硅与青枯菌互作对茄子幼苗抗氧化酶活性的影响

以抗性不同的2个茄子品种为试材,通过水培试验,探讨青枯菌侵染下外源硅对茄子青枯病的抗性及抗氧化酶活性的影响,为茄子青枯病的预防提供参考依据。结果表明:Si+Rs可显著降低病情指数,同时,显著提高茄子根系活力;对于感病品种而言,接菌前,加硅与否对茄苗叶片中的PAL和PPO活性无显著影响,接菌后,Si+Rs的PAL和PPO活性显著高于Rs;而在抗病品种中,不论接菌与否,加硅处理的茄苗叶片中PAL和PPO活性均显著高于不加硅处理。说明施加外源硅能提高叶片中相关抗氧化酶活性并增强茄子对青枯病的抗性。

The Effect of Silicon and Ralstonia solanacearum Interaction to the Activity of Antioxidant Enzymes of Eggplant Seedings

The objective of this study was to investigate the activity of antioxidant enzymes of silicon induced resistance of eggplant seeding to bacterial wilt, two different resistance eggplant materials was used throughout the hydroponic cultivation. The results showed that exogenous silicon significantly reduced the disease index of bacterial wilt, meanwhile, significantly increased root activity; For the susceptible to R. solanacearum of eggplant, Before R. solanacearum inoculation, Si amendments had no effect on activity of PAL and PPO as well as non-Si-treatment, After R. solanacearum inoculation, compared with the non-Si-treatment, Si supply significantly increased the activity of PAL and PPO; But for the resistance to R. solanacearum of eggplant, the activityof PAL and PPO treated with Si amendment were significantly higher than non-Si-treatment respectively. The results suggested that Si amendment could increase the activity of antioxidant enzymes of eggplant leaves, thereby increased the resistance to R. solanacearum.