Changes of flesh pigment contents of blood-flesh peach during fruit development.

An experiment was conducted with blood-flesh peach,and white-flesh peach and yellow-flesh peach as control,to analyze the changes in the contents of pigments from 35 d after full bloom to muturity.The results showed that the content of chlorophyll a,the ratio of chlorophyll a to b and the content of chlorophyll were the highest at 35 d after full bloom,then decreased during fruit development,whereas the content of carotenoid was the lowest at early period,then increased later.The content of anthocyanin differed greatly in cultivars.At maturity,the content of anthocyanin was the highest in blood-flesh peach(0.48 mg/g) and the lowest in white-flesh peach(0.05 mg/g).The results of correlation analysis showed that in blood-flesh peach carotenoid content was significantly positively correlated with anthocyanin content,and chlorophyll a/b was remarkably negatively correlatied with anthocyanin content.Pigments of chlorophyll,carotenoid and anthocyanin coexist during fruit development,but with different ratios at different development stages.Carotenoids were main components in yellow-flesh peach,while anthocyanins in blood-flesh when the fruit was getting ripe.