DENİZLİ–ÇAL YÖRESİNDE YETİŞTİRİLEN ŞARAPLIK ÜZÜM ÇEŞİTLERİNİN FARKLI DOKULARINDA FENOLİK BİLEŞİK İÇERİKLERİNİN BELİRLENMESİ
Fenolik bileşikler üzümlere organoleptik özellikler kazandırmasının yanı sıra asmaları stres faktörlerinekarşı koruyan bileşiklerdir. Bu bileşikler aynı zamanda insan sağlığına yararlı antioksidatif özellikleresahiptirler. Fenolik bileşiklerin miktarları üzüm çeşitlerine ve dokulara göre değişmektedir. Bu araştırmadaDenizli ilinin Çal ilçesinde yetiştirilen şaraplık üzüm çeşitlerinin farklı dokularında fenolik bileşikiçeriklerinin belirlenmesi amaçlanmıştır. Boğazkere, Cabernet Sauvignon, Çal Karası, Merlot ve Öküzgözü(Vitis vinifera L.) çeşitlerine ait çekirdek, kabuk, salkım iskeleti ve yapraklar fenolik bileşik içerikleri veantioksidan kapasiteleri yönüyle incelenmiştir. Araştırma sonuçlarına göre Öküzgözü çeşidi, dokularındakifenolik bileşik içerikleri yönüyle ön plana çıkmıştır. En yüksek antioksidan kapasite (1.133,8 µmol troloxg⁻¹ Kuru Ağırlık), (+)–kateşin (29.652 mg kg⁻¹ Kuru Ağırlık), rutin (460,7 mg kg⁻¹ Kuru Ağırlık) ve trans–resveratrol (45,5 mg kg⁻¹ Kuru Ağırlık) miktarları Öküzgözü çeşidinin dokularından elde edilmiştir.Araştırmadan elde edilen bir diğer önemli sonuç ise, salkım iskeletinin de çekirdek gibi yüksek fenolikbileşik içeriğine sahip olduğunun tespit edilmesidir.
DETERMINATION OF PHENOLIC COMPOUND CONTENTS IN DIFFERENT GRAPE TISSUES OF WINE GRAPE VARIETIES GROWN IN ÇAL–DENİZLİ REGION
Phenolic compounds provide organoleptic properties to grapes as well as compounds that protect vines against stress factors. These compounds also have antioxidative properties for human health. The amounts of phenolic compounds vary according to grape varieties and tissues. This research was carried out to determine phenolic compound contents in different tissues of wine grape varieties grown in Denizli–Çal province. Seeds, skins, stems and leaves of the Boğazkere, Cabernet Sauvignon, Çal Karası, Merlot and Öküzgözü were investigated in terms of phenolic compound contents and antioxidant capacities. Results show that, Öküzgözü variety has come to the for front in terms of phenolic compounds contents in the tissues. The highest antioxidant capacity (1.133,8) µmol trolox g⁻¹ Dry Weight, (+)–catechin (29.652 mg kg⁻¹ Dry Weight) and rutin (460,7 mg kg⁻¹ Dry Weight) were found in Öküzgözü variety tissues. Another important result obtained from the research is that the stem has a high phenolic compound content such as seed.
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