Evaluation of Phenolic Compounds, Antioxidant Activities and AntioxidantEnzymes of Wild Grape Peel and Pulp

Peel and pulp of grape (vitis vinifera l.) berries contain a wide range of bioactive compounds that may be responsible fortheir biological activities. phenolic compounds, antioxidant capacity and antioxidant enzymes of wild grape accessionsfrom the west azerbaijan province were investigated in different fractions of berries, i.e., peel and pulp fractions. thetotal phenol (tp) content ranged from 139.29-843.10 and 151.67-416.91 mg gallic acid equivalent (gae) per 100 g in thepeel and pulp, respectively. the highest level of antioxidant capacity and antioxidant enzymes activities (catalase (cat)and superoxide dismutase (sod)) in all the native accessions was observed in peel fraction. also, principal componentanalysis (pca) demonstrated that genotypic effect is more pronounced toward peel antioxidant activity based on 2,2-diphenyl-1-picrylhy (dpph) assay and pulp total anthocyanin (ta) of grape berries. the present study displays thepotential of native grapeaccessions studied for improvement of nutritional value through germplasm enhancementprograms.