Modified atmosphere packaging (MAP) is the procedure to changing the internal atmosphere package composition for maintaining fruit quality and extending its shelf life. So, this work was carried out throughout 2021 and 2022 seasons on “Triumph" persimmon fruits to evaluate the effectiveness of packaging using three thicknesses of low-density polyethylene (LDPE) bags (2, 4 and 7 µm) with or without carbon dioxide (CO2) treatment. Carbon dioxide gas at 100% was injected into the bags for replacing all of the normal air for every thickness polyethylene bags, and comparison with fruits packed in these bags of different thicknesses without carbon dioxide injection. Physical and chemical fruit properties were evaluated periodically after storage periods at 0ºC with 85-90% relative humidity (RH) and 7 days ripening at 20ºC with 80-85% (RH). The obtained results demonstrated that all parameters under investigation were positively impacted by the various treatments.

The results showed that after 45 days of storage at 0°C and 7 days ripening at 20°C, fruits packed in LDPE bags at thickness 7μm with 100 % CO2 application were more effective than other thicknesses under the same conditions in maintaining fruit firmness and reducing fruit weight loss and respiratory rate. Also, this treatment recorded the highest values of Lightness (L*), ascorbic acid content, soluble solid content, and total phenols content, and the lowest values of Chroma (C*), total acidity, and total tannins content in “Triumph" persimmon fruits.

It can be recommended that the highest thickness 7 μm of low-density polyethylene (LDPE) packaging bags with CO2 (100%) treatment are the most effective implementation for modified atmosphere packaging of “Triumph" fruits cv. persimmon for maintaining quality and extending shelf life.