Abstract:
Plant Growth Promoting Rhizobacteria (PGPR) live in the rhizosphere – a vast place for microbes to inhabit – but they are the only kind of bacteria that can pass on benefits to host plants like growth promotion and disease suppression. Apart from the bacteria that are known for promoting plant growth
which can suppress the pathogens, the PGPR restricts the negative impact of the pathogens in different ways. Besides, it is not always the case that a cumulative or synergistic effect is produced by the application of a bacterial consortium. In this review, the PGPR disease suppressive mechanisms are re-visited and the diversity of function, stability, or both among PGPR taxa regarding these mechanisms are presented. Furthermore, we demonstrate that PGPR mixture applications, rather than single PGPRs, are good for crop protection against many diseases and emphasize the main factors for the successful application of PGPR mixtures.
