Comparison of Shelf Quality of Different Treatments on the Blueberries
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Abstract:
By comparing the differences in low-temperature shelf quality after different treatments of blueberry ice storage, the best treatment of blueberry post-harvest preservation was explored. Using 'Legacy' blueberry as test material, the box-type modified atmosphere package (MAP), 1-methylcyclopropene (1-MCP), and the box-type modified atmosphere package combined with 1-methylcyclopropene (MAP+1-MCP) treatments were employed to study the impacts on blueberry quality indicators, physiological indicators, hardness and color. The results showed that the differential indicators among the treatments were anthocyanin and Vc by OPLS-DA analysis. At the 12th day of shelf life, the soluble solids content of blueberry fruits treated with MAP+1-MCP was 12.84%, the titratable acid content was 0.85%, the Vc content was 35.61 mg/100 g, the anthocyanin content was 87.51 mg/100g, and the hardness was 897.75 g. Compared with the control group, the respiration intensity and ethylene production rate for the MAP + 1-MCP treatment decreased by 13.32% and 28.27%, respectively. This showed that the MAP+1-MCP treatment could delay the decline of Vc, anthocyanin, and titratable acid content in fruits, slow down the decrease of blueberry fruit hardness, delay fruit softening, and also inhibit the increase of fruit respiration rate and ethylene production rate. But the effect of each treatment on the color of blueberry fruit was not significant. MAP+1-MCP was the best treatment for postharvest blueberry fruit, and the experimental results could be applied in the commercial sale of blueberries.
