壳聚糖-香薷精油可食涂膜对樱桃的保鲜效果研究

Preservation Effect of Chitosan-Elsholtzia Ciliata Essential Oil Coating on Cherries

中文关键词:  香薷精油  壳聚糖  樱桃  保鲜

英文关键词:Elsholtzia ciliata essential oil  chitosan  cherry  preservation

中文摘要:

      目的 减少樱桃在贮藏过程中腐烂所造成的经济损失，并延长樱桃收获后的保质期。方法 采用涂抹法将壳聚糖-香薷精油涂膜液应用于樱桃保鲜，通过测定不同精油浓度下樱桃品质的变化，如质量损失率、pH、多酚氧化酶活性等指标，探究它对樱桃的保鲜效果。结果 添加了香薷精油的壳聚糖涂膜液，在樱桃保鲜方面具有较好的效果，可以有效延长樱桃的货架期。其中，添加了质量分数为2%香薷精油的实验组的保鲜效果最优，与空白对照组相比，其质量损失率降低了57.6%，樱桃的硬度保持良好，pH值提高了56.6%，樱桃中的过氧化物酶活性提高了8.8%，多酚氧化酶活性降低了28.7%。结论 采用壳聚糖-香薷精油制备的涂膜液有助于减少樱桃产业在樱桃采后贮藏中的经济损失，同时为天然保鲜材料的研发提供了理论依据。

英文摘要:

      The work aims to diminish the economic losses incurred due to cherry decay during storage and to prolong the post-harvest shelf life of cherries. The chitosan-Elsholtzia ciliata essential oil coating liquid was applied to cherry preservation. By measuring the change of cherry quality under different essential oil concentrations, such as weight rate, pH value, polyphenol oxidase activity and other indicators, the preservation effect on cherries was explored. The chitosan coating liquid added with Elsholtzia ciliata essential oil had a good preservation effect on cherries and could effectively extend the shelf life of cherries. The experimental group added with 2% Elsholtzia ciliata essential oil had the optimal the preservation effect. Compared with the blank control group, the weight loss rate was reduced by 57.6%, the cherry hardness remained well, the pH values increased by 56.6%, the peroxidase activity increased by 8.8%, and the polyphenols oxidase activity decreased by 28.7%. The coating liquid prepared from chitosan-Elsholtzia ciliata essential oil helps to reduce the economic losses of the cherry industry in post-harvest storage of cherries, which also provides a theoretical basis for the research and development of natural preservation materials.