Siirt İli Asma Gen Kaynakları İçerisinde Öne Çıkan Bazı Yerli Üzüm Çeşitlerinin Toplam Fenolik ve Antioksidan İçerikleri

Öz

Güneydoğu tarım bölgesi içerisinde yer alan Siirt ili, gelişme dönemi içerisindeki ortalama sıcaklıklar ve EST (Etkili Sıcaklık Toplamı) bakımından ülkemizin en yüksek değerlerine sahip illerinden biridir. Söz konusu ilimiz, iklim olarak hem sofralık, hem kurutmalık hem de şıralık ve şaraplık üzüm çeşitlerinin yetiştirilmesi için elverişli olmasının yanı sıra, en erkenci çeşitlerden en geç olgunlaşanlara kadar, her olgunluk kademesindeki çeşitlerin yetiştirilmesi şansına da sahiptir. Oldukça zengin bir asma gen potansiyeline sahip ülkemizde fenolik bileşikler ve antioksidanlar bakımından zengin gıdalar arasında yer alan üzümün çeşitler bakımından sahip oldukları potansiyelinin ortaya konulması oldukça önemlidir. Bu çalışmada Siirt ili asma gen kaynakları içerisinde öne çıkan Bağılti, Besirane, Emiri, Siirt-1 ve Tayfi üzüm çeşitlerinin toplam fenolik ve antioksidan içerikleri belirlenmiştir. Çalışmada spektrofotometrik yöntemler kullanılmıştır. Elde edilen bulgulara göre, çeşitlerin toplam fenolik bileşik içerikleri 3.94 mg gallik asit eşdeğeri (GAE) g⁻¹ (Emiri) ile 1.38 mg GAE g⁻¹ (Siirt-1), antioksidan içerikleri ise 292.79 µg 100 g⁻¹ (Emiri) ile 121.87 µg 100 g⁻¹ (Siirt⁻¹) arasında değişim göstermiştir.

Anahtar Kelimeler

• Asma gen potansiyeli
• toplam antioksidan
• toplam fenolik
• spektrofotometrik yöntemler

Total Phenolic and Antioxidant Contents of Some Common Domestic Grape Cultivars Within Grape Gene Resources of Siirt Province

Öz

Siirt province located in the South Eastern Agricultural Region is one of the highest values of the country in terms of average temperatures and EHS (Effective Heat Summation) during the growing period. This province is suitable for growing of the table, raisin, must, and wine grape cultivars, in point of climatic conditions; and besides, it has the chance to grow all varieties in the broad maturity period, from the earliest to the latest. It is very important to determine the potential of grape varieties that are rich for the phenolic compounds and antioxidant in our country which has a very high grape gene potential. In this study, the total phenolic and antioxidant contents of Bağılti, Besirane, Emiri, Siirt-1 and Tayfi grape cultivars which are common grapevine genetic resources in Siirt have been determined. Spectrophotometric methods were used in the study. According to the findings, the total phenolic compound contents of the varieties ranged from 3.94 mg gallic acid equivalent (GAE) g⁻¹ (Emiri) to 1.38 mg GAE g⁻¹ (Siirt-1), while antioxidant contents varied from 292.79 μg 100 g⁻¹ (Emiri) and 121.87 μg 100 g⁻¹ (Siirt-1).

Anahtar Kelimeler

• Grapevine gene potential
• total antioxidant
• total phenolics
• spectrophotometric methods

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