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Article

Selection of Atoxigenic Aspergillus flavus for Potential Use in Aflatoxin Prevention in Shandong Province, China

1
School of Food Science and Engineering, Ocean University of China, Qingdao 266003, China
2
Food Technology Department, Wageningen University & Research, 6700 AK Wageningen, The Netherlands
*
Author to whom correspondence should be addressed.
Academic Editors: Pooja Bhatnagar-Mathur and Julio Alberto Zygadlo
J. Fungi 2021, 7(9), 773; https://doi.org/10.3390/jof7090773
Received: 4 June 2021 / Revised: 13 August 2021 / Accepted: 13 September 2021 / Published: 18 September 2021
Aspergillus flavus is a common filamentous fungus widely present in the soil, air, and in crops. This facultative pathogen of both animals and plants produces aflatoxins, a group of mycotoxins with strong teratogenic and carcinogenic properties. Peanuts are highly susceptible to aflatoxin contamination and consumption of contaminated peanuts poses serious threats to the health of humans and domestic animals. Currently, the competitive displacement of aflatoxin-producers from agricultural environments by atoxigenic A. flavus is the most effective method of preventing crop aflatoxin contamination. In the current study, 47 isolates of A. flavus collected from peanut samples originating in Shandong Province were characterized with molecular methods and for aflatoxin-producing ability in laboratory studies. Isolates PA04 and PA10 were found to be atoxigenic members of the L strains morphotype. When co-inoculated with A. flavus NRRL3357 at ratios of 1:10, 1:1, and 10:1 (PA04/PA10: NRRL3357), both atoxigenic strains were able to reduce aflatoxin B1 (AFB1) levels, on both culture media and peanut kernels, by up to 90%. The extent to which atoxigenic strains reduced contamination was correlated with the inoculation ratio. Abilities to compete of PA04 and PA10 were also independently verified against local aflatoxin-producer PA37. The results suggest that the two identified atoxigenic strains are good candidates for active ingredients of biocontrol products for the prevention of aflatoxin contamination of peanuts in Shandong Province. View Full-Text
Keywords: atoxigenic strains; Aspergillus flavus; aflatoxin contamination; competitive inhibition atoxigenic strains; Aspergillus flavus; aflatoxin contamination; competitive inhibition
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MDPI and ACS Style

Xu, J.; Wang, P.; Zhou, Z.; Cotty, P.J.; Kong, Q. Selection of Atoxigenic Aspergillus flavus for Potential Use in Aflatoxin Prevention in Shandong Province, China. J. Fungi 2021, 7, 773. https://doi.org/10.3390/jof7090773

AMA Style

Xu J, Wang P, Zhou Z, Cotty PJ, Kong Q. Selection of Atoxigenic Aspergillus flavus for Potential Use in Aflatoxin Prevention in Shandong Province, China. Journal of Fungi. 2021; 7(9):773. https://doi.org/10.3390/jof7090773

Chicago/Turabian Style

Xu, Jia, Peng Wang, Zehua Zhou, Peter J. Cotty, and Qing Kong. 2021. "Selection of Atoxigenic Aspergillus flavus for Potential Use in Aflatoxin Prevention in Shandong Province, China" Journal of Fungi 7, no. 9: 773. https://doi.org/10.3390/jof7090773

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