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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

作者： Han, Dongmei 1 ; Luo, Tao 2 ; Zhang, Lu 2 ; Wu, Jiaqi 2 ; Wu, Huitao 2 ; Wu, Zhenxian 2 ; Li, Jianguang 1 ; Wang, Jing 1 ; P 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Inst Fruit Tree Res,Minist Agr, Key Lab South Subtrop Fruit Biol & Genet Resource, Guangdong Prov Key Lab Trop & Subtrop Fruit Tree, Guangzhou, Peoples R China

2.South China Agr Univ, Coll Hort,Minist Educ, Guangdong Prov Key Lab Postharvest Sci Fruits & V, Engn Res Ctr Postharvest Technol Hort Crops South, Guangzhou, Peoples R China

3.Minist Agr, Guangdong Litchi Engn Res Ctr, Key Lab Biol & Genet Improvement Hort Crops South, Guangzhou, Peoples R China

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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