Fig. 1. Anthocyanin concentration (a) and PAL activity (b) in apple peels during color formation at the two habitats.
MS, YS, MGD, and YGD represent Maoxian ‘Starkrimson’, Ya’an ‘Starkrimson’, Maoxian ‘Golden Delicious’,
and Ya’an ‘Golden Delicious’, respectively. Error bars indicate the standard errors of the means.