Arginine accumulation suppresses heat production during fermentation of the biocontrol fungus Beauveria bassiana

文献类型： 外文期刊

第一作者： Wu, Tong

作者： Wu, Tong;Su, Jun;Wu, Tong;Zhan, Fangfang;Zeng, Liqiong;Lin, Haoyu;Cai, Shouping;Sun, Yanli;Fu, Shihui;Fang, Yu;Lin, Xiaochun

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关键词： Beauveria bassiana; solid-state fermentation; multiomics; arginine; heating period

期刊名称：APPLIED AND ENVIRONMENTAL MICROBIOLOGY （ 影响因子：3.7； 五年影响因子：4.5 ）

ISSN： 0099-2240

年卷期： 2025 年 91 卷 3 期

页码：

收录情况： SCI

摘要： Beauveria bassiana (Bb) is one of the most widely used biocontrol agents, and its products constitute more than one-third of the global market share of fungal insecticides. Solid-state fermentation (SSF) is widely used in the production of Beauve ria bassiana (Bb) because of its economic practicality and high production efficiency . However, the heat generated during fermentation can sharply reduce both the yield and quality of Bb, and current industrial methods to mitigate high temperatures during fermentation are inadequate, leading to increased production costs. Thus, exploring the underlying mechanism of how heat is produced by Bb is crucial for improving the SSF procedure and yield. This study employed multiomics data analysis of Bb during SSF to explore the relationships between fungal fermentation and environmental factors. We found that the heat production period for SSF was 12 hours to 48 hours post-inoculation. To further explore the underlying mechanism during this heating period, we identified 454 temperature-correlated metabolites (TCMs) and 1,994 temperature-correlated genes (TCGs). Annotations of the above TCMs and TCGs revealed significant enrichment in the arginine biosynthesis pathway; specifically, the expression level of glutamine synthetase, a TCG, decreased with fermentation time, whereas the expression levels of the TCGs L-arginine and L-glutamine increased with fermentation time, and glutamine synthetase and L-glutamine in the arginine biosynthesis pathway cycle produced the end prod uct L-arginine. Furthermore, when the substrates of the SSF were treated with exoge nous arginine, the temperature peak of the SSF significantly decreased with increasing concentration of exogenously added arginine.

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