数字农科院2.0

Low frequency polarized electric field inhibits enzymatic browning in fresh-cut taro via dual regulation of carbohydrate metabolism and ROS scavenging systems

文献类型： 外文期刊

作者： Jie Zhu;Tianyu Ge;Linyu Nian;Yan Liu;Youyi Miao;Suilou Wang;Chongjiang Cao

作者机构：

关键词： Ascorbic acid;Carbohydrate metabolism;Fresh-cut taro root;Low frequency polarized electric field;Reactive oxygen species

期刊名称： Postharvest Biology and Technology

ISSN： 0925-5214

年卷期： 2025 年 230 卷

页码：

收录情况： SCIE（2025版）

摘要： This study investigated the antioxidant mechanism of low frequency polarized electric field (LFPEF) treatment through carbohydrate metabolism and ROS scavenging regulation in fresh-cut taro (Colocasia esculenta). Enzymatic and gene expression analyses revealed that LFPEF treatment maintained starch and sucrose reserves via upregulation of sucrose phosphate synthase (SPS), neutral invertase (NI), hexokinase (HK), glucose-6-phosphate dehydrogenase (G6PDH), and L-galactono-1,4-lactone dehydrogenase (GalLDH), along with increased activity of these enzymes. Concurrently, it suppressed starch degradation through reduced both the activities and expression levels of α-amylase (AMY) and sucrose synthase (SS). Moreover, the LFPEF treatment also elevated ascorbate-glutathione cycle components, increasing ascorbic acid (AsA) and glutathione (GSH) concentrations compared to the control. ROS scavenging system activation was evidenced by upregulated ascorbate peroxidase (APX), catalase (CAT), and glutathione reductase (GR) gene expression, corresponding to activity enhancement in APX, CAT, and GR. This dual regulatory mechanism effectively mitigated oxidative damage, reducing polyphenol oxidase (PPO) activity and inhibiting hydrogen peroxide (H₂O₂) accumulation relative to untreated samples. Overall results indicate that LFPEF is an effectively physical preservation method that delays browning by regulating carbohydrate metabolism and enhancing the ROS scavenging system in fresh-cut taro.

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