Li Kexin, Guo Zhenlong, Wu Yi, Xu Hui, Jiang Juanjuan, Wu Haolin, Sun Changxia, Li Qiang
Department of Chemistry, College of Science, Beijing Forestry University, Beijing 100083, China; Beijing Key Laboratory of Forest Food Processing and Safety, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China.
Business Comprehensive Service Center, Baiguan Street, Shangyu District, Shaoxing City, Zhejiang 312399, China.
Int J Biol Macromol. 2025 Feb;291:138833. doi: 10.1016/j.ijbiomac.2024.138833. Epub 2024 Dec 19.
Fresh-cut fruit, with nutrition and convenience, has a broad market demand. However, its shelf life is shortened due to its tissue damage. Therefore, the development of cost-effective and eco-friendly multifunctional packaging materials to extend the shelf life of fresh-cut fruits is urgently needed. A cornstarch-based film (CS film) was successfully prepared using V-type corn starch as an ethylene scavenger and kiwifruit peel extract (KPE) as an antioxidant. The film containing 4.00 % (v/v) KPE had a DPPH radical scavenging capability of 52.1 % ± 2.4 % and ABTS radical scavenging capability of 70.4 % ± 4.4 %. The amount of ethylene harvested was 17.27 cm g. In addition, the malondialdehyde content of fresh-cut kiwifruits covered by CS film decreased by 42.82 % compared with PE film after 72 h, and the hardness increased 71.20 %. And the CS film could regulate ethylene and oxygen concentration, and extending the fresh life of kiwifruit from 3 days to 15 days. Metabolomics and transcriptomic analyses revealed that the CS film regulated ethylene self-promotion and the balance of reactive oxygen species metabolism. As a result, these reduced sugar synthesis and metabolism, which helped to maintain the freshness of fresh-cut kiwifruit. These findings can serve as a reference for developing techniques to preserve the packaging of fresh-cut fruits.
鲜切水果兼具营养与便利，市场需求广阔。然而，由于其组织受损，货架期缩短。因此，迫切需要开发具有成本效益且环保的多功能包装材料来延长鲜切水果的货架期。以V型玉米淀粉作为乙烯清除剂、猕猴桃果皮提取物（KPE）作为抗氧化剂，成功制备了一种玉米淀粉基薄膜（CS薄膜）。含有4.00%（v/v）KPE的薄膜对DPPH自由基的清除能力为52.1%±2.4%，对ABTS自由基的清除能力为70.4%±4.4%。乙烯采收量为17.27 cm g。此外，72小时后，CS薄膜覆盖的鲜切猕猴桃的丙二醛含量比PE薄膜降低了42.82%，硬度增加了71.20%。并且CS薄膜能够调节乙烯和氧气浓度，将猕猴桃的保鲜期从3天延长至15天。代谢组学和转录组学分析表明，CS薄膜调节了乙烯的自我促进以及活性氧代谢的平衡。结果，这些减少了糖的合成和代谢，有助于保持鲜切猕猴桃的新鲜度。这些发现可为开发鲜切水果包装保鲜技术提供参考。
