Molecular Microbiology Research 2024, Vol.14, No.6, 271-276 http://microbescipublisher.com/index.php/mmr 274 In the paper industry, B. tequilensis can be used for pulp bleaching (Angural et al., 2020). In the petroleum industry, B. tequilensis has the potential to generate gas, emulsify, and enhance oil recovery under anaerobic conditions, demonstrating good oil reservoir adaptability and potential for oil extraction (Lin et al., 2019). In the field of food fermentation, there have been bold explorations using B. tequilensis to ferment rapeseed meal. During the fermentation process, proteases secreted by B. tequilensis break down rapeseed protein into small peptides and proteins, increasing the amino acid content, which also exhibits antioxidant activity (Zhong et al., 2022). In the environmental sector, siderophores secreted by B. tequilensis can mitigate the stress and toxicity of Ni²⁺ and Pb²⁺ on plants, enhancing the efficiency of phytoremediation of heavy metal pollution (Li, 2018b). Research by Shao Xueping (2021) indicated that the algicidal compounds (surfactin-like substances) produced by B. tequilensis D8 exhibit strong algicidal activity against four types of algae: Pseudo-nitzschia delicatissima, Skeletonema costatum, Heterosigma akashiwo, and Prorocentrum donghaiense. The algicidal effects are relatively stable, providing experimental support for red tide control. 5 Main Active Compounds During its growth and reproduction, B. tequilensis produces numerous secondary metabolites, primarily including lipopeptides (biosurfactants) (Singh and Sharma, 2020) with antagonistic activity against pathogens, antibacterial proteins (such as cellulase, protease, and gelatinase) (Guan, 2018), and polyketides. Additionally, it produces growth-promoting substances for plants, such as indole-3-acetic acid (IAA), ACC deaminase, and siderophores (Guan, 2018). It also synthesizes amino acids, organic acids, and thiamine, which regulate cell growth and metabolism. Importantly, the bioactive metabolites of B. tequilensis maintain high activity under conditions of high temperature, strong acidity, neutral pH, mild alkalinity, and UV irradiation (Jiang et al., 2023). In contrast, other biocontrol strains often exhibit low bioactivity under these conditions, limiting their effectiveness in biological control. B. tequilensis overcomes these limitations, making it a superior biocontrol strain and laying a solid foundation for its future applications across various fields. 6 Summary and Prospect Some studies have shown that B. tequilensis can produce highly effective bioactive compounds; however, the types of these active compounds and their mechanisms of action remain unclear and require further investigation. Many reports on the biological control potential of B. tequilensis are based primarily on results from in vitro plate confrontation experiments, while field trials are relatively scarce. It is well known that the biocontrol efficacy observed in laboratory assays can differ significantly from that seen in field applications. Therefore, when promising results are obtained indoors, it is crucial to conduct large-scale field trials under various conditions to validate the actual biocontrol effectiveness of the target strain and determine its practical application value. Moreover, the antimicrobial substances secreted by B. tequilensis are stable and effective, playing an important role in the sustainable development of both agriculture and industry. It is anticipated that in the future, B. tequilensis will find broader applications across multiple fields. Funding This study was funded by the project of Guangxi Minzu University's Autonomous Region-level College Student Innovation and Entrepreneurship Training Program Fund (S202310608308). Acknowledgments Thanks to the reviewers for their valuable feedback, which has helped improve the the manuscript.
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