Food and Fermentation Industries >

2025 , Vol. 51 >Issue 8: 13 - 20

DOI: https://doi.org/10.13995/j.cnki.11-1802/ts.039313

Inhibitory effect of LED blue light on growth and aflatoxin production and its potential mechanism in Aspergillus flavus

  • SU Yaoyao ,
  • CHEN Kewei ,
  • DU Muying ,
  • KAN Jianquan
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  • 1(College of Food Science, Southwest University, Chongqing 400715, China)
    2(Laboratory of Quality & Safety Risk Assessment for Agro-products on Storage and Preservation (Chongqing), Ministry of Agriculture and Rural Affairs, Chongqing 400715, China)
    3(Chinese-Hungarian Cooperative Research Centre for Food Science, Chongqing 400715, China)
    4(Chongqing Key Laboratory of Speciality Food Co-Built by Sichuan and Chongqing, Chongqing 400715, China)

Received date: 2024-03-22

  Revised date: 2024-04-24

  Online published: 2025-05-28

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Abstract

Due to improper processing and storage methods, aflatoxins (AFs) contamination in dried red chilies has become a significant concern in China and Hungary.This study aimed to investigate LED blue light as an effective method for controlling the growth and toxicity of Aspergillus flavus in dried red chilies.Results showed that exposure to 100 μmol/(m2·s) LED blue light effectively inhibited mycelial growth and AFs production of A.flavus in vitro and in dried red chilies.Microscopy and scanning electron microscopy revealed that LED blue light significantly suppressed spore germination and disrupted the mycelial structure.Propidium iodide (PI) fluorescence staining and conductivity tests indicated that LED blue light led to cell membrane destruction, increasing permeability.Furthermore, LED blue light promoted the accumulation of reactive oxygen species (ROS) and oxidative stress, decreased superoxide dismutase (SOD) activity, catalase (CAT) activity and glutathione (GSH) content, and disrupted the balance of the antioxidant defense system.Quality assessment of dried red chilies treated with LED blue light showed that LED blue light had less effect on color, total phenol content, and antioxidant activity.These results suggested that LED blue light displayed great potential to be used as an effective tool for reducing AFs contamination during dried red chili storage, and provided insights into using physical methods for preventing and controlling AFs contamination in crops.

Key words： blue LED light; Aspergillus flavus; aflatoxins; antimicrobial activity; dried red pepper

Cite this article

SU Yaoyao , CHEN Kewei , DU Muying , KAN Jianquan . Inhibitory effect of LED blue light on growth and aflatoxin production and its potential mechanism in Aspergillus flavus[J]. Food and Fermentation Industries, 2025 , 51(8) : 13 -20 . DOI: 10.13995/j.cnki.11-1802/ts.039313

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