Effects of mycotoxins, aflatoxin B1 and deoxynivalenol, on the bioluminescence of Vibrio fischeri

Sarter Samira, Metayer Isabelle, Zakhia Nadine. 2008. Effects of mycotoxins, aflatoxin B1 and deoxynivalenol, on the bioluminescence of Vibrio fischeri. World Mycotoxin Journal, 1 (2) : 189-193.

Résumé : The effects of aflatoxin B1 and deoxynivalenol on the luminescence of Vibrio fischeri were investigated to determine the conditions of using the bioluminescence as an indirect means for mycotoxin detection. The culture of Vibrio fischeri showed that bioluminescence reached a peak after 12 hours of incubation at 25 °C and then decreased drastically. During the lag phase which lasted 6 hours, light emission decreased drastically for both the mycotoxin assays - aflatoxin B1 10 µg/ml and deoxynivalenol 20 µg/ml - and the corresponding controls. Distinct bioluminescence inhibition appeared after this period of minimal bioluminescence of the controls and started with the exponential phase of growth. The percentage of bioluminescence inhibition for both mycotoxins was determined after 3.5, 10, 15 and 25 hours of incubation. The bioluminescence of Vibrio fischeri was inhibited with aflatoxin B1 and enhanced with deoxynivalenol. Both effects were delayed and required a long-term incubation over 10 hours, which may help to investigate bioassays for mycotoxin detection.

Mots-clés Agrovoc : mycotoxine, aflatoxine, luminescence, Vibrio, identification, contamination biologique, test biologique

Mots-clés complémentaires : Bioluminescence

Classification Agris : Q03 - Contamination et toxicologie alimentaires

Champ stratégique Cirad : Axe 3 (2005-2013) - Alimentation accessible et de qualité

Auteurs et affiliations

• Sarter Samira, CIRAD-PERSYST-UMR Qualisud (MDG) ORCID: 0000-0001-5115-0824
• Metayer Isabelle, CIRAD-PERSYST-UMR Qualisud (FRA)
• Zakhia Nadine, CIRAD-DG-DSI (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/545033/)

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