摘要
采用不同浓度苦参(Sophora flavescens)提取物灌根处理茄子幼苗,研究对茄子黄萎病抗性及根际微生物种群数量的影响。结果表明:苦参处理后茄子植株的发病率和病情指数较对照低,对黄萎病的抗病性增强,其中2g·L-1苦参提取物处理的抗病性最高,发病率仅为13.04%,病情指数为3.26%。经苦参提取物处理后健康茄子植株根际真菌(F)数量较对照增加16.67%～89.33%,放线菌(A)数量显著高于对照,细菌(B)数量较对照降低,感病植株茄子经苦参提取物处理后根际真菌有所减少。随苦参提取物浓度增加,A/F比值增高,提高了土壤中放线菌的数量;B/F比值增高,提高了细菌在根际土壤微生物中的比例。
Eggplant seddlings were treated with Sophora flavescens extracts, and the effects of resistance to Veticillium wilt and microbial populations in rhizosphere were investigated. The rusuhs showed that Sophora flavescens extracts had significant effects on the resistance and rhizosphere microbial population. The higher the congcentration of Sophora flavescens extracts was applied, the lower disease index of eggplant Veticillium wilt was. The strongest resistance was found when the concentration of Sophora flavescens extracts of 2g·L^-1 was used. More actinomyces and fewer bacterial populations were observed in rhizosphere of healty eggplants. For the infected plants, the populations of fungi decreased relative to the control. The higher the concentration of Sophora flavescens extracts was applied, the more populations of actinomyces were, resulting in higher A/F value. Higher B/F value resulted in more bacteria in the rhizosphere.
出处
《沈阳农业大学学报》
CAS
CSCD
北大核心
2009年第2期215-217,共3页
Journal of Shenyang Agricultural University
基金
国家自然科学基金项目(307714692)
辽宁省教育厅项目(2008637)
沈阳农业大学青年基金项目(20070213)
关键词
苦参提取物
黄萎病
发病率
根际微生物
Sophora flavescens extract
Verticillium wilt
disease rate
rhizosphere microbial
