Physiological and biochemical changes in longan fruit (Dimocarpus longan Lour.) cultivated in Vietnam during growth and ripening

摘要

This paper presents research results on some physiological (pigments content) and biochemical indicators (reducingsugar content, starch, total organic acid, vitamin C, α-amylase enzyme, catalase enzyme, peroxidase enzyme) of longan fruitgrown in Vietnam during growth and ripening, thereby determining the physiological ripening time of the fruit (the mostappropriate time for fruit harvest). The results showed that significant changes occurred in pigments content, reducing sugarcontent, starch, total organic acid, vitamin C, protein, lipid, α-amylase enzyme, catalase enzyme, and peroxidase enzyme oflongan from formation to fruit ripening. Through the research process, it was observed that the longan achieved the bestquality to harvest when fruits were 19 weeks old. The results of this study provide important data for the harvesting andstorage of longan fruit.