Detoxifying mycotoxins and antifungal properties of two rumen‐derived Enterococcus species in artificially contaminated corn silages

作者：Tianyi Dong, Yu-Cheng Liang, Tao Shao, Wenbo Wang, Pengfei Ma, Wenkang Wang, Junfeng Li, Xianjun Yuan · 发表于：Journal of the Science of Food and Agriculture · 年份：2023 · DOI：10.1002/jsfa.12670 · 被引用次数：10 · 研究领域：Mycotoxins in Agriculture and Food、Ruminant Nutrition and Digestive Physiology、Plant Toxicity and Pharmacological Properties

Abstract BACKGROUND Mycotoxins contamination in food and feed has emerged as an issue of serious concern because they pose serious health risks to both humans and livestock. The study aimed to evaluate the effects of two rumen‐derived Enterococcus spp. on fermentation and hygienic quality of artificially contaminated corn silages. The toxigenic fungal‐infested (FI) and non‐fungal infested (NFI) corn was harvested at 1/2 milk line stage and ensiled without additives (CON) or with Enterococcus faecalis (E) or Enterococcus faecium (M). RESULTS The pH of FI silages was higher than that of NFI silages, the pH in NFI‐M was lower than in NFI‐CON. Inoculating E. faecium markedly increased lactic acid concentration compared to CON and E silages. Both E. faecium and E. faecalis decreased the deoxynivalenol (DON) and zearalenone (ZEN) concentrations compared with the CON for FI silages, while E. faecium was more effective in eliminating aflatoxin B 1 (AFB 1 ). The FI silage had higher bacterial and fungal Shannon indexes than NFI silages. The relative abundance (RA) of Aspergillus and Fusarium marked a decline from day 5 to day 90. Inoculating E. faecium and E. faecalis reduced the RA of Penicillium compared to CON. In vitro mycotoxins removal assay indicated that E. faecium was more effective in AFB 1 detoxification while having lower detoxifying ZEN capacity than E. faecalis . CONCLUSION Inoculating rumen‐derived Enterococcus spp. isolates alleviated the negative effects of fungal inf...