Isolation of Thermophilic Bacteria from Extreme Environments in Northern Chile

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dc.contributor.authorBernardita Valenzuela
dc.contributor.authorFrancisco Solís Cornejo
dc.contributor.authorRubén Araya
dc.contributor.authorPedro Zamorano
dc.date.accessioned2026-01-26T15:59:00Z
dc.date.available2026-01-26T15:59:00Z
dc.date.issued2024
dc.description.abstractThe northern region of Chile boasts unique geographical features that support the emergence of geothermal effluents, salt lagoons, and coastal creeks. These extreme climate conditions create polyextreme habitats for microorganisms, particularly adapted to survive these harsh environments. These extremophilic microorganisms hold immense potential as a source of hydrolytic enzymes, among other biotechnological applications. In this study, we isolated 15 strains of aerobic thermophilic bacteria (45–70 ◦C) from sediment samples collected at five different ecological sites, including hot springs, geothermal fields, and lagoons in the Atacama Desert and Andes high planes. Analyses of the 16S rRNA gene sequences of the isolates showed a close genetic similarity (98–100%) with microorganisms of the genera Parageobacillus, Geobacillus, Anoxybacillus, and Aeribacillus. Notably, these thermophiles exhibited significant hydrolytic enzyme activity, particularly amylases, lipases, and proteases. These findings underscore the potential of using these thermophilic bacterial strains as an invaluable source of thermozymes with wide-ranging applications in diverse industries, such as detergent formulations, pharmaceutical processing, and food technology. This research highlights the ecological significance of these extreme environments in the Atacama Desert and Andes high plains, which serve as vital ecological niches housing extremophilic bacteria as a genetic source of relevant thermozymes, promising great potential for innovation in the biotechnology industry.
dc.description.sponsorshipAgencia Nacional de Investigación y Desarrollo (ANID), FONDEF-VIU110032 MEL, “Prospección y caracterización de microorganismos en el campo geotermal El Tatio, Chile”, Semillero SEM18-03: Dirección de Gestión de la Investigación, Universidad de Antofagasta
dc.identifier.doi10.3390/microorganisms12030473
dc.identifier.urihttps://repositorioabierto.uantof.cl/handle/uantof/634
dc.language.isoen
dc.rightsAttribution 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.sourceMicroorganisms
dc.titleIsolation of Thermophilic Bacteria from Extreme Environments in Northern Chile
dc.typeAnimation
oaire.citation.volume12
organization.identifier.rorUniversidad de Antofagasta
uantof.identificator.departmentDepartamento de Educación
uantof.identificator.departmentDepartamento Biomédico
uantof.identificator.facultyFacultad de Educación
uantof.identificator.facultyFacultad de Ciencias del Mar y Recursos Biológicos
uantof.identificator.facultyFacultad de Ciencias de la Salud
uantof.identificator.instituteInstituto Antofagasta
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Departamento de Educación
Departamento Biomédico
Instituto Antofagasta
Instituto de Ciencias Naturales Alexander von Humboldt