Aflatoxin-degrading Bacillus sp. strains degrade zearalenone and produce proteases, amylases and cellulases of agro-industrial interest

GONZÁLEZ PEREYRA, M.L.; DI GIACOMO, A.L.; LARA, A.L.; MARTÍNEZ, M.P.; CAVAGLIERI, L.

TOXICON

PERGAMON-ELSEVIER SCIENCE LTD

Año: 2020 vol. 180 p. 43 - 48

0041-0101

Zearalenone, an oestogenic mycotoxin produced by Fusarium sp., occurs naturally in agricultural commodities.Economic losses and health concerns associated to mycotoxins has attracted research interest towards exploringnovel approaches to detoxify mycotoxin-contaminated food and feed. The aim of the present work was to studythe ability of 11 aflatoxin-degrading Bacillus strains to degrade ZEA. In addition, a qualitative assessment ofprotease, amylase and cellulase activity of the studied Bacillus strains was made. All strains were able to degrade58?96.9% ZEA after 72 h. Toxicity towards Artemia salina was significantly reduced (P < 0.0001). Degradationextracts fluorescence decreased 50% indicating a probable cleavage of the lactone ring. Strains RC1A, RC3A andRC6A showed a remarkable enzymatic activity, showing potential to be used as feed additives.