Bacillus velezensis (antagonist)

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colonies of Fusarium culmorum (left) and Aspergillus flavus (right), co-inoculated with Bacillus velezensis LM2303 (colonies at the side), the growth of the fungi is inhibited around the Bacillus colonies (click on image to enlarge it)
Author(s): Liang Chen, Junying Heng, Suya Qin, and Ke Bian
Source: PLoS ONE, 2018, 13 (6) e0198560

Bacillus velezensis (antagonist) Ruiz-García et al. 2005

This species is an aerobic, gram-positive, endospore-forming bacterium that promotes plant growth. It colonises the plant rhizosphere, and while competing with other microbes in that environment, it excretes a number of antimicrobial substances that suppress a large variety of plant disease-causing organisms, including bacteria, fungi, and nematodes.

B. velezensis belongs to the Bacillus amyloliquefaciens species group. Several strains are available commercially, for example as RhizoVital® (which had been originally classified as B. amyloliquefaciens).