Influence of different packaging materials in the raspberries quality supply chain.

The quality of fruits depend mostly, on packaging materials. We evaluated one commercial polypropylene macro-perforated film (6 mm holes) film (F1) and two non commercial biodegradable and compostable films (F2 and F3) with four baskets materials (polyethylene terephthalate, polylactic acid, cardboard and bagasse) to storage raspberries cv. Grandeaur® for up to 13 days (5 days at 1±1°C and 8 days at 20±1°C). The modified atmosphere packaging (MAP) and the quality of stored raspberries were evaluated monitoring respectively the headspace gas composition, the weight loss, the colour, the soluble solids content (SSC) and the titratable acidity (TA). The F2 and F3 film have modified the CO2 and O2 kPa in the packages, which depended on both the respiration of the berries and the permeability of the films. The effect of the storage and the packaging materials on the weight loss evolution wasn’t significant while the most sensitive parameter was the colour. Generally MAP conditions have determined an increasing of the SSC and the decreasing of the TA values but baskets in PLA wrapped with the non commercial biodegradable and compostable film (package PLA–F3) globally has best maintained the SSC values near to the harvest time keeping the fruits quality more attractive (9.68 °Brix and 37.22 L after 13 days).