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<p>The production of polysaccharides through submerged fermentation using a sole corn steep liquor (CSL) medium with <i>Cordyceps militaris</i> (<i>C. militaris</i> GDMCC 5270) has been successfully demonstrated. Single-factor experiments and orthogonal optimization of culture conditions were conducted for analysis. The results indicated that the optimal fermentation conditions for <i>C. militaris</i> polysaccharides (CMP) were 6% (6&#xa0;mL/100&#xa0;mL) corn steep liquor, a 7% (7&#xa0;mL/100&#xa0;mL) inoculation amount, and 0.10% inorganic salt (KH<sub>2</sub>PO<sub>4</sub>: MgSO<sub>4</sub> = 1:1). The fermentation yield of CMP was 1.185&#xa0;g/L, which was 20.43% higher than that of the conventional group. Ultraviolet and FTIR spectroscopy analyses confirmed that CMP was a nucleic acid- and protein-free β-pyranose. Scanning electron microscopy (SEM) observations revealed that the CMP surface was rough, irregularly connected, and contains voids, exhibited a relatively compact polysaccharide structure. In vitro antioxidant assays demonstrated that CMP possessed significant antioxidant activity and could serve as a potential source of functional food. These results provide a novel approach to enhance the production of CMP using CSL as a medium, and explored promising biological activity and economic potential of <i>Cordyceps militaris</i> polysaccharides. </p>

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Improvement of Cordyceps militaris Polysaccharides Production by a Sole Corn Steep Liquor Medium, and its Antioxidant Activity

  • 期刊论文

  • 发表日期：

    2025年5月24日

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  • Yan Jiao,
  • Feng Xu,
  • Ying Chang

摘要

The production of polysaccharides through submerged fermentation using a sole corn steep liquor (CSL) medium with Cordyceps militaris (C. militaris GDMCC 5270) has been successfully demonstrated. Single-factor experiments and orthogonal optimization of culture conditions were conducted for analysis. The results indicated that the optimal fermentation conditions for C. militaris polysaccharides (CMP) were 6% (6 mL/100 mL) corn steep liquor, a 7% (7 mL/100 mL) inoculation amount, and 0.10% inorganic salt (KH2PO4: MgSO4 = 1:1). The fermentation yield of CMP was 1.185 g/L, which was 20.43% higher than that of the conventional group. Ultraviolet and FTIR spectroscopy analyses confirmed that CMP was a nucleic acid- and protein-free β-pyranose. Scanning electron microscopy (SEM) observations revealed that the CMP surface was rough, irregularly connected, and contains voids, exhibited a relatively compact polysaccharide structure. In vitro antioxidant assays demonstrated that CMP possessed significant antioxidant activity and could serve as a potential source of functional food. These results provide a novel approach to enhance the production of CMP using CSL as a medium, and explored promising biological activity and economic potential of Cordyceps militaris polysaccharides.