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February 17, 2026Open Access

Mutations and Metabolic Factors Affecting Interaction of Toxigenic and Atoxigenic Aspergillus flavus

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Authors

SKSzilvia KovácsBBBarbara BrendzsákWPWalter P. Pfliegler

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Overview

Systematic analysis reveals genetic interactions affecting aflatoxin levels in Aspergillus flavus strains, suggesting novel identification strategies.

Key Points

  • This research aims to understand the genetic and metabolic factors influencing aflatoxin production by Aspergillus flavus.
  • Systematic analysis of A. flavus strains focusing on aflatoxin gene clusters and AFB1 production.
  • Identification of genetic mutations in key genes related to aflatoxin biosynthesis.
  • Comparison of morphological changes in co-cultured toxigenic and atoxigenic strains.
  • Measurement of spore concentration's effect on AFB1 production.
  • Atoxigenic strains exhibited intron losses and high-impact mutations, notably in aflL and aflLa genes.
  • Key genes norA/aflE, verA/aflN, and omtA/aflP were identified as mutation hotspots.
  • AFB1 production was inversely related to spore concentration, with fewer spores yielding higher toxin levels.
  • Morphological changes occurred in co-cultured strains, indicating interactions via diffusible molecules.

Cite This Study

Kovács et al. (2026) studied this question.

synapsesocial.com/papers/6994055d4e9c9e835dfd632chttps://doi.org/10.3390/microorganisms14020473
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