Bacillus spp. isolated from pepper leaves and their function and inhibition of the fungal plant pathogen Colletotrichum scovillei

Abstract Background Pepper is a popular ingredient in many Chinese households; however, anthracnose caused by Colletotrichum spp. has greatly decreased pepper production. The genus Bacillus widely known for its important role the development and protection of plants from phytopathogenic fungi. Results Fifty-eight endophytic strains were isolated leaves tested antifungal activity this study. Specifically, L1-7 L3-5 displayed growth inhibition rates 79 80% against C . scovillei mycelium, respectively, while 25 these all had greater than 60%. amyloliquefaciens B. velezensis , based on culture morphological identification with 16S rDNA gyrB gene sequence analyses, determined to be respective species L3-5. Additionally, it was discovered that two antagonistic bacteria could fix nitrogen, produce indoleacetic acid (IAA) have high salt tolerance. Pot experiments again showed excellent control pathogen L3-5, 80.64 73.39% control, respectively. Therefore, B (L1-7) (L3-5) can applied as biological agents protect peppers -caused anthracnose. Conclusion Thus, they serve promising biocontrol plant promoters, future research pertinent will useful guide creation microbial resources.