Effect of terroir on the volatile and phenolic composition of merlot wines from Sarkoy-Thrace and Urla-Eagean region of Turkey


Thesis Type: Postgraduate

Institution Of The Thesis: Cukurova University, Fen Bilimleri Enstitüsü, Gıda Mühendisliği, Turkey

Approval Date: 2018

Thesis Language: Turkish

Student: HİLAL MERAL

Supervisor: Turgut Cabaroğlu

Abstract:

In this study, red wineswere produced from Merlot grapes,which grown in Urla-Aegean region and in Şarköy-Marmara region, and the composition, phenolic properties, aroma and sensory properties of these wines were investigated. Phenolic properties were determined with spectrophotometric method and aroma composition of wines were identified and quantified with GC-MS/FID. 59 aroma compounds were identified in wine of Urla region and 63 aroma compounds were found in wine of Şarköy region. Higher alcohols, esters and volatile acids have been determined as the most dominant aroma groups in both wines. In Şarköy region wines the amounts of esters and lactones, having a positive effect on wines, were found to be higher than Urla region. The amounts of total phenolic compounds, tannins and anthocyanins were determined to be higher in Şarköy region wines. According to the results of sensory analyses; it has been found that wine of Urla region is characterized by red fruit, black fruit and dry fruit odors and wine of Şarköy region is characterized by vanilla, red fruit and black fruit odors. It has been determined that the wine of Şarköy region is more rich in phenolic compounds, more fruit-flavored, astringent, full bodied and longer on the palate compare with the wine of Urla region. When two region is compared, it can be state that Şarköy region is more suitable for high quality wine