulated mechanical damage induced by stem borer feeding.