Solimonas capable of efficiently degrading aflatoxin B1 and application thereof

Abstract

The invention discloses solimonas capable of efficiently degrading aflatoxin B1 and application thereof, and particularly provides a solimonas (solimonas sp.) strain CW980 and application thereof in degradation of aflatoxin B1 with the low pollution concentration. Compared with an existing aflatoxin degradation bacterium, the strain CW980 can achieve the excellent degradation effect under the low-concentration aflatoxin pollution condition. Under the liquid fermentation condition, in a fermentation culture solution containing the aflatoxin B1 with the final concentration of 20 mug / L, the degradation rate of the strain CW980 to the aflatoxin B1 after 24 h is 37.8%, the degradation rate after 48 h reaches 70.3%, and the degradation rate after 72 h reaches up to 90.4 %. By processing feed polluted by the aflatoxin B1(the final concentration is 20 mug / kg) with the strain CW980 for 48 h, the AFB1 degradation rate is 23.0%, and the AFB1 degradation rate reaches 75.5% after 72 h. The strain CW980 has the substantial application value and great significance in the aspect of biological detoxification application of food and feed.

Description

technical field [0001] The invention relates to the field of microbiology and biodegradation, in particular to an Agromonas that efficiently degrades aflatoxin B1 and its application. Background technique [0002] Aspergillus mycotoxins are mainly secondary metabolites produced by Aspergillus flavus, A. (OTA) is the most toxic and most widely polluted in agricultural production and food industry. In 1993, aflatoxin was classified as a Class I carcinogen by the World Health Organization (WHO) Cancer Research Institute. Because of its strong carcinogenic, teratogenic and mutagenic properties, aflatoxin has gradually become the focus of public health and scientific research. Contamination of grain and oil crops with aflatoxins and ochratoxins has become a global problem. In animal husbandry, the two types of aspergillus can endanger animal health by contaminating feed, leading to low productivity in animal husbandry, causing serious economic losses, and through direct Or indi...

AI Technical Summary

Problems solved by technology

Most of the virus-free strains reported so far have the following two common problems in practical application: First, the detoxification mechanism of some virus-free strains belongs to physical adsorption, not substantial biodegradation, and is adsorbed on the cell wall of the bacteria detoxification may occur under different physical and chemical environments in animals or humans, and has no substantial detoxification significance; second, the detoxification rate of the reported strains to toxins is mostly measured at a higher concentration of 100 μg / kg or more. There are few reports on the actual detoxification ability of low-concentration aspergillus toxoids (less than 20 μg / kg) in complex matrices such as food raw materials and feedstuffs

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