Xanthan gum/hydroxypropyl methylcellulose/carbon quantum dots composite to enhance mango shelf life by triggering metacaspase-dependent apoptosis in Colletotrichum gloeosporioides

文献类型： 外文期刊

第一作者： Zheng, Meixia

作者： Zheng, Meixia;Feng, Jianwen;Su, Hailan;Lin, Fengfang;Zhu, Yujing;Chen, Meichun;Xiao, Rongfeng;Feng, Jianwen;Chen, Jianfu;Tan, Kok Bing

作者机构：

关键词： Food packaging; Carbon quantum dots; Antifungal

期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：8.5； 五年影响因子：8.7 ）

ISSN： 0141-8130

年卷期： 2025 年 311 卷

页码：

收录情况： SCI

摘要： Colletotrichum gloeosporioides, the primary fungal pathogen responsible for mango anthracnose, causes significant economic losses. Hence, we developed a xanthan gum/hydroxypropyl methylcellulose (XG/HPMC) film incorporating Dictyophora echinovolvata carbon quantum dots (DE-CQDs). These green-synthesized DE-CQDs are 2 nm spherical nanoparticles with good crystallinity and thermal stability, featuring functional groups such as -OH, -COOH, -NH4+, and -SO3H, which enhance hydrophilicity, solubility, and charge properties. The negative charge of DE-CQDs, as evidenced by zeta potential measurements, enhances their dispersibility and inhibits aggregation, thereby contributing to the film's augmented UV-blocking and water vapor transmission characteristics. DECQDs inhibit C. gloeosporioides growth through a unique mechanism, inducing metacaspase-dependent apoptosis and causing ROS accumulation without DNA fragmentation. When incorporated into the XHC film, DE-CQDs improve UV-blocking by 30 % at 400 nm, enhance water vapor transmission, and increase water contact angle. The XHC film significantly reduces mango decay (decay index: 0.35 +/- 0.05 to 0.21 +/- 0.05) and boosts vitamin C retention (from 30 % to 61 % over 7 days), effectively extending shelf life and preserving nutritional quality. Among the XHC films, XHC6 shows the best overall performance. Thus, DE-CQDs serve as functional fillers in biodegradable, environmentally friendly packaging films, offering a novel solution for mango disease prevention and control.

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