M.Sc. Tezi Görüntüleme

       The purpose of this work was to study the effect of maturation and ripening on nutrient contents in different parts (skin, flesh and seed) of Kokulu grape (Vitis labrusca L.) fruit, which grows naturally in north-east of Turkey. We analyzed and quantified soluble sugars, organic acids, fatty acids and mineral contents combined with fruit characteristics such as pH and titratable acidity through six stages of fruit maturation and ripening. The predominant sugar was fructose (average 6437,27 mg/100 g fresh weight) in the skin, and the predominant organic acid was malic acid in the flesh (461,18 mg/100g fresh weight). The major saturated fatty acid was palmitic acid (C16:0) in the flesh (11,13%) and in the seed (9,08%), while the major unsaturated fatty acid was linoleic acid (C18:2) in the flesh (13,83%), and in the seed (68,07%). In addition, the highest average mineral content was K (average 1970 mg/100g) in the skin and the lowest average mineral content was Mn (average 0,24 mg/100g) in the pulp during maturation and ripening. Our findings reveal that the nutrient composition of Kokulu grape is of significant importance to daily diet and for industrial purposes.