Degradation of deoxynivalenol by a mixed bacteria with lanthanum chloride as a growth factor

• Published in: Food control 2024-06, Vol.160, p.110335, Article 110335
• Main Authors: Cui, Chaoyue, Lv, Haoxin, Liu, Yijun, Huo, Shanshan, Liu, Shichang, Zhao, Yan
• Format: Article
• Language: English
• Subjects: Arginine; Biodetoxification; Corn deoxynivalenol detoxification; Deoxynivalenol infection; Lanthanum chloride; Quorum sensing
• ISSN: 0956-7135; 1873-7129
• DOI: 10.1016/j.foodcont.2024.110335

Food and feed are susceptible to deoxynivalenol (DON) infection during storage. Biodetoxification is a way to reduce the harmful effects of DON and ensure food and feed safety. In this study, lanthanum chloride was used as a growth factor to enrich DON degrading bacteria and the mixed bacteria SH7 was obtained. The DON degrading mechanism of SH7 and its application in corn DON detoxification were explored. Results showed that lanthanum chloride promoted DON degradation of SH7 by affecting its microbial composition, related gene expression level and metabolites. SH7 may have quorum sensing of DON and collectively initiate the expression of DON detoxification genes. SH7 could also utilize a large amount of arginine to resist the toxic effects of DON. In addition, the DON degrading rate of SH7 in corns was 26.95 %. This research provides a theoretical basis for applying the mixed bacteria SH7 in the detoxification of DON in corns. [Display omitted] •A novel and efficient deoxynivalenol (DON) degrading mixed bacteria SH7 was enriched.•LaCl3 promoted SH7 DON degradation by affecting microorganism, gene and metabolite.•SH7 may have DON quorum sensing and initiate the expression of DON-detoxifying genes.•SH7 could also utilize a large amount of arginine to resist the toxic effects of DON.•The DON degrading rate of SH7 in corns was 26.95 %.