Bacillus cereus CH2对茄子黄萎病的田间防治效果研究以及对根围微生态群落结构的影响

Biocontrol efficacy and impact on the rhizosphere community structure of Bacillus cereus CH2 against verticillium wilt on eggplant in the field condition

摘要:

拟对Bacillus cereus CH2菌株在田间条件下, 对茄子黄萎病的防治效果及其对茄子根围土壤微生物群落结构和功能的影响进行研究。田间试验显示蜡状芽孢杆菌Bacillus cereus CH2对茄子黄萎病有60.6%的防治效果。对菌剂和清水对照处理小区茄子根围土壤的Biolog分析显示, CH2的使用不会对根围土壤原有微生物群落结构和功能多样性产生显著影响, 同时对六大类碳源利用能力的分析结果显示, CH2的使用能在植株生长前期提高根围土壤微生物群体对除酚类化合物的五大类碳源的利用能力。

关键词:茄子黄萎病, 微生物群落, 多样性, 碳源

Abstract:

In this study we aimed to evaluate the biocontrol efficacy of Bacillus cereus CH2 against Verticillium wilt on eggplant in field condition and its influence on rhizosphere microbial community structure. Based on the results we can make a conclusion that Bacillus cereus CH2 could reduce the desease incidence of Verticillium wilt on eggplant at 60.6%. The Biolog data showed that inoculating of CH2 had no significant impacts on the diversity of microbial community in rhizosphere. It also showed that its inoculation could increase utilizing ability of five groups of carbon sources except the phenolic compounds during the early growth stage of plants.

Key words:Verticillium wilt, Microbial community, Diversity, Carbon source