Abstract: Background: In nature, the plants are exposed to various biotic and abiotic stress factors. In abiotic factor soil salinity, water deficit, heavy metal and extreme temperature are included are the major factors which directly inhibit growth and development of crop plants (Ali, M, H, & Athar, 2007). In these abiotic stresses, the drought/water deficit is major abiotic stress that limits biological yield (Ashraf & Foolad , 2007).Among abiotic stresses drought is a major detrimental factor all over the world.