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Effect of FGM Strain Passage Times on the Transformation of Astragalus Polysaccharide from Astragalus membranaceus by Fermentation

SHANG Li-ming, QIN Zhe, ZHANG Jing-yan, WANG Xu-rong, WANG Lei, KONG Xiao-jun, CHEN Jie, YANG Zhi-qiang, WANG Xue-zhi, LI Jian-xi   

  1. (Key Laboratory of New Animal Drug Project of Gansu Province, Key Laboratory of Veterinary Pharmaceutical Development of Ministry of Agriculture, Engineering & Technology Research Center of Traditional Chinese Veterinary Medicine, Lanzhou Institute of Husbandry and Pharmaceutical Science, Chinese Academy of Agricultural Sciences, Lanzhou 730050, China)

  • Revised:2014-03-13 Online:2014-06-20 Published:2014-07-24

Abstract:   The assay was aimed to further improve the stability of fermentation of Astragalus membranaceus by Streptococcus alactolyticus FGM strain. First,Astragalus membranaceus-sulfuric acid method,respectively. Finally, we made a statistical analysis. The results showed that the multiple continuous passage of FGM strain had caused the serious degeneration phenomenon of FGM strain and extremely significantly affected the yield of APS (P=0.007), so the fermentation performance was the strongest after the 4th generation of subculture. was inoculated with the successively passaged FGM strain to fermentation, then we measured the viable counts of FGM strain and the yield of Astragalus polysaccharide (APS) by bacteria plate count method and phenol The assay was aimed to further improve the stability of fermentation of Astragalus membranaceus by Streptococcus alactolyticus FGM strain. First,Astragalus membranaceus was inoculated with the successively passaged FGM strain to fermentation, then we measured the viable counts of FGM strain and the yield of Astragalus polysaccharide (APS) by bacteria plate count method and phenol-sulfuric acid method,respectively. Finally, we made a statistical analysis. The results showed that the multiple continuous passage of FGM strain had caused the serious degeneration phenomenon of FGM strain and extremely significantly affected the yield of APS (P=0.007), so the fermentation performance was the strongest after the 4th generation of subculture.

Key words: FGM strain; passage times; fermentation; strain amount; APS content