Journal
FOOD CHEMISTRY
Volume 276, Issue -, Pages 436-442Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2018.10.011
Keywords
Deoxynivalenol; DON derivatives; Biodegradation; 3-keto-DON; Devosia insulae
Funding
- National Natural Science Foundation of China [31471662, U1604234]
- Jiangsu Provincial Natural Science Foundation [BK20160595]
- Special Fund for Risk Assessment of China [GJFP201700102]
- Jiangsu Agriculture Science and Technology Innovation Fund [CX(17)1003]
- International Science & Technology Cooperation Program of China [2016YFE0112900]
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Deoxynivalenol (DON), a notorious mycotoxin mainly found in Fusarium-contaminated crops, causes great loss in livestock farming and severe safety risks to human health. Here we report the isolation of a Gram-negative bacterial strain with effective biodegrading abilities on DON and its derivatives including 3-acetyl-DON and 15-acetyl-DON. The strain was identified as Devosia insulae A16 on the basis of morphological and physiological characteristics and 16S rRNA-based phylogenetic analysis. D. insulae A16 was able to degrade 88% of 20 mg/l DON within 48 h under aerobic conditions at 35 degrees C and neutral pH. The major degradation product of DON and its derivatives was 3-keto-DON by the oxidation of the hydroxyl group at C-3. Both 3-acetyl-DON and 15-acetyl-DON underwent a deacetylation reaction to generate DON prior to the degradation to 3-keto-DON. The results provide the potential use of D. insulae A16 as a biodegradation agent to control DON contamination in cereals.
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