An updated review on significance of PGPR-induced plant signalling and stress management in advancing sustainable agriculture

Traditional agriculture relies heavily on chemical inputs, which pose significant threats to the environment and deplete natural resources. The environmental challenges posed by chemical-based agriculture and emphasizes the urgent need for sustainable alternatives in the face of climate change. Acknowledging the detrimental impact of environmental stressors on global agriculture sets the stage for exploration of PGPR as a promising solution. Plant Growth-Promoting Rhizobacteria (PGPR) have emerged as a sustainable alternative, fostering plant development, and enhancing stress resilience. A comprehensive understanding of the underlying signalling pathways and stress management mechanisms is essential to maximizing their potential. Plant health has been demonstrated, nutrient uptake has improved, and environmental stress has been reduced with the help of PGPR. Identifying the specific plant signalling pathways that are impacted by PGPR and comprehending their function in stress mitigation are critical to creating efficient and sustainable farming practises. Utilizing PGPR-mediated stress control may reduce the need for chemical inputs, encouraging environmentally friendly farming methods. By creating genetically engineered crops with increased stress tolerance, the knowledge gathered in this review can help ensure food security in the face of climate change. The signalling pathways involved, the processes underpinning PGPR-plant interactions, and the responses of plants to diverse stressors when PGPR is present have been explored. This review offers helpful insights into the intricate link between PGPR and plants, putting light on the uncertainties that beg for additional research by critically analysing the present literature and highlighting knowledge gaps.