壳寡糖处理对甜樱桃采后贮藏品质的影响

Effects of Chitosan Oligosaccharide Treatment on the Quality of Sweet Cherries After Harvest Storage

以甜樱桃为试材,采用浸泡的方法,研究了不同浓度壳寡糖溶液对甜樱桃贮藏期间的腐烂率、失重率、褐变指数等及与苯丙烷代谢相关多酚氧化酶、过氧化物酶、过氧化氢酶等酶活性的影响,以期为壳寡糖溶液在甜樱桃果实保鲜过程中的应用提供参考依据。结果表明:1.0%浓度的壳寡糖溶液降低了甜樱桃在贮藏期间的失重率与腐败率,延缓了褐变的发生以及可滴定酸、维生素C、总酚含量的下降,提高了多酚氧化酶、过氧化物酶、过氧化氢酶、超氧化物歧化酶的活性,抑制了丙二醛含量,降低了膜脂质过氧化水平。壳寡糖处理能有效防止甜樱桃果实的衰老褐变并提高苯丙烷代谢相关酶活性,增强甜樱桃采后果实的抗病能力。

Sweet cherry was used as test materials,soaking methods were used.The effects of different concentrations of chitosan oligosaccharide solution on decay rate,weight loss rate,browning index,etc.during storage of sweet cherries and the activities of polyphenol oxidase,peroxidase and catalase related to phenylpropane metabolism were investigated,in order to provide reference for the application of chito-oligosaccharide solution in the preservation process of sweet cherry fruit.The results showed that the 1.0%concentration of chitosan oligosaccharide solution reduced the weightlessness and decay rate of sweet cherries during storage,delayed the occurrence of browning and decreased the titratable acid content,vitamin C content and total phenol content,which showed that the activities of polyphenol oxidase,peroxidase,catalase and superoxide dismutase were increased,the malonaldehyde content was inhibited,and the peroxidation level of membrane lipids was reduced.Chitosan oligosaccharide treatment could effectively prevent the aging browning of sweet cherry fruit,improved the activity of enzymes related to phenylpropane metabolism,and enhanced the disease resistance of sweet cherry postharvest fruit.