NGHIÊN CỨU SỰ CHUYỂN HÓA SINH LÍ, HÓA SINH THEO TUỔI PHÁT TRIỂN CỦA QUẢ NA (Annona squamosa L.) TRỒNG TẠI THANH HÓA

Abstract

The paper presents the changes in physiological and biochemical indicators according to the age of development of custard apple fruit from the time they are formed until they enter the ripening stages. The content of chlorophyll in custard apple peel reaches the highest value at 13 weeks old and decreases rapidly when the fruit is 15 weeks old. The content of carotenoids is low from the early stage of development to 13 weeks old, then increases rapidly until the fruit is fully ripening. The content of vitamin C and reducing sugars increase continuously and reach the maximum value at 15 weeks old and then decrease slightly. The total organic acid content increases to 11 weeks old then decreases. Starch content gradually increases from the early stages and reaches its maximum at 13 weeks old, then decreases. The activity of - amylase in pulp fluctuates in line with the fluctuation of starch and reducing sugars according to the age of fruit development. Catalase activity increases and peaks at 13 weeks of age and then decreases. Peroxydaza activity increases continuously until the fruit ripens. Based on the results of the research, it was found that at the week of 15 the nutritional value of the fruit is the best, so custard apple fruit should be harvested at this time to ensure the nutritional value during storage.