Opuntia ficus-indica L. Fruits Cold Storage Using Different Packaging Materials

Abstract

The prickly pear is a non-climacteric fruit and highly perishable. Therefore, it is crucial to find methods to extend its shelf life. The objective of this study was to evaluate the storage behavior of prickly pears under modified atmosphere conditions (2 °C, 90% RH) using different packaging materials (a cardboard box commercially used by the company, a rigid PET (polyethylene terephthalate) box, and a biodegradable plastic flexible bag). The fruits were produced in the Alentejo region and belong to a regional variety usually referred to as the “orange” variety. According to this study, the “orange” variety fruits could be stored at the specified temperature for 30 days. Among the storage methods tested, the biodegradable plastic bag was the most effective in maintaining the fruit’s quality throughout the entire period. The biodegradable package exhibited a weight loss lower than 5% for 30 days of storage, while the cardboard box showed great weight loss (>6%) and more fruit contamination by fungi. Fruit firmness also decreased during storage, going from 10.1 N to 4.35 N, with bigger losses happening in the PET box. Throughout the study, the fruit acidity remained stable with values of 0.03% and 0.02%.