**4. Conclusions and prospects**

The salinity of soils is significantly limiting crop production in most arid and semi-arid regions of the world. Owing to their sensitivity to salinity stress, most agricultural crop plants exhibit soil salinization-accrued inhibition in growth, metabolism, development, and productivity (yield). Thus, salinity-caused serious impacts on crop health and productivity are challenging food security. Though very small molecules are produced in small quantities, phytohormones have versatile roles in plants as the major regulator of various signaling cascades interrelated with plant development, stress resilience, and coping mechanisms. Apart from presenting a brief overview, this chapter attempted to enlighten the major roles (and the basic mechanisms involved) of selected 10 phytohormones (ABA, auxins, BRs, CKs, ethylene, GAs, JA, NO, SA, and SLs) in plant-salinity tolerance. An optimum concentration and timely exogenous application of these phytohormones would be a promising approach for countering the salinity stress impacts in crop plants. There are still challenges to understanding how ABA, auxins, BRs, CKs, ethylene, GAs, JA, NO, SA,
