Control mechanisms of ε-polylysine and EDTA against Pectobacterium aroidearum isolated from rotted pickled red pepper fruits

文献类型： 外文期刊

第一作者： Yang, Shengbo

作者： Yang, Shengbo;Hu, Jingjing;Du, Yamin;Fu, Maorun;Yang, Shengbo;Hu, Jingjing;Du, Yamin;Fu, Maorun;Chen, Qingmin;Liu, Hu;Zhang, Zhanquan;Xin, Xiaofei

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关键词： Pectobacterium aroidearum; epsilon-Polylysine; Ethylenediaminetetraacetic acid disodium salt; Antibacterial mechanism; Biofilm biomass; Bacterial vitality

期刊名称：EUROPEAN FOOD RESEARCH AND TECHNOLOGY （ 影响因子：3.2； 五年影响因子：3.7 ）

ISSN： 1438-2377

年卷期： 2025 年

页码：

收录情况： SCI

摘要： Red pickled peppers are highly susceptible to soft rot after harvest, leading to significant economic losses. In this study, a bacterial strain associated with typical symptoms of soft rot was isolated from infected red pickled peppers. Through physiological and biochemical tests and 16 S rDNA sequence analysis, the strain was identified as Pectobacterium aroidearum (P. aroidearum), and the pathogenicity test of red pickled pepper was conducted to fulfill Koch's postulates. To control P. aroidearum, in vitro and in vivo antibacterial efficacy of twenty-two antibacterial agents were evaluated. The results showed that ethylenediaminetetraacetic acid disodium salt (EDTA-2Na) and epsilon-polylysine (epsilon-PL) at the concentration of 0.25 mg/mL had the most significant effect on inhibiting soft rot in red pickled peppers, and the rot rate decreased by 40.5% and 64%, respectively. Furthermore, EDTA-2Na and epsilon-PL significantly reduced the swarming motility and biofilm formation of P. aroidearum, and increased the leakage of cell membrane of P. aroidearum. This study systematically identified the pathogenic bacteria causing soft rot disease in red pickled peppers, and EDTA-2Na or epsilon-PL were demonstrated to control soft rot in red pickled pepper effectively, by inhibiting motility and biofilm biomass, and inducing lipid peroxidation of P. aroidearum.

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