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首页> 外文期刊>African Journal of Biotechnology >Characteristics of Bacillus subtilis HNMY-13 and HNMY-15 strains in aflatoxin B1 degradation and Astragalus bio-transformation
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Characteristics of Bacillus subtilis HNMY-13 and HNMY-15 strains in aflatoxin B1 degradation and Astragalus bio-transformation

机译：枯草芽孢杆菌HNMY-13和HNMY-15菌株在黄曲霉毒素B1降解和黄芪生物转化中的特征

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Astragalus of traditional Chinese medicine (TCM) and Bacillus subtilis are extensively used in animal feed and for production of various fermented compounds. In order to observe the characteristics of HNMY-13 and HNMY-15 B. subtilis strains, this study focused on the optimization of parameters in liquid fermentation of the two strains in aflatoxin B1 degradation, and Astragalus polysaccharide yield. The optimal parameters: degradation of aflatoxin B1, the bacterial count, and the Astragalus polysaccharide yield analysis were examined in this study. It was shown that the percentage degradation of AFB1 by HNMY-13 and HNMY-15 strains were 80.48 and 79.55% at 37°C, and 80.66% and 81.34 with pH 7.0. The percentage degradation by HNMY-13 was 88.07% after 48 h fermentation and by HNMY-15 was 84.81% after 60 h fermentation, respectively. The viable count of fermented sample was 8.8×108 and 7.6×108 CFU·mL-1 using HNMY-13 and HNMY-15 strains, respectively. The polysaccharide yielded by HNMY-13 was 4.93% at 48 h which is 1.7-fold higher than that of the control group, while polysaccharide yielded by HNMY-15 reached peak of 3.54% at 60 h. In conclusion, HNMY-13 and HNMY-15 of B. subtilis promote production of Astragalus polysaccharide in the process of liquid fermentation and can also degrade aflatoxin B1 significantly; hence the combination could form a potential feed additive for animals.
机译：中药黄芪和枯草芽孢杆菌广泛用于动物饲料和各种发酵化合物的生产。为了观察HNMY-13和HNMY-15枯草芽孢杆菌菌株的特性，本研究着重于优化这两种菌株在黄曲霉毒素B1降解和黄芪多糖产量方面的液体发酵参数。最佳参数：黄曲霉毒素B1的降解，细菌计数和黄芪多糖产量分析在本研究中进行了检查。结果表明，HNMY-13和HNMY-15菌株在37°C下对AFB1的降解百分数分别为80.48和79.55％，在pH值为7.0时分别为80.66和81.34。发酵48小时后，HNMY-13的降解百分数为88.07％，发酵60小时后，HNMY-15的降解百分数为84.81％。使用HNMY-13和HNMY-15菌株，发酵样品的活菌数分别为8.8×108和7.6×108 CFU·mL-1。 HNMY-13产生的多糖在48 h时为4.93％，是对照组的1.7倍，而HNMY-15产生的多糖在60 h时达到3.54％的峰值。总之，枯草芽孢杆菌的HNMY-13和HNMY-15在液体发酵过程中促进了黄芪多糖的产生，并且还可以显着降解黄曲霉毒素B1。因此，该组合可形成潜在的动物饲料添加剂。

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