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Extremophiles, microorganisms blooming in extreme environmental conditions, hold particular significance in the domain of microbial research. This review paper focuses on extremophilic microorganisms, emphasizing their adaptations and the diverse products they generate, with a particular emphasis on exopolysaccharides (EPSs). EPSs, high molecular weight carbohydrate biopolymers, stand out as valuable products with applications across various industries. The review explores EPS production by bacteria in extreme conditions, including thermophilic, halophilic, and psychrophilic environments. Noteworthy examples, such as B. thermantarcticus and H. smyrnensis AAD6T, highlight the vast potential of extremophiles in EPS production. Additionally, the paper explores the major synthesis pathways of EPSs, shedding light on the factors influencing biosynthesis. The commercial significance of EPSs, especially for extremophiles, is underlined by their applications in medicine, food, environmental protection, agriculture, cosmetics, and more. Furthermore, the review sheds light on the role of extremophiles in various ecosystems, such as acidophiles, alkaliphiles, halophiles, hyperthermophiles, oligotrophs, osmophiles, piezophiles, and radioresistant organisms. This comprehensive analysis highlights the broad impact of extremophilic microorganisms and their EPS products in scientific exploration and commercial innovation.
Upadhyaya et al. (Thu,) studied this question.
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