数字农科院2.0

Optimization of the fermentation culture conditions of Bacillus amyloliquefaciens ck-05 using response surface methodology

文献类型： 外文期刊

作者： Xiaoyu Liu;Jerome Jeyakumar John Martin;Xinyu Li;Lixia Zhou;Rui Li;Qihong Li;Jianwei Zhang;Dengqiang Fu;Hongxing Cao

作者机构：

关键词： Bacillus amyloliquefaciens ck-05;culture conditions;fermentation optimization;optimization;response surface methodology

期刊名称： Frontiers in Microbiology

ISSN： 1664-302X

年卷期： 2025 年 16 卷

页码：

收录情况： SCIE（2025版）

摘要： Bacillus amyloliquefaciens is widely recognized for its potential as a biofertilizer and biocontrol agent in agriculture due to its plant growth-promoting (PGP) mechanisms. However, the practical application of this bacterium is often limited by suboptimal fermentation conditions, which hinder its growth and efficacy. While numerous studies have optimized growth conditions for various strains of B. amyloliquefaciens, the novelty of this work lies in the systematic optimization of fermentation conditions for B. amyloliquefaciens ck-05, a strain obtained from a culture collection, and its potential application as a biofertilizer. In this study, single-factor experiments were conducted to evaluate the effects of carbon and nitrogen sources, inorganic salts, pH, temperature, culture time, rotation speed, inoculation rate, and liquid volume on the OD600 value of strain ck-05. A Plackett-Burman design was used to identify the significant factors influencing OD600, followed by a Box-Behnken design to determine the optimal growth conditions. The results revealed that soluble starch, peptone, and magnesium sulfate significantly impacted the growth of B. amyloliquefaciens ck-05. The optimized fermentation conditions were determined to be pH 6.6, temperature 30°C, culture time 40 h, rotation speed 150 rpm, inoculum rate 0.8%, and liquid volume 40%. Post-optimization, the OD600 of the fermentation broth increased by 72.79% compared to pre-optimization levels. The culture and fermentation conditions for B. amyloliquefaciens ck-05 were successfully optimized, providing a theoretical foundation for the future development of this strain as a microbial fertilizer.

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