China Animal Husbandry and Veterinary Medicine ›› 2024, Vol. 51 ›› Issue (7): 3142-3154.doi: 10.16431/j.cnki.1671-7236.2024.07.038

• Basic Veterinary Medicine • Previous Articles    

Optimization of Streptomyces sp. Fermentation Medium for Production of Alkylated Anthraquinone by Response Surface Methodology

LIU Fang1, QUAN Tingting1,2, ZHANG Fei1, SHI Liqiao1, LIU Manli1, WU Zhaoyuan1   

  1. 1. Hubei Biopesticide Engineering Research Centre, Wuhan 430064, China;
    2. College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
  • Received:2023-11-28 Published:2024-07-03

Abstract: 【Objective】 This study was aimed to optimize the fermentation conditions and medium composition of Streptomyces sp. WS-13394 by response surface methodology,so as to improve the production level of alkylated anthraquinones produced by the strain,and provide technical support for the application of this compound in animal husbandry.【Method】 The optimal shake-flask fermentation conditions and the proper combination of carbon and nitrogen sources and mineral salts for the yield of alkylated anthraquinone produced by Streptomyces sp.WS-13394 were achieved through single-factor experiments.The significant factors affecting the yield of alkylated anthraquinone were fixed through Plackett-Burman design.The optimized medium for the yield of alkylated anthraquinone was achieved through the steepest ascending experiment,response surface design by fitting the significant factors with the yield of alkylated anthraquinone.【Result】 The composition of the optimized medium for the yield of alkylated anthraquinone produced by Streptomyces sp. WS-13394 was as followings:Soluble starch 28.12 g/L,fish meal 10.00 g/L,yeast extract 6.34 g/L,CaCO3 0.71 g/L,MgSO4 0.50 g/L,and K2HPO4 0.50 g/L. The theoretical yield of alkylated anthraquinone based on the nonlinear regression formula was 408.35 mg/L.The optimal combination was applied to shake bottle fermentation test,and the yield of alkylated anthraquinone was 411.73 mg/L,which was 3.59 times higher than that before optimization (89.70 mg/L).【Conclusion】 Response surface optimization was used to obtain the shaking flask fermentation medium formulation that significantly improved the yield of alkylated anthraquinone produced by Streptomyces sp.WS-13394.The results provided technical support for the studies of the antibacterial activity mechanism of this compound and the evaluation of its effect in animal models.

Key words: Streptomyces sp.; fermentation medium; optimization; response surface methodology; alkylated anthraquinone

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