四霉素诱导水稻对稻瘟病的抗性研究(英文)

Rice Resistance against Blast Induced by Tetramycin

[目的]探讨四霉素诱导抗性的作用及作用机理,为其在生产实践中更好地应用提供依据。[方法]以稻瘟病为防治对象,研究四霉素对水稻叶片苯丙氨酸解氨酶(PAL)、过氧化物酶(POD)、多酚氧化酶(PPO)、超氧化物歧化酶(SOD)的影响。[结果]喷施四霉素后,水稻叶片PAL、POD、PPO活性明显升高,其中喷药24h后接种处理的酶活升高最明显,各处理间SOD酶活无明显差异。[结论]四霉素不仅具有较强的抑菌作用,还可能通过诱导水稻防御酶系活性升高而增强抗病性以防止病菌侵染。

[ Objective] The research aimed to discuss the tetramycin-inducad resistance and its mechanism in order to provide basis for better application in the production. [ Methedl Taking rice blast as the control object, the impacts of tetramycin on the activity of PAL, POD, PPO and SOD in rice leaves were studied. [Result] The activity of PAL, POD and PPO in rice leaves were significantly increased after spraying tetramycin. The activity of enzyme in the treatment of inoculation after spraying terramycin for 24 h increased most obviously. The activity of SOD had no significant difference among different treatments. [ Condesion] Terramycin not only has strong antimicrobial effect, but also might enhance disease resistance in order to prevent pathogen infection through inducing the activity of rice defense enzyme.