Assessment of electrochemical attribute and monoterpene content of twelve aromatic grape cultivars (V. Vinifera L.) grown under the ecological conditions of northwestern Turkey

Abstract

Electrochemical attributes of fruits are important for quality assessment in various fruit species and also grapes. Grape-derived glycosides, which are also partly prominent cultivar grape aroma, are considered to be the primary precursors for table and wine grape aroma. These quality characteristics of berries may depend on cultivar, ecological conditions and viticultural practices used in vineyard. In present study, results showed great quantitative differences in the berry chemical properties of grape cultivars. The levels of free and potentially monoterpenes in juice from cv. Muscat Ottonel were respectively the highest (3.443 and 9.968 mg/l), while cv. Merlot had the lowest amount of levels of free and potentially monoterpenes (0.793 and 1.965 mg/l). In terms of p-values, it was seen that of the cultivars cv. Merlot had the lowest p-value (108.73 ?W) and the highest value was obtained from cv. Muscat Ottonel (141.77 ?W). As a result, Muscat grape cultivars had intensive aroma characteristics in terms of monoterpene content, but cv. Merlot had the lowest p-value, meaning it has higher quality attribute in terms of other quality attributes.