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Article

Deoxynivalenol Degradation by Various Microbial Communities and Its Impacts on Different Bacterial Flora

1
College of Biological and Chemical Engineering, Zhejiang University of Science and Technology, Hangzhou 310023, China
2
Guelph Research and Development Centre, Agriculture and Agri-Food Canada, Guelph, ON N1G 5C9, Canada
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Toxins 2022, 14(8), 537; https://doi.org/10.3390/toxins14080537 (registering DOI)
Received: 13 May 2022 / Revised: 4 July 2022 / Accepted: 3 August 2022 / Published: 5 August 2022
Deoxynivalenol, a mycotoxin that may present in almost all cereal products, can cause huge economic losses in the agriculture industry and seriously endanger food safety and human health. Microbial detoxifications using microbial consortia may provide a safe and effective strategy for DON mitigation. In order to study the interactions involving DON degradation and change in microbial flora, four samples from different natural niches, including a chicken stable (expJ), a sheep stable (expY), a wheat field (expT) and a horse stable (expM) were collected and reacted with purified DON. After being co-incubated at 30 °C with 130 rpm shaking for 96 h, DON was reduced by 74.5%, 43.0%, 46.7%, and 86.0% by expJ, expY, expT, and expM, respectively. After DON (0.8 mL of 100 μg/mL) was co-cultivated with 0.2 mL of the supernatant of each sample (i.e., suspensions of microbial communities) at 30 °C for 96 h, DON was reduced by 98.9%, 99.8%, 79.5%, and 78.9% in expJ, expY, expT, and expM, respectively, and was completely degraded after 8 days by all samples except of expM. DON was confirmed being transformed into de-epoxy DON (DOM-1) by the microbial community of expM. The bacterial flora of the samples was compared through 16S rDNA flux sequencing pre- and post the addition of DON. The results indicated that the diversities of bacterial flora were affected by DON. After DON treatment, the most abundant bacteria belong to Galbibacter (16.1%) and Pedobacter (8.2%) in expJ; Flavobacterium (5.9%) and Pedobacter (5.5%) in expY; f_Microscillaceae (13.5%), B1-7BS (13.4%), and RB41 (10.5%) in expT; and Acinetobacter (24.1%), Massilia (8.8%), and Arthrobacter (7.6%) in expM. This first study on the interactions between DON and natural microbial flora provides useful information and a methodology for further development of microbial consortia for mycotoxin detoxifications.
Keywords: deoxynivalenol; microbial detoxification; microbial diversity; high-throughput sequencing deoxynivalenol; microbial detoxification; microbial diversity; high-throughput sequencing
MDPI and ACS Style

Cai, C.; Zhao, M.; Yao, F.; Zhu, R.; Cai, H.; Shao, S.; Li, X.-Z.; Zhou, T. Deoxynivalenol Degradation by Various Microbial Communities and Its Impacts on Different Bacterial Flora. Toxins 2022, 14, 537. https://doi.org/10.3390/toxins14080537

AMA Style

Cai C, Zhao M, Yao F, Zhu R, Cai H, Shao S, Li X-Z, Zhou T. Deoxynivalenol Degradation by Various Microbial Communities and Its Impacts on Different Bacterial Flora. Toxins. 2022; 14(8):537. https://doi.org/10.3390/toxins14080537

Chicago/Turabian Style

Cai, Chenggang, Miaomiao Zhao, Feng Yao, Ruiyu Zhu, Haiying Cai, Suqin Shao, Xiu-Zhen Li, and Ting Zhou. 2022. "Deoxynivalenol Degradation by Various Microbial Communities and Its Impacts on Different Bacterial Flora" Toxins 14, no. 8: 537. https://doi.org/10.3390/toxins14080537

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