Efficacy of Corn and Rice Seed-borne Mycoflora in Controlling Aflatoxigenic Aspergillus flavus

  • Adel K. Madbouly Ain Shams University, Abbassia, Cairo, Egypt & Tabuk University, Tabuk, Saudi Arabia
  • Mohamed I.M. Ibrahim National Research center, Dokki, Cairo, Egypt
  • Mosaad Attia Abdel-Wahhab National Research Center, Dokki, Cairo, Egypt
Keywords: Biocontrol, cereals, mycoflora, Aspergillus flavus, aflatoxins, biopreservative

Abstract

Food commodities such as cereals are subjected to spoilage and bio-deterioration during storage by mycotoxigenic fungi such as Aspergillus flavus. Efforts are done to biologically control toxigenic A. flavus and subsequently prevent or at least minimize its aflatoxin production ability, without the need of using synthetic fungicides. Antifungal activity of corn and rice seed-borne mycoflora was tested against aflatoxigenic A. flavus in vitro, using bioassays such as dual culture technique; ability to produce volatile and non-volatile metabolites; ability to inhibit germination and reduce germ tube length of A. flavus conidia; in vivo reduction of aflatoxins level in corn seeds co-inoculated with the pathogen and antagonists. Penicillum crustosum, Aspergillus giganteus, Fusarium verticillioides and Aspergillus fumigatus isolates showed promising antifungal activities and varying efficiencies of reducing aflatoxins level; however, only A. fumigatus isolate was non-aflatoxigenic. It could be concluded that A. fumigatus could be used effectively as a biopreservative to increase shelf life of cereals during storage, but after testing its tendency to produce other mycotoxins or causing human Aspergillosis.

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Author Biographies

Adel K. Madbouly, Ain Shams University, Abbassia, Cairo, Egypt & Tabuk University, Tabuk, Saudi Arabia
Microbiology Department, Faculty of Science & Biology Department,Faculty of Science
Mohamed I.M. Ibrahim, National Research center, Dokki, Cairo, Egypt
Food Toxicology & Contaminants Dept
Mosaad Attia Abdel-Wahhab, National Research Center, Dokki, Cairo, Egypt
Food Toxicology & Contamiants Dept.
Published
30-06-2014
How to Cite
Madbouly, A. K., Ibrahim, M. I., & Abdel-Wahhab, M. A. (2014). Efficacy of Corn and Rice Seed-borne Mycoflora in Controlling Aflatoxigenic Aspergillus flavus. Comunicata Scientiae, 5(2), 118-130. https://doi.org/10.14295/cs.v5i2.284
Section
Original Article