壳聚糖处理对脐橙果实抗病性及贮藏品质的影响(英文)  

Effects of Chitosan Coating on Disease Resistance and Storage Quality of Navel Orange Fruit

作　　者：邓雨艳[1] 明建[1] 曾凯芳[1] 

机构地区：[1]西南大学食品科学学院,重庆400715

出　　处：《食品科学》2008年第11期656-661,共6页Food Science

基　　金：国家自然科学基金项目(30700556);"十一五"国家科技支撑计划项目(2006BAD22B03)

摘　　要：以脐橙果实(Citrussinensis L. osbeck)为试材,采收后用 2% 的壳聚糖溶液浸泡处理 1min,取出晾干,用青霉病菌(Penicillium italicum)孢子悬浮液对其进行损伤接种,贮存于 20℃,85%～95% 相对湿度条件下,研究壳聚糖对脐橙果实青霉病抗病性的影响。另外,采用不进行损伤接种的果实观察测定贮藏品质的变化。结果表明,接种后第 18d,2% 壳聚糖处理果实的接种发病率和病斑直径分别比对照果实低72.72% 和 90.19%。在果实贮藏过程中,2% 壳聚糖处理后的果实的总酚、类黄酮和可溶性蛋白含量一直高于对照果实。并且 2% 壳聚糖处理能延缓果实抗坏血酸、失重率、可溶性固形物、可滴定酸的含量的降低。说明 2% 壳聚糖处理能够抑制脐橙果实贮藏期中青霉病的发展,提高脐橙果实的抗病能力,延缓果实品质的下降。In order to understand how chitosan affects disease resistance and quality of navel orange fruit （Citrussinensis L. osbeck） cv. Newhall after harvest, navel orange fruits were treated with 2 g chitosan/100 g solution for 1 min, and some fruits were taken out, dried naturally and inoculated with Penicillium italicum. Then, the fruits were stored at 20 ℃ and 85% to 95% RH. Results indicated that the disease incidence and the lesion diameter in the chitosan-treated fruit are 72.72% and 90.19%, lower than those in control fruit on the 18^th day of incubation. The chitosan treatment maintains the soluble protein content, total phenolic and flavonoid level of navel orange fruit, which maybe involve in the maintenance of disease resistance of navel orange fruit. Treating navel orange fruit with 2 g chitosan/100 g solution effectively reduces the decrease in the content ofascorbic acid （AsA）, water, titratable acidity （TA） and total soluble solids （TSS）. These results suggested that the treatment with chitosan coating enhances the disease resistance and exhibits a potential for storage life extension of the navel orange fruit stored at ambient temperature.

关 键 词：壳聚糖 脐橙 果实 抗病性 品质 

分 类 号：S609.3[农业科学—园艺学] S666.4