摘要
为研究壳聚糖-纳米氧化锌复合涂膜对甜樱桃贮藏期生理及品质的影响,以新鲜大连甜樱桃为材料,研究4℃条件下3种壳聚糖-纳米氧化锌复合涂膜处理(0.1%纳米氧化锌+0.2%壳聚糖、0.1%纳米氧化锌+0.5%壳聚糖、0.1%纳米氧化锌+0.8%壳聚糖)对甜樱桃的腐烂率、失重率、可溶性固形物、可滴定酸、维生素C(Vc)含量、呼吸强度、过氧化物酶(POD)活性、过氧化氢酶(CAT)活性、超氧化物歧化酶(SOD)活性和丙二醛(MDA)含量变化的影响。结果表明,0.1%纳米氧化锌+0.8%壳聚糖复配的壳聚糖-纳米氧化锌涂膜处理对甜樱桃果实的保鲜效果优于壳聚糖单膜处理(1.0%壳聚糖)。壳聚糖-纳米氧化锌复合涂膜处理能够使可溶性固形物、可滴定酸、Vc含量维持在较高水平,降低果实的腐烂率、失重率,有效延缓呼吸强度、MDA含量的上升及CAT活性的下降,抑制POD和SOD活性。在维持甜樱桃贮藏品质和延缓衰老方面,以0.1%纳米氧化锌+0.8%壳聚糖复配的壳聚糖-纳米氧化锌复合膜处理的保鲜效果最好。本研究结果为改性壳聚糖涂膜在甜樱桃贮藏保鲜中的应用提供了理论依据。
Experiments were carried out to investigated the combined effect of chitosan-nano-zinc oxide （ ZnO ） composite coating on the postharvest quality of sweet cherry （Prunus avium L. ）. Fruits stored at 4℃ were treated with 0.2% , 0.5% , or 0.8% of chitosan coating comprised of 0.1% nano-ZnO, respectively. The changes of different quality parameters including rotten rate, weight loss rate, total soluble solids, titratable acid, vitamin C （Vc） content, respiration intensity, peroxidase （POD）, catalase （CAT）, superoxide dismutase （SOD） and malondialdehyde （MDA） during storage were determined. The results showed that coating sweet cherries with a mixture of 0. 8% chitosan and 0. 1% nano-ZnO showed a better postharvest quality than fruits treated only with ehitosan （1.0% chitosan）. Specifically, composited chitosan coating treatment could keep titratable acid, total soluble solids and Vc contents at higher levels, reduce rotten rate and weight lose rate. In addition, respiration rate, MDA accumulation, decreasing of CAT were delayed, enzyme activities of POD and SOD were inhibited under composited chitosan coating treatment. It was concluded that the composited chitosan coating, consisting of 0.8% chitosan and 0. 1% nano-ZnO, showed the best performance in term of maintaining fruit freshness and delaying fruit ripen process. This study will provide a theoretical basis for the application of a modified chitosan based-coating in preservation of sweet cherry fruit,
出处
《核农学报》
CAS
CSCD
北大核心
2017年第9期1767-1774,共8页
Journal of Nuclear Agricultural Sciences
基金
浙江省教育厅一般科研项目(Y201737463)
浙江农林大学暨阳学院2014年人才启动项目(JY2014RC009)
浙江省食品科学与工程重中之重一级学科2014年开放基金项目(JYTsp20142101)
关键词
甜樱桃
壳聚糖
纳米氧化锌
复合涂膜
品质
sweet cherry, chitosan, nano zinc oxide, composited coating, quality
