Cytokinin concentrations in the outer pericarp of developing kiwifruit: (a) iP, isopentenyl adenine; (b) iPR, isopentenyl adenine riboside; (c) tZ, trans-zeatin; (d) tZR, trans-zeatin riboside; (e) tZROG, trans-zeatin-O-glucoside; (f) DZR, dihydrozeatin riboside; (g) cZ, cis-zeatin; (h) cZR, cis-zeatin riboside.. Untreated control (black bar; vine standard), low carbohydrate supply (blue bar), and high carbohydrate supply (red bar). Values are averages ± SEM (n = 3 or 4). Statistical analysis by linear mixed effects model with type 3 sums of squares Kenward–Roger’s method; different letters mean a statistical difference adjusted for multiple comparison by Tukey’s correction (p < 0.05). Fruit age is in weeks after mid bloom (WAMB). FW, fresh weight.