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Effect of chitosan-based edible coating on antioxidants, antioxidant enzyme system, and postharvest fruit quality of strawberries (Fragaria x aranassa Duch.)

文献类型： 外文期刊

作者： Wang, Shiow Y. 1 ; Gao, Haiyan 2 ;

作者机构： 1.ARS, Genet Improvement Fruits & Vegetables Lab, Beltsville Agr Res Ctr, USDA, Beltsville, MD 20705 USA

2.ARS, Food Qual Lab, Beltsville Agr Res Ctr, USDA, Beltsville, MD 20705 USA

3.Zhejiang Acad Agr Sci, Inst Food Sci, Hangzhou 310021, Zhejiang, Peoples R China

关键词： Strawberries;Fragaria x ananassa;Chitosan;Antioxidants;Antioxidant enzymes;Free radicals;beta-1,3-Glucanase

期刊名称：LWT-FOOD SCIENCE AND TECHNOLOGY （ 影响因子：4.952； 五年影响因子：5.383 ）

ISSN： 0023-6438

年卷期： 2013 年 52 卷 2 期

页码：

收录情况： SCI

摘要： The severity of decay in strawberries stored at either 5 degrees C or 10 degrees C was significantly reduced and the shelf-life was extended by immersing fruits in chitosan solutions of 0.5, 1.0 and 1.5 g/100 mL for 5 min at 20 degrees C as compared to the control. Strawberries treated with chitosan also maintained better fruit quality with higher levels of phenolics, anthocyanins, flavonoids (ellagic acid, ellagic acid glucoside, p-coumaroyl glucose, quercetin 3-glucoside, quercetin 3-glucuronide, kaempferol 3-glucoside, kaempferol 3-glucuronide, cyanidin 3-glucoside, pelargonidin 3-glucoside, cyanidin 3-glucoside-succinate, and pelargonidin 3-glucoside-succinate), antioxidant enzyme activity [catalase (CAT), glutathione-peroxidase (GSH-POD), guaiacol peroxidase (G-POD), dehydroascorbate reductase (DHAR) and monodehydroascorbate reductase (MDAR)], and oxygen radical absorbance capacity for peroxyl radicals (ROO center dot), hydroxyl radical radicals ((OH)-O-center dot; HOSC) and 2,2-Di (4-tert-octylphenyl)-1-picrylhydrazyl (DPPH) than the untreated fruits. Chitosan treatments retarded the decrease of ascorbic acid (ASA) and reduced glutathione (GSH) content and beta-1,3-glucanase activities compared to control. The high contents of antioxidants, antioxidant activity, ASA and GSH and high activity of beta-1,3-glucanase in the treated strawberries reinforced the microbial defense mechanism of the fruit and accentuated the resistance against fungal invasion. Therefore, the application of chitosan coating could be favorable in extending shelf-life, maintaining quality and controlling decay of strawberries. Published by Elsevier Ltd.

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