Phenolic compounds and antioxidant capacities in grape berry skin, seed and stems of six winegrape varieties grown in Turkey
Hande Tahmaz Karaman
Ankara University, Faculty of Agriculture, Department of Horticulture, 06110 Ankara, TurkeyDamla Yüksel Küskü
Bilecik Seyh Edebali University, Landscape and Ornamental Plants, Vocational High School, 11230 Bilecik, TurkeyGökhan Söylemezoğlu
Ankara University, Faculty of Agriculture, Department of Horticulture, 06110 Ankara, TurkeyAbstract
In this study, seeds, skins and stems of the red wine grape varieties Boğazkere, Cabernet Sauvignon, Merlot, Nero d’Avola, Sangiovese and Syrah grown in Turkey were analysed for their phenolic compounds.
The highest total phenolic compound and DPPH were found in the stem of Boğazkere respectively as
62550 mg GAE/kg dw and 614 µmol/g dw; the highest ABTS•+, (+)-catechin, (–)-epicatechin were detected in the seed of Nero d’Avola respectively as 617 µmol trolox/g dw, 8650 mg/kg and 1902 mg/kg dw; the highest total anthocyanin and rutin were measured in the skin of Boğazkere respectively as 143.52 mg/kg dw and 9692 mg/kg dw; the highest quercetin was found in the seed of Boğazkere as 49.21 mg/kg dw and the highest trans-resveratrol was measured in the stem of Syrah as 61.56 mg/kg dw.
Keywords:
grape seed, grape skin, grape stem, trans-resveratrol, ABTS•References
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Ankara University, Faculty of Agriculture, Department of Horticulture, 06110 Ankara, Turkey
Bilecik Seyh Edebali University, Landscape and Ornamental Plants, Vocational High School, 11230 Bilecik, Turkey
Ankara University, Faculty of Agriculture, Department of Horticulture, 06110 Ankara, Turkey
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