College of Food Science, Sichuan Agricultural University, Ya'an 625014, China.
College of Agriculture and Forestry Science and Technology, Chongqing Three Gorges Vocational College, Chongqing 404100, China.
Food Chem. 2025 Jan 15;463(Pt 2):141347. doi: 10.1016/j.foodchem.2024.141347. Epub 2024 Sep 17.
In order to protect the anthocyanins in blueberries during low-temperature storage, TMs/KGM/LAG (TKL) coatings were developed by composite thymol/β-cyclodextrin (β-CD) microcapsules (TMs), konjac glucomannan (KGM), and low acyl gellan gum (LAG). The results showed that the TMs prolonged the release of thymol for at least 30 d. The TKL was effective in maintaining the color of blueberry skin by regulating the activities of key enzymes for anthocyanin synthesis and degradation. Among the different treatment groups, TKL60 (thymol concentration of 60 mg/L) was the most effective in protecting anthocyanin. At 42 d of storage, the TKL60 group showed the highest anthocyanin levels of malvidin-3-O-galactoside (718.38 μg/g), delphinidin-3-O-galactoside (343.75 μg/g) and cyanidin-3-O-galactoside (40.67 μg/g). In addition, TKL60 treatment still showed good maintain the qualities of blueberries (weight loss, decay, hardness and TSS). Thus, this study provides a new approach to protect anthocyanin in blueberries after harvest during low-temperature storage.
为了在低温贮藏过程中保护蓝莓中的花色苷，开发了由复合百里香酚/β-环糊精（β-CD）微胶囊（TMs）、魔芋葡甘聚糖（KGM）和低酰基结冷胶（LAG）组成的 TMs/KGM/LAG（TKL）涂层。结果表明，TMs 至少可以延长百里香酚的释放 30 d。TKL 通过调节花色苷合成和降解关键酶的活性，有效地保持了蓝莓果皮的颜色。在不同处理组中，TKL60（百里香酚浓度为 60 mg/L）在保护花色苷方面最为有效。在贮藏 42 d 时，TKL60 组的矢车菊素-3-O-半乳糖苷（718.38 μg/g）、飞燕草素-3-O-半乳糖苷（343.75 μg/g）和天竺葵素-3-O-半乳糖苷（40.67 μg/g）含量最高。此外，TKL60 处理仍能很好地保持蓝莓的品质（失重、腐烂、硬度和 TSS）。因此，本研究为低温贮藏后收获的蓝莓中花色苷的保护提供了一种新方法。
