Interaction of strains of non-toxigenic Aspergillus flavus with Aspergillus parasiticus on aflatoxin production

Authors

  • Hermínia Marina Martins Laboratório Nacional de Investigação Veterinária, Lisboa, Portugal
  • Maria Lígia Martins Laboratório Nacional de Investigação Veterinária, Lisboa, Portugal
  • Fernando Almeida Bernardo Polo Universitário da Ajuda, Faculdade de Medicina Veterinária, Lisboa, Portugal

DOI:

https://doi.org/10.1590/S1413-95962000000600003

Keywords:

Plant interaction, Aflatoxins, Vegetal production, Aspergillus flavus, Aspergillus parasiticus

Abstract

Aflatoxins production is affected by abiotic, biotic and genetic parameters. Eugenesic and dysgenetic condition for aflatoxinogenesis are relatively well studied, such as: the influence of temperature, pH, Aw, Oxigen tension, osmotic pression, organic and inorganic nutrients, substance with fungistatic effects: however there are relatively few knowledge about endogenous regulator mechanisms, the kinetic of the anabolism and the interaction between the productive moulds and remaining microflora holding in eutrophying substrates. The main objective of this study is to evaluate biotic interaction between five indigenous strains of A. flavus, confirmed non-toxigenic, and a productive strain (A. parasiticus ATCC 15 517), cultured simultaneously on two substrates: one natural (cracked corn) and a synthetic one, modified Czapeck-Dox broth. Aflatoxins quantifications were performed by HPLC at 8th and 12th days. Results of those interactive cultures showed that all strains were synergic, increasing aflatoxins production in a range between 5.6 and 106.5% over the control values, with an exception registered on one of the strains cultured in cracked corn at the 12th day, where the production decreased (-7.6%).

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Published

2000-12-01

How to Cite

Martins, H. M., Martins, M. L., & Bernardo, F. A. (2000). Interaction of strains of non-toxigenic Aspergillus flavus with Aspergillus parasiticus on aflatoxin production. Brazilian Journal of Veterinary Research and Animal Science, 37(6), 439-443. https://doi.org/10.1590/S1413-95962000000600003

Issue

Section

BASIC SCIENCES