Characteristics of major fruit qualities development in blueberry

Fruit color is one of the major qualities of characteristics in blueberry,which is mainly determined by anthocyanin and flavonoid.Changes of anthocyanin,phenolics,sugars,flavonoid and PAL activity in blueberry during fruit development were researched,taking Bluecrop and Powderblue as materials.The results showed that the contents of anthocyanin were increased,but the contents of total phenolics and flavonoid were decreased as development of blueberry,and were increased slightly at the end of development.Blueberry fruit mainly accumulated hexose,and there was significantly positive correlation between anthocyanin and hexose(Bluecrop,r = 0.818*,r = 0.835**;Powderblue,r = 0.769*,r = 0.805*).The contents of anthocyanin,phenolics,sugars,flavonoid in Bluecrop was lower than those of Powderblue.The activity of PAL was not significant correlated with anthocyanin content,but was significantly positive correlation with changes of the contents of phenolics and flavonoid.