Fig. 3. Triterpene contents in ‘Golden Delicious’, ‘Rugiada’ and ‘Smoothee’.

Data represent means and SD of three biological replicates each per sample (generated from a pool of skin tissues from six to nine different fruits). Significance was calculated according to one-way ANOVA of P < 0.05 per time point, where lowercase letters above bars result from the comparison of groups using Tukey’s test (for triterpenes a to j). Groups connected by the same letter are not significantly different. Data are expressed in µg per mg of freeze-dried weight. Values at 20 and 31 DAFB are expressed per mg of total fruit and not skin, as the fruits were too small at this stage to peel them consistently