ACTA HORTICULTURAE, cilt.1, sa.1276, ss.131-137, 2020 (Scopus)
Many researches have been conducted on phenolic compounds because of their
responsibilities for protecting grapevines against stress conditions besides adding
color and flavour characteristics to the grapes. Another reason for intensive studies
conducted on them is because they have antioxidative effects on human health. This
research was carried out to determine and compare of antioxidant capacity and
phenolic contents in different tissues of 16 red grape cultivars grown in Kalecik
Viticultural Research and Experiment Station Cultivar Collection vineyard. Antioxidant
capacity in the seed and skin; total phenolic compounds in the seed, skin, stem and
leaves; total anthocyanin in the skin; catechin, epicatechin, quercetin, rutin, transresveratrol and cis-resveratrol in the seed, pulp, skin, stem and leaves were
determined. The highest total phenolic compound contents were determined in skin,
seed, stem and leaves, respectively; ‘Bogazkere’ (51.675 mg kg-1 DW), ‘Trakya Ilkeren’
(107.625 mg kg-1 DW), ‘Red Globe’ (123.250 mg kg-1 DW) and ‘Red Globe’ (45.250 mg
kg-1 DW). ‘Syrah’ (493.8 μmol trolox g-1 DW) had the highest antioxidant capacity value
in the skin and ‘Okuzgozu’ (1.086 μmol trolox g-1 DW) had it in the seed according to
the results of analysis. The highest content of catechin was found in the seed of
‘Okuzgozu’ (30.069 mg kg-1 DW), content of epicatechin in the seed of ‘Cardinal’ (8.151
mg kg-1 DW), the content of rutin in ‘Trakya Ilkeren’ (733.0 mg kg-1 DW), the content of
quercetin (36.1 mg kg-1 DW), trans-resveratrol content (45.7 mg kg-1 DW) and cisresveratrol amount (8.3 mg kg-1 DW) were in ‘Kohnu’ cultivar.