Lipoic Acid Enhances the Defense Capability of Citrus Fruits to Blue Mold Caused by Penicillium italicum

文献类型： 外文期刊

第一作者： Lu, Zhihong

作者： Lu, Zhihong;Hong, Min;Wang, Rikui;Feng, Yu;He, Mingyang;Hong, Min;He, Mingyang;Cheng, Shiming

作者机构：

关键词： lipoic acid; citrus; Penicillium italicum; natural compound; defense capability

期刊名称：FOODS （ 影响因子：5.1； 五年影响因子：5.6 ）

ISSN：

年卷期： 2025 年 14 卷 6 期

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收录情况： SCI

摘要： Blue mold caused by Penicillium italicum (P. italicum) is a major postharvest disease in citrus fruits. Lipoic acid (LA) is a potent antioxidant with biological activity that was evaluated for its inhibitory effects on P. italicum and citrus blue mold using in vitro and in vivo experiments. The results demonstrated that LA effectively suppressed the mycelial growth and spore germination of P. italicum. LA increased hydrogen peroxide levels, compromising cell membrane integrity and leading to enhanced membrane permeability, as indicated by the increased relative conductivity and decreased protein and total sugar contents in P. italicum mycelia. Furthermore, LA delayed disease progression in citrus fruits infected with P. italicum through increasing total phenol and flavonoid contents and enhancing the activities of phenylalanine ammonia lyase, polyphenol oxidase, superoxide dismutase, and peroxidase in citrus peel. Overall, LA exhibited strong antifungal activity against P. italicum and improved citrus fruit resistance to blue mold, highlighting its potential as a natural postharvest disease control agent.

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