CHANGES OF PROTEIN COMPOSITIONS IN POSTHARVEST LONGAN FRUIT

The changes in composition of proteins in pericarp and flesh in the longan (Dimocarpus longan Lour. cv. Fuyan) were studied with an aim to discuss the relationship between proteomic and senescence. The protein was separated by SDS-PAGE and Native-PAGE. The results showed that fruit proteins tend to degrade consistently. The degradation accelerated on the 5^th day and the 6^th day after harvest. Fruits began to rot mostly before protein degradation took place. The senescence and rot were largely accompanied by protein degradation. Degradation in flesh proteins was 2 days later than pericarp. The flesh degradation level was less than that of pericarp.