Table 2. Concentrations (μg/kg) of volatile compounds determined in the skin of table grapes.

Data are means (n = 3). The capital letters refer to the table grape cultivars listed in Fig. 1. The aroma compounds were listed on the left of the concentration arrays, and the colour scale was shown at the bottom. The higher concentration for each compound was presented in red; otherwise, green was used; -Indicated that the compound was not detected.