Effect of plant growth-promoting rhizobacteria on alleviating salinity stress in plants: a review

Salt stress is a significant complication persisting in the soils of agricultural fields which contributing major stress factor for the inefficient growth and development of plants leading to declined productivity and soil degradation worldwide. Therefore, it would be beneficial to develop salinity stress tolerant plant species and to grasp the mechanism of stress tolerance that simulates the assembly of bioactive diffusion compatible matter that are of good significance to salt stress conditions. The plant growth-promoting rhizobacteria (PGPR) will be the reliable agents to control and manage the salinity stress in plants under direct and indirect mechanisms. Application of salinity tolerant PGPR inoculates could be a promising tool to combat salinity in agricultural fields, thereby increasing worldwide food production. The useful effects of PGPR involve boosting key physiological processes as well as water and nutrient uptake, photosynthesis and source sink relationships that promote growth and development. This article explores the mechanisms of PGPRs tolerant to salt stress in different plants and the genes responsible for the process. Considering all of the available existing mechanisms, genes of different microbes and plants which facilitate the resistance to plants for salt stress can be studied.