Modified atmosphere packaging improves flavor and postharvest quality of strawberry tomatoes

This study evaluated the effects of modified atmosphere packaging (MAP) on green shoulder retention, flavor, and quality of mature green strawberry tomatoes during postharvest shelf life. Initially, three packaging materials—polyethylene (PE), polylactic acid (PLA), and a PLA+PBAT composite—were tested under simulated storage conditions at 16 ± 1 °C. Gas composition, sensory attributes, and reddening index were analyzed.

Based on these findings, further experiments focused on different PE thicknesses (PE60, PE80, and PE100) and their effects on quality, physiological changes, and pigment metabolism. All materials delayed ripening compared to the control, although PLA and PLA+PBAT caused off-flavors, leading to the selection of PE for further testing.

PE60, PE80, and PE100 delayed ripening by 4, 6, and 8 days respectively, compared to 2 days in the control. However, PE100 caused gas injury and fruit softening due to excessive ethanol accumulation. In terms of shelf life, characteristic flavor was maintained up to day 8 in PE80-packaged tomatoes.

Additionally, soluble sugar and ascorbic acid contents were higher in PE80 compared to the control and PE60. The gas composition in this treatment was approximately 7 % O₂ and 8 % CO₂. Therefore, using PE80 or similar atmospheric conditions effectively extends the postharvest shelf life of strawberry tomatoes.

Source

Zhiying, X., Ran, Y., Qingmin, C., Qingqing, L., Yan, Y., Maorun, F., & Xiaofei, X. (n.d.).
The retention of green shoulders regulatory effects of modified atmosphere packaging on postharvest ripening and flavor quality in strawberry tomatoes. ScienceDirect.

https://www.sciencedirect.com/science/article/pii/S0304423826002049