CAJ | 학술논문

【目的】探讨青枯菌侵染下外源硅处理对番茄青枯病的抗性效果及生理作用机理，为青枯病的有效防治提供参考依据．【方法】选择青枯病易感番茄品种为试验材料，通过盆栽土培和水培试验，研究硅处理和青枯菌Ralstonia solanacearum接种对番茄青枯病病情指数、叶片抗氧化酶活性的影响．【结果和结论】硅能显著增强番茄青枯病抗性．硅处理使青枯病的病情指数在土培试验和水培试验下分别降低29.1％～93.0％和6.3％～100.0％．青枯菌侵染条件下硅处理能显著增加番茄叶片抗氧化酶活性．在土培试验中，加硅使番茄叶片的POD、CAT酶活性分别增加了43.17％和23.17％；水培试验在接种第3天，加硅使POD、CAT、PAL酶活性分别增加了122％、337％和31％．本研究表明硅对番茄青枯病的抗性机理可能是硅诱导植物产生一系列生物化学防御反应，增强了番茄对青枯病菌的抗性．
【목적】탐토청고균침염하외원규처리대번가청고병적항성효과급생리작용궤리，위청고병적유효방치제공삼고의거．【방법】선택청고병역감번가품충위시험재료，통과분재토배화수배시험，연구규처리화청고균Ralstonia solanacearum접충대번가청고병병정지수、협편항양화매활성적영향．【결과화결론】규능현저증강번가청고병항성．규처리사청고병적병정지수재토배시험화수배시험하분별강저29.1％～93.0％화6.3％～100.0％．청고균침염조건하규처리능현저증가번가협편항양화매활성．재토배시험중，가규사번가협편적POD、CAT매활성분별증가료43.17％화23.17％；수배시험재접충제3천，가규사POD、CAT、PAL매활성분별증가료122％、337％화31％．본연구표명규대번가청고병적항성궤리가능시규유도식물산생일계렬생물화학방어반응，증강료번가대청고병균적항성．
[Objective]The objective of this study was to investigate the physiological mechanism of sili-con-induced resistance of tomato plant to bacterial wilt .[Method]Pot experiments with soil and hydropo-nic cultivation were conducted to study the effects of silicon supply on the disease index of bacterial wilt and antioxidant enzymes of tomato leaves .[Result and conclusion]The results showed that exogenous Si treatment reduced the disease index of bacterial wilt by 29.1%-93.0% respectively in soil cultivation experiment and 6.3% -100% respectively in hydroponic experiment compared with no-Si-treatment.Compared with the no-silicon treatment , Si application increased POD and CAT activity of tomato leaves by 43.17% and 23.17% in soil cultivation experiment .Si amendments significantly increased POD , CAT and PAL activity of tomato leaves by 122%, 337% and 31% respectively in hydroponic experi-ments.In conclusion, Si supply has an important role in suppressing bacterial wilt caused by Ralstonia solanacearum.The pathogen resistance mediated by Si is associated with the activation of defense-related enzyme activities in leaves .