POSTHARVEST PHYSIOLOGICAL CHANGES OF APPLE AND EFFECT OF POSTHARVEST TREATMENT ON ITS STORAGE QUALITY
Liu Yu;Jiao Xin-zhi;Qn Hong-bin;Liu Wen-yan;Xu Rong-jiang;Lin Jia-hua;Shi Jia-yao Shanghai Institute of Plant Physilolgy. Academia Sinica Shanghai Fruit Company
The respiration rate, ethylene production and firmness of the apple fruit (Var. Red Delicious, Starkipg Delicious, Ben Davis, White Winter Pearmain, Golden Delicious) were measured after harvest and during storage. It was found that after harvest the fruit ripened quickly, climacteric rise of respiration occurred, firmness and quality decreased, and above all, production of ethylene markedly increased. Treatment which depressed and or delayed the production of ethylene in fruit had a favorable effect on the keeping quality, it appeared that the produc- tion of ethylene in fruit was an indicator of ripeness. The results of experiments of various harvesting date and various time intervals before storage showed that to store the fruit as soon as it was harvested was of great importance for prolonging storage period and improving fruit quality. Postharvest treatments with CO_2. N_2 and vacuum showed favorable results in the control of fruit ripening. These results may serve as the basis of improveing the storage quality of the fruit in practice.