The Evaluation of Total Phenolic, Flavonoid, Sugar Contents and Antioxidant Activity of Tayfi Grape in Turkey

Yıl 2017, Cilt: 7 Sayı: 2/2, 14 - 22, 28.12.2017

İbrahim Selçuk Kuru , Pınar Karakuş Orcan Filiz Akbaş Çiğdem Işıkalan , Süreyya Namlı

Öz

Tayfi (Vitis vinifera L.) only grown in the Southeastern Anatolia Region provides a major contribution on the economy of the region people. But, the research related to nutritional content of this species was not found. This study was carried out to determine the total phenolic, flavonoids, sugar content and antioxidant activity of different organe (mature/young seed and leaf ) ‘Tayfi’ grape. The highest amount of total phenolic (380,94 μg GAE/mg extract) was found to be in the young seeds. The high amount of total flavonoid content (107,21 µg QEs/mg extract) was obtained from young leaves. Higher antioxidant activity was observed in young seeds (91,32%) as expected from high contents of total phenolics. In general, as the total phenolics in seed increased, the antioxidant activities also increased. Also, changes in sugar content (glucose, fructose, sucrose and maltose) were determined in leaf from seed (young and mature) of Tayfi grape by HPLC. The highest concentration of sucrose was descripted in mature seed (9,29 mg/g).

Anahtar Kelimeler

Vitis vinifera L. Tayfi, Total flavonoids, Total phenolics, Antioxidant activity, Sugars

Türkiye'de Yetişen Tayfi Üzüm Çeşidinin Toplam Fenolik, Flavonoid, Şeker İçeriği ve Antioksidan Aktivitesinin Değerlendirilmesi

Öz

Tayfi (Vitis
vinifera L.) ülkemizde sadece Güneydoğu Anadolu Bölgesi'nde yetişen ve
bölge halkının ekonomisine önemli katkı sağlayan bir üzüm çeşidi olmasına
rağmen, besin içeriği ile ilgili herhangi bir çalışmaya rastlanmamıştır. Bu
nedenle çalışmamızda Tayfi üzüm çeşidinin farklı organlarında (genç/olgun tohum
ve yaprak) toplam fenolik, flavonoid, şeker içeriği ve antioksidan aktivitesinin
belirlenmesi amaçlanmıştır. En yüksek toplam fenolik miktarının (380,94 μg GAE/mg ekstre) genç tohumlardan, toplam flavonoid
içeriğinin en yüksek miktarı (107,21 μg QEs/mg ekstre) ise genç yapraklardan
elde edilmiştir. Ayrıca yüksek fenolik içeren genç tohumlarda yüksek
antioksidan aktivite de (%91,32) gözlenmiştir. Genel olarak tohumdaki toplam
fenolik miktar arttıkça, antioksidan aktivite de artmıştır. Bununla birlikte
Tayfi üzümünün  tohum ve yapraklarındaki
(genç ve olgun) şeker (glukoz, fruktoz, sükroz ve maltoz) miktarı değişimleri
HPLC ile belirlenmiştir. Sükrozun en yüksek konsantrasyonu, olgun tohumda (9,29
mg/g) bulunmuştur.

Anahtar Kelimeler

Vitis vinifera L. Tayfi, Toplam flavonoid, Toplam fenolik, Antioksidan aktivite, Şeker

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