POD activity maintained at high level.

过氧化物酶也保持较高的活性；

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And the bigger the spot was, the higher POD activity was.

一年生枝条上病斑越大，POD酶活性越高。

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And the bigger the spot was, the higher POD activity was.

一年生枝条上病斑越大，POD酶活性越高。

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