Biocontrol Efficacy on Tomato Bacterial Wilt by Bacillus subtilis Bs916

doi:10.16409/j.cnki.2095-039x.2016.02.014

Abstract

Abstract: IIn this study, the biocontrol efficacy of Bacillus subtilis Bs916 on tomato bacterial wilt and its impact on the Ralstonia solanacearum community in stem and root surface, microbial community in rhizosphere were evaluated in Petri dishes and pots. Results showed that Bs916 could stimulate the growth of tomato seedlings in MS plates. Seedling fresh weight was increased by 9.61% at 15d after treatment. The biocontrol efficiency of strain Bs916 on tomato bacteria wilt was 55.6% in pot experiments. Populations of R. solanacearum on root surface and in stem when treated with Bs916 were 1/100-1/10 and 1/50-1/2, respectively, of that in untreated plants. In addition, Bs916 suppressed population of rhizosphere soil bacteria initially, and promoted it later. In the early days after treatment with Bs916, the fungus amount reached a peak, and then declined rapidly. Bs916 did not affect significantly the actinomycetes amount. This study showed that B. subtilis Bs916 is of potential to be used as a biocontrol agent in suppressing tomato bacterial wilt in field.

Key words: Bacillus subtilis Bs916, tomato bacterial wilt, growth promotion, biocontrol, microbial community in rhizosphere

CLC Number:

S476

QIAO Junqing, CHEN Zhiyi, LIANG Xuejie, LIU Yongfeng, LIU Youzhou. Biocontrol Efficacy on Tomato Bacterial Wilt by Bacillus subtilis Bs916[J]. journal1, DOI: 10.16409/j.cnki.2095-039x.2016.02.014.

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