Influência da atmosfera modificada por filmes plásticos sobre a qualidade do mamão armazenado sob refrigeração

Abstract

The use of plastic packaging is an important tool for storing fruit. The aim of this work is to evaluate the effect of plastic film, Xtend® and PEBD on preserving papaya. Papaya fruit cv "Golden", showing 10 to 15% of yellowish peel and also having had chemical and thermal treatments, were wrapped individually in film and stored for 32 days at 10°C (90-95% UR). Fruit without packaging served as a control. Throughout the storage period, the characteristics of mass loss, firmness, total soluble solids, titratable acidity, pH, SST/AT ratio and the relative amount of CO2 inside the packaging were evaluated. Results showed that fruit wrapped in Xtend® film presented lower CO2 accumulation than those stored in PEBD film. However, the mass loss was minimized by using PEBD film, also avoiding wrinkles on the surface of the fruit up to 32 days of storage at 10°C. Both types of film suppressed the SST and organic acid accumulation in the fruit at the end of storage. The papaya wrapped in Xtend® film presented a higher SST/AT ratio due to the final lower acidity and SST concentration.