Mechanism of Inhibiting the Growth and Aflatoxin B1 Biosynthesis of Aspergillus flavus by Phenyllactic Acid

被引：6

作者：

Zhao, Chi ^{[1
,2
]}

Penttinen, Petri ^{[1
,3
]}

Zhang, Lingzi ^{[1
]}

Dong, Ling ^{[2
]}

Zhang, Fengju ^{[2
]}

Li, Zhihua ^{[2
]}

Zhang, Xiaoping ^{[1
]}

机构：

[1] Sichuan Agr Univ, Coll Resources, 211 Huimin Rd, Chengdu 611130, Peoples R China

[2] Sichuan Acad Agr Sci, Inst Agroprod Proc Sci & Technol, 60 Shizishan Rd, Chengdu 610066, Peoples R China

[3] Univ Helsinki, Fac Agr & Forestry, Viikinkaari 1, Helsinki 00014, Finland

来源：

TOXINS | 2023年 / 15卷 / 06期

关键词：

phenyllactic acid; Aspergillus flavus; aflatoxin B-1; transcriptome; metabolome; LISTERIA-MONOCYTOGENES; ESCHERICHIA-COLI; ANTIBACTERIAL; TRANSCRIPTION; MYCOTOXINS; EXPRESSION;

D O I：

10.3390/toxins15060370

中图分类号：

TS2 [食品工业];

学科分类号：

0832 ;

摘要：

Phenyllactic acid (PLA), a promising food preservative, is safe and effective against a broad spectrum of food-borne pathogens. However, its mechanisms against toxigenic fungi are still poorly understood. In this study, we applied physicochemical, morphological, metabolomics, and transcriptomics analyses to investigate the activity and mechanism of PLA inhibition of a typical food-contaminating mold, Aspergillus flavus. The results showed that PLA effectively inhibited the growth of A. flavus spores and reduced aflatoxin B-1 (AFB(1)) production by downregulating key genes associated with AFB(1) biosynthesis. Propidium iodide staining and transmission electron microscopy analysis demonstrated a dose-dependent disruption of the integrity and morphology of the A. flavus spore cell membrane by PLA. Multi-omics analyses showed that subinhibitory concentrations of PLA induced significant changes in A. flavus spores at the transcriptional and metabolic levels, as 980 genes and 30 metabolites were differentially expressed. Moreover, KEGG pathway enrichment analysis indicated PLA-induced cell membrane damage, energy-metabolism disruption, and central-dogma abnormality in A. flavus spores. The results provided new insights into the anti-A. flavus and -AFB(1) mechanisms of PLA.

引用

页数：16

共 49 条

[1] Advances in Analysis and Detection of Major Mycotoxins in Foods [J].