Molecular Microbiology Research 2024, Vol.14, No.6, 271-276 http://microbescipublisher.com/index.php/mmr 271 Feature Review Open Access Advances in the Research on the Characteristics and Applications of Bacillus tequilensis Liyuan Wei, Qiumei Qin, Xianglan Tang, Yan Zhou Guangxi Key Laboratory for Polysaccharide Materials and Modifications, School of Marine Sciences and Biotechnology, Guangxi Minzu University, Nanning, 530008, Guangxi, China Corresponding author: zy209@126.com Molecular Microbiology Research, 2024, Vol.14, No.6 doi: 10.5376/mmr.2024.14.0029 Received: 13 Nov., 2024 Accepted: 28 Nov., 2024 Published: 09 Dec., 2024 Copyright © 2024 Wei et al., This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Preferred citation for this article: Wei L.Y., Qin Q.M., Tang X.L., and Zhou Y., 2024, Advances in the research on the characteristics and applications of Bacillus tequilensis, Molecular Microbiology Research, 14(6): 271-276 (doi: 10.5376/mmr.2024.14.0029) Abstract Bacillus spp. are Gram-positive bacteria known for producing a wide range of bioactive compounds that can effectively control biological diseases. Bacillus tequilensis, a species within the Bacillus genus, exhibits broad-spectrum antagonistic activity and holds significant potential as a biocontrol agent. This review focuses on three main aspects: the origin and characteristics of B. tequilensis, its applications in biological control, and its primary active compounds. The article concludes with a summary and outlook on its future applications, along with corresponding recommendations, aiming to provide a theoretical reference for subsequent research and application of B. tequilensis in agriculture and other fields. Keywords Bacillus tequilensis; Biological control; Active compounds; Resistance 1 Introduction Bacillus tequilensis is widely found in nature, including mineral soils, animal intestines, and plant rhizospheres. The first strain of B. tequilensis was discovered in a tomb (Sun, 2020). Subsequent phenotypic and phylogenetic analyses identified it as a member of the Bacillus genus. Numerous studies have shown that B. tequilensis exhibits strong antibacterial activity, making it a promising biocontrol strain. To date, research on B. tequilensis in China is limited, with most studies focusing on its applications in biological control, indicating substantial potential for further development. Research has shown that B. tequilensis can control pathogenic fungi such as Ceratocystis fimbriata (Li et al., 2022), Colletotrichum camelliae (Zhou et al., 2023), and Verticillium dahliae (Shen et al., 2018), as well as pathogenic bacteria like Elizabethkingia miricola, Stenotrophomonas maltophilia, and Aeromonas hydrophila (Zhu et al., 2024). Additionally, it has properties for algicidal activity (Shao, 2021), pulp bleaching (Angural et al., 2020), and mitigating heavy metal pollution (Li, 2018b), demonstrating broad application prospects. Therefore, B. tequilensis has the potential to become an eco-friendly biological agent. 2 Origin and Characteristics of Bacillus tequilensis An endophytic antagonistic strain of B. tequilensis X-16 was isolated from the "Meizao" sweet cherry at the Tianping Lake Base of the Shandong Institute of Pomology. Its fermentation broth and supernatant can effectively inhibit Monilinia fructicola, the causal agent of brown rot in stone fruits, effectively addressing the rot problem caused by this pathogen in "Meizao" sweet cherries (Xi et al., 2020). The strain B. tequilensis wm031, isolated from tomato plants, exhibits significant antagonistic activity against pathogens such as Fusarium oxysporum (causing tomato wilt), Gibberella fujikuroi (causing bakanae disease in rice), and Fusarium oxysporum f. sp. niveum (causing watermelon wilt). Using rifampicin marker technology, wm031 was found to have strong colonization capabilities in tomato, watermelon, and rice crops (Zhang et al., 2017b). A strain RA1402 was isolated from rhizosphere soil at a sorghum aphid outbreak site in Yibin, showing strong anti-aphid activity (Zhang et al., 2017a). The strain B. tequilensis 36, isolated from cycad rhizosphere soil, was applied in solid-state fermentation of tea, effectively enhancing tea flavor with a subtle fruity aroma, stabilizing tea quality, and imparting a unique taste (Li et al., 2018). Another strain, B. tequilensis CD36, also isolated from cycad
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