吡虫啉胁迫对生菜中多酚氧化酶活性的影响

The Changes of the Activity of Polyphenoloxidase of Lett Uce under the Imidacloprid Stress

目的研究在吡虫啉胁迫下,生菜中多酚氧化酶(PPO)活性的变化。方法用分光光度法测定多酚氧化酶的活性。结果二个浓度的吡虫啉均诱导了生菜中PPO的活性,含量明显高于对照组,并随时间变化而逐渐减少,最终基本与对照组一致。结论在生菜遭受吡虫啉胁迫初期PPO活性即变化显著,可作为吡虫啉迫胁生菜比较敏感的生物指标。

Objective An experiment was carried out to study the effects of imidacloprid stress on the activities of polyphenoloxidase（PPO） in Lettuce Lett uce. Methods＇ The activities of ppo was determined by spectrophotography method. Results The results showed that the activity of PPO was promoted under the imidaclopfid stress in two concentration groups. Its concent is obviously higher than control group, Then declined. At last, it is consistent with the control group. Conclusion The activity of PPO in salad suffered Imidacloprid stress changes significantly in the early time, so PPO could be served as sensitive biomarker under Imidacloprid stress in salad.