Effects of salicylic acid on some antioxidant content activity in grape (Vitis vinifera L. cv. Shahan (

Salicylic acid (SA) an endogenous plant growth regulator, has been found to generate a wide range of metabolic and physiological responses in plants thereby affecting their growth and development. The aim of this study was evaluation the effect of different levels of Salicylic acid foliar application on quality and some antioxidant activity of Vitis viniferaL. cv. Shahani. The grape wines variety of Shahani is selected from one suitable garden in Maragheh and for every treatment is marked 5 grape plant. This experiment performed in frame completely randomize block design whit three replications in (0, 0.5, 1 and 2 mM) levels of SA treatments. The result showed that in foliar application of Salicylic acid with high concentrations (2 mM) increased of leaves and fruits phenol content, vitamin C, TA and total nthocyanin compound. Finally, maximum amount of total antioxidant has been stablished in 2mM SA concentration that demonstrated 18% increase in compare with control. SA foliar application caused to decrease of total soluble solid (TSS) content but had not any significant effects on flavonoid and total carotenoid of grape berries. These results further indicated that the effects of Salicylic acid in grape is associated with induce defensive systems and increase biological performance such as antioxidant activity and different quality fields in grape.