Abstract
Grafting is used as a viable option for disease control in watermelon
 production; however, this process can affect quality parameters of the fruits.
 The aim of this study was to determine sugar, organic acid and volatile flavor
 compounds of grafted Crisby and Crimson Tide watermelon cultivars at 2 harvest
 times. In the study, the effect of two watermelon cultivars, three rootstocks
 and two harvesting time on some of the fruit quality characteristics were determined.
 Results showed that the quality parameters of samples varied based on the
 cultivar, rootstock and harvest time. The ranges for glucose, fructose and sucrose contents of fruits were 2.31-2.52%, 3.71-4.01%, 0.70-1.69%,
 respectively. Organic acids of the samples were composed of citric, acetic,
 malic, tartaric and oxalic acids and their respective ranges were 135.25-195.13
 mg/kg, 97.00-124.13 mg/kg, 67.50-151.50 mg/kg,
 61.00-85.38 mg/kg, 22.75-36.25 mg/kg. The main flavor components of samples were trans-2-nonenal, cis-6-nonen-1-ol, nonanal and
 6-methyl-5-hepten-2-one.
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