THE IN VITRO ANTAGONISTIC EFFECTS OF SOME BACILLUS SPP. ON THE GROWTH AND MYCOTOXIN PRODUCTION OF TOXIGENIC ASPERGILLI

Authors

  • Miroslava Hlebová
  • Viktória Uzsáková
  • Ivana Charousová
  • Lukas Hleba

DOI:

https://doi.org/10.15414/jmbfs.5412

Keywords:

antagonistic activity, Bacillus spp., direct contact, mycotoxins, toxigenic aspergilli, volatiles

Abstract

This study aimed to investigate the antagonistic effect of three strains of the genus Bacillus on toxigenic fungi contaminating food commodities, with emphasis on two ochratoxigenic isolates (A. ochraceus, A. westerdijkiae) and two aflatoxigenic isolates (A. flavus and A. parasiticus). In vitro studies were carried out using two different methods for cultivation tested bacilli with fungal isolates – coincubation and dual culture method. The most sensitive isolate was A. ochraceus by both used methods. B. mycoides (5.72 ± 6.4 mm) and B. subtilis (5.08 ± 2.84 mm) were able to inhibit its growth and sporulation during ten days of cultivation (both inhibited the sporulation of A. ochraceus 100%) in coincubation. The most effective in the dual culture method were B. subtilis and B. thuringiensis against A. ochraceus (growth inhibition rate 84.40%; 90.55%) and A. flavus (growth inhibition rate 91.54%; 92.43%). The most effective sporulation inhibitors were B. subtilis and B. thuringiensis, which completely inhibited the sporulation of A. ochraceus and A. parasiticus after ten days of coincubation. Likewise, all tested bacterial strains showed complete inhibition of ochratoxin A synthesis in A. ochraceus and A. westerdijkiae exposure to bacterial volatiles. So, the current study illustrated that strains of the genus Bacillus could significantly inhibit the growth, sporulation, and mycotoxin production of toxigenic aspergilli and showing the great potential as a biocontrol agent of pre- and post-harvest food diseases caused by microscopic filamentous fungi.

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Published

2021-10-13

How to Cite

Hlebová, M. ., Uzsáková, V. ., Charousová, I. ., & Hleba, L. (2021). THE IN VITRO ANTAGONISTIC EFFECTS OF SOME BACILLUS SPP. ON THE GROWTH AND MYCOTOXIN PRODUCTION OF TOXIGENIC ASPERGILLI. Journal of Microbiology, Biotechnology and Food Sciences, e5412. https://doi.org/10.15414/jmbfs.5412

Issue

Section

Microbiology
Received 2021-10-13
Online Published 2021-10-13

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