Mercury-Resistant bacteria isolated from an estuarine ecosystem with detoxification potential
Quintero, Marynes (Marine and Coastal Research Institute)
Zuluaga Valencia, Sol D. (Marine and Coastal Research Institute)
Ríos López, Lady Giselle (Marine and Coastal Research Institute)
Sánchez Martínez, M. Olga (Universitat Autònoma de Barcelona. Departament de Genètica i de Microbiologia)
Bernal, Cesar A. (Marine and Coastal Research Institute)
Sepúlveda, Niza (Technological University of Choco "Diego Luis Cordoba")
Gómez-León, Javier (Marine and Coastal Research Institute)
Universitat Autònoma de Barcelona. Departament de Genètica i de Microbiologia

Data:	2024
Resum:	Mercury pollution is a significant environmental issue, primarily resulting from industrial activities, including gold mining extraction. In this study, 333 microorganisms were tested in increasing mercury concentrations, where 158 bacteria and 14 fungi were able to grow and remain viable at concentrations over 5. 0 mg/L of mercuric chloride (II). One of the bacterial strains, Stenotrophomonas sp. INV PRT0231, isolated from the mouth of the San Juan River in the Chocó region in Colombia, showed a high mercury resistance level (MIC90 of 27 ± 9 mg/L), with a removal rate of 86. 9%, an absorption rate of 1. 2%, and a volatilization rate of 85. 7% at pH 6. 0 and 30. 0 °C. The FTIR analysis showed changes in the functional groups, including fatty acid chains and methyl groups, proteins, and lipopolysaccharides associated with the carboxylate group (COO-), suggesting an important role of these biomolecules and their associated functional groups as mechanisms employed by the bacterium for mercury detoxification. Our study contributes to the understanding of the mechanisms of mercury biotransformation in microbial environmental isolates to help develop bioremediation strategies to mitigate mercury pollution caused by anthropogenic activities.
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Mercury detoxification ; Stenotrophomonassp ; Volatilization
Publicat a:	Microorganisms, Vol. 12, Issue 12 (December 2024) , art. 2631, ISSN 2076-2607

DOI: 10.3390/microorganisms12122631
PMID: 39770833

16 p, 1.5 MB

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