Salinity is a common abiotic stress factor that seriously affects crop production in some parts of the world, particularly in arid and semi-arid regions. Irrigation with poor quality water is one of the main factors that lead to salt accumulation and as a result decrease in agricultural productivity. Pistachio nut trees ( Pistacia vera L.) have been grown commercially in Iran for many years. Despite pistachio has been justify; MARGIN: 6pt 0in 0pt; unicode-bidi: embed; DIRECTION: ltr; mso-layout-grid-align: none" dir=ltr Key Words : Pistacia vera L., salicylic acid, ascorbic acid, Salinity, physiological and photosynthetical parameters.