3. Results3.1. Comparison of total flavonoids and CA levels in the peelsbetween two cultivarsFrom 14 to 125 DAFB in 2011, the levels of total flavonoids andCA in the peels from two apple cultivars changed along a sim-ilar pattern (Fig. 1). One peak appeared at about 30 DAFB, andthen declined to the minimum until fruit matures. The data indi-cated that the young fruits accumulated more flavonoids and CAin the peels than the mature ones in both cultivars. Compari-son between cultivars showed that the total flavonoids and CA in‘Feng Shuai’ were 35% and 80% higher respectively than those in‘Golden Delicious’ in the early half time (from 15 to 60 DAFB). How-ever, there were no significant differences in the total flavonoidsand CA between cultivars in the late half of fruit development.This suggested that the peels of non-russeted cultivar ‘Feng Shuai’contained more secondary metabolites than the russeted ‘GoldenDelicious’ during the young fruit stage.