Probiotic prospects of PGPR for green and sustainable agriculture

To improve crop production and crop nutritional quality in agriculture, plant growth promoting rhizobacteria is applied. In agricultural management practices, they are often included to minimise chemical inputs, increase productivity and restore the natural equilibrium in agro-ecological systems. Microbes are a part of living soil not only in transforming soil nutrients, but also in influencing soil nutrients with multiple functions. Our review provides evidence that plant-mediated microbial communication is more common than predicted. There are specific microbes that help the plant through various mechanisms to grow well in their presence. It is therefore important to harness and exploit these plant growth-promoting rhizobacteria (PGPR) for green and sustainable agriculture. This analysis is an update on PGPR's position in agriculture, from its collection to marketing at low cost, commercial agricultural inputs. First, we introduce the definition and role of the 21st century phytomicrobiome and the agricultural background that underpinned food health. Next, mechanisms for promoting plant growth by PGPR are explored, including the exchange of signals between plant roots and PGPR and how these relationships modulate plant abiotic stress responses by induced systemic resistance. On the applicable hand, techniques to enhance colonisation of the rhizosphere by PGPR inoculants are addressed. The final parts of the paper explain the applications of PGPR in agriculture in the 21st century.Thus the applications and importance of these bacteria in agricultural practices are highlighted to indicate the influence of the PGPR as an effective biocontrol agent.