A comparative study of phenolic composition and antioxidant activity in commercial and experimental seedless table grapes cultivated in a Mediterranean climate

Grapes are important sources of phenolic compounds, which have multiple beneficial effects on human health. Scientific advances in the field genetics allowed production seedless table grape varieties, highly demanded by consumers because their nutritional value and easy consumption. In this study, total content (TPC), radical scavenging activity (RSA) anthocyanin (TAC), were determined 65 varieties (41 experimental 24 commercial varieties). Ultra-high performance liquid chromatography coupled to an ion-trap mass spectrometry detector (UHPLC-IT-MS/MS) was used identify quantify some acids, flavan-3-ols, flavonols stilbenes 14 varieties. TPC ranged from 17 250 mg gallic acid equivalents/100 g fresh weight (FW), RSA 15 269 Trolox FW TAC 0 168 cyanidin-3-glucoside/100 FW. The assay showed high correlation (R2 = 0.90) between antioxidant grapes analyzed. vast majority new analyzed, similar those common with seeds, indicating promising perspectives for commercialization as potential these bioactive compounds. 6 concentrations catechin, procyanidin B2, epicatechin, quercetin 3-?-d-glucoside, 4-hydroxybenzoic acid, vanillic caftaric rutin found, would indicate that regular intake be recommended.