Use of zeolite and salicylic acid as an adaptation strategy against drought in wheat plants

With the prevalence of water scarcity and a growing demand for food, it is imperative to utilize inexpensive and environmentally friendly materials such as zeolite (Ze) and salicylic acid (SA) in agricultural farms. In this regard, in the present study we measured the effects of exogenous application of Ze (4 g/kg soil and 8 g/kg soil) and SA (1 mM) on wheat plants Cv. Sirvan in both normal (100% FC) and drought stress (40% FC) conditions. The study measured several physiological, biochemical and morphological characteristics, including antioxidant enzyme activities (POD, CAT, APX), soluble sugar, soluble protein, inorganic ions (K+, Ca2+, and Mg2+), grain number and grain yield. SA and Ze (8 g/ kg) significantly improved drought tolerance of wheat plants. SA and Ze (8 g/ kg) also had positive effects on control plants. We therefore concluded that external application of SA (1 mM) and Ze (8 g/ kg) is recommended for improving drought tolerance.