Figure 1.

Biological control interactions exerted by the plant growth-promoting bacteria (PGPB). This illustration depicts the interactions between PGPB, phytopathogens, and plants. PGPB promote plant growth either by direct and or indirect mechanisms. PGPB colonize plant’s rhizosphere and produce antimicrobial metabolites. In the plant’s rhizosphere, antibiosis and nutrient competition interaction suppresses the growth of phytopathogens. Elicitors of induced systemic resistance (ISR) production by PGPB and in the simultaneous presence of phytopathogens enhanced the plant ISR. Thus, this mediated defense response of plants towards phytopathogens and consequently enhanced plant growth and health.