Optimized precooling combined with SO2-released paper treatment improves the storability of longan (Dimocarpus longanLour.) fruits stored at room temperature

文献类型： 外文期刊

第一作者： Han, Dongmei

作者： Han, Dongmei;Li, Jianguang;Wang, Jing;Pan, Xuewen;Luo, Tao;Zhang, Lu;Wu, Jiaqi;Wu, Huitao;Wu, Zhenxian;Wu, Zhenxian

作者机构：

关键词： Longan (Dimocarpus longan Lour.) fruit; orthogonal test; postharvest performance; pre-cooling; SO2-released paper

期刊名称：FOOD SCIENCE & NUTRITION （ 影响因子：2.863； 五年影响因子：3.141 ）

ISSN： 2048-7177

年卷期： 2020 年 8 卷 6 期

页码：

收录情况： SCI

摘要： Precooling and sulfur dioxide fumigation were proved as effective methods for the preservation of longan (Dimocarpus longanLour.) fruits. However, inadequate precooling and sulfur dioxide fumigation resulted in unexpected losses and short shelf life. A L-9(3(4)) orthogonal test was conducted to screen out ideal dosage of sodium metabisulfite (factor A), precooling method (factor B), and precooling duration (factor C) to improve the storability of longan fruit stored for 48 hr at room temperature (RT) (25celcius). The overall qualities of all of the treated longan fruits after a 48-hr storage (OQST) and during the 5-day shelf at 25celcius (OQSF) were better than those of the control fruits. The treated fruits showed brighter fresh color (higher L*, b*, C*, and h degrees values but lower a* value), higher flavonoid, and chlorophyll contents. Moreover, the SO(2)residue was concentrated in pericarp but little in aril for any of the 12 treatments. The multivariate variance analysis showed that factor A was dominant to determine both of the OQST and OQSF, while factor B affected the OQST, and factor C affected the OQSF. In total, "0.22% sodium metabisulfite + 4 hr precooling + uncovered precooling" was considered to be an ideal treatment. These results would contribute to improving longan postharvest preservation technology.

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