【摘要】 棉株体内的多酚氧化酶在蚜虫取食胁迫条件下 ,其活性发生较大变化。试验结果表明 :蚜虫取食前不同品种的多酚氧化酶活性差异不显著 ,取食后不同抗性品种的多酚氧化酶活性差异显著 ,多酚氧化酶的活性与棉花的抗蚜性呈正相关更多还原

【Abstract】 The result showed that Polyphenol oxidase (PPO) activity in high resistant cotton increased quickly, but susceptive variety’s increased slowly. No significant differences of PPO activity were found among all cotton varieties before aphid feeding. Resistance of cotton against aphid was positive correlated to PPO activity.更多还原