EFFECTS OF FRUIT BAGGING WITH DIFFERENT TYPES OF BAGS ON COLOR FORMATION AND PIGMENT ACCUMULATION OF 'FUYU' PERSIMMON

To study effects of fruit bagging with different types of bags on color formation and pigment accumulation of ‘Fuyu’ persimmon, 7 types of bags were selected to bag ‘Fuyu’ persimmon on 25 June, and picked off by batches on 25 August, 10 and 20 September, 2, 12 and 25 October and 2 and 12 November. Non-bagged fruits were used as control and compared with treated fruits for color development and pigment accumulation. The results showed that in the early stage of fruit development, the treatment of double bag obviously depressed peel chlorophyll and accelerated chlorosis of the fruit surface; 2 October-2 November is the critical coloration period of ‘Fuyu’ persimmon, fruit color turned to orange, red orange, which is also the key stage of the influences of bagging on carotenoid content. Correlation between color a and pigment component were higher than color b; fruit color development was caused by accumulation of 5 kinds of carotenoids, especially cryptoxanthin and β-carotene. Red light and weak light are not conducive to pigment synthesis, which is more continuously to ‘red’ pigment.