بررسي تاثير بسته بندي در اتمسفر تعديل يافته بر روي بافت و خصوصيات فيزيكوشيميايي سيب ايراني شفيع آبادي

The Effect of Modified Atmosphere Packaging (MAP) on Texture and Some Physiochemical Characteristics of Iranian Apple 1 Shall Abadiv

Ethylene as a plant hormone plays a major role in senescence, loss of fruit quality, and lowering of shelf life in apples, making the fruit unsuitable for consumption. Modified atmospheric packaging is the way that can control respiration rate of product through decrease in 02 along with increase in C02 levels. In order to maintain quality and increase the storage life of ʹShafi Abadiʹ apple, an experiment was conducted in split factorial design with four replications. Treatments consisted of three different storage temperatures (1, 4 and 25 °C); gas combinations of two levels (the first one 2% C02 - 3% 02 and the second one 4% C02 -1 % 02) along with two types of polymeric films (polyethylene and polypropylene). Tissue firmness, TSS, EC, pH, TA, TSS/TA, and rate of ethylene production were measured and estimated every 14 days. The results showed that ethylene production rate at 1°C was lower and the packed fruits under 1°C with gas combination of 1 % 02 - 4 % C02 and polypropylene film maintained TSS, TA, TSS/TA and tissue firmness as compared to other treatments. pH and TSS/TA of fruits showed an increased trend and TSS, TA decreased as well through the storage of fruits. The changes in quality factors occurred with a slower rate than in controls. The results indicated that modified atmosphere packaging has led to extension of storability and retardation of softening rate in fruits as compared to control.