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Modification of the Mycotoxin Deoxynivalenol Using Microorganisms Isolated from Environmental Samples
Nina M Wilson1, Nicole McMaster2, Dash Gantulga3
1Department of Plant Pathology, Physiology, and Weed Science, Virginia Tech, Blacksburg, VA 24061, USA. nina09@vt.edu.
Toxins
|April 20, 2017
Summary
Researchers discovered soil microorganisms that can break down the mycotoxin deoxynivalenol (DON). These microbes convert DON into a less toxic form, offering a potential biological solution for contaminated food and feed.
Area of Science:
- Microbiology
- Mycotoxicology
- Environmental Science
Background:
- Deoxynivalenol (DON) is a prevalent trichothecene mycotoxin contaminating staple crops like wheat, barley, and maize.
- Effective strategies for reducing DON in food and feed are crucial for public health and agricultural safety.
Purpose of the Study:
- To identify and characterize microorganisms capable of degrading deoxynivalenol (DON).
- To explore the potential of microbial remediation for mycotoxin contamination in agricultural products.
Main Methods:
- Screening of soil microorganisms by incubation with DON and analysis using gas chromatography-mass spectrometry (GC/MS).
- Identification of microbial consortia using 16S rRNA sequencing.
- Characterization of DON by-products using Nuclear Magnetic Resonance (NMR) spectroscopy.
Main Results:
- Two mixed microbial cultures from soil samples demonstrated consistent reduction of DON levels.
- 3-keto-4-deoxynivalenol was identified as the primary DON by-product.
- One mixed culture effectively converted DON to the less toxic 3-epimer-DON (3-epi-DON) in naturally contaminated wheat.
Conclusions:
- Environmental microorganisms, including genera like Acinetobacter, Leadbetterella, and Gemmata, can metabolize deoxynivalenol.
- Microbial bioprospecting offers a promising avenue for developing commercial applications to reduce mycotoxin contamination in food, feed, and co-products.