Bacillus subtilis 30B-B6, a promising bacterium for the biocontrol of early and late blight
(2019) EuroBlight — Location: York, uk (12.May.2019)
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- Recent studies on the antagonistic activities of bacteria isolated from agroecosystems in Belgium led to the selection of Bacillus and Pseudomonas with proven antagonistic abilities against fungal potato pathogens. Direct confrontation tests showed that the strain 30B-B6 of Bacillus subtilis displayed a good activity (from 60 to 70%) against Phytophthora infestans, Alternaria solani, Fusarium solani and Rhizoctonia solani. In planta tests were performed under controlled conditions in order to evaluate the biocontrol potential of this strain. The foliar application of a suspension of this bacterium before the inoculation with P. infestans or A. solani resulted in a reduction of the disease (around 70%). A pre-treatment of tomato roots substrate with a suspension of the strain 30B-B6 before the foliar inoculation with A. solani led to a decrease of disease intensity up to 68%. These results demonstrate the local and the systemic protection conferred to the plant by the bacterial treatment. The antimicrobial metabolites produced by the strain 30B-B6 and the metabolic pathways involved in the induction of systemic resistance on tomato are now investigated in order to evaluate the potential of 30B-B6 as biocontrol agent.
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Colau, G., Caulier, S., Mahillon, J., Bragard, C., & Legrève, A. (2019). Bacillus subtilis 30B-B6, a promising bacterium for the biocontrol of early and late blight. EuroBlight, York, uk. https://hdl.handle.net/2078.5/255705