Abstract
Economy of many countries in the world hinges on the agriculture and thus directly or indirectly on soil quality. Soil salinity is one of the major abiotic constraints negatively impacting the agricultural productivity in arid and semiarid regions. Physical and chemical amendments (irrigation and leaching with chemicals) used to reclaim soil salinization pollute groundwater, waterbodies, and aquatic life. Use of plant growth-promoting bacteria (PGPB) for amelioration of salt stress in soil is a sustainable and ecofriendly measure, which not only reconciles saline soil but also augments nutritional values in soil. PGPB use array of mechanisms to promote growth and endurance in plants by minimizing the adverse effect of salinity. PGPB can enhance the expression of various salt stress-related genes in plants that supplement growth and yield under salinity. This chapter focuses on the effects of salinity on agroecosystems and role of PGPB in alleviation of salt stress in plants. The chapter also emphasizes on the utilization of PGPB-based biostimulants in improvising soil health and strengthen plant productivity.KeywordsSalinityPGPBNutrients uptakePhytohormonesAntioxidantsReclamation
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