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Artículo

Diverse UV-B Resistance of Culturable Bacterial Community from High-Altitude Wetland Water

Fernandez Zenoff, Maria VeronicaIcon ; Heredia, Judith; Ferrero, Marcela AlejandraIcon ; Siñeriz, FaustinoIcon ; Farias, Maria EugeniaIcon
Fecha de publicación: 04/2006
Editorial: Springer
Revista: Current Microbiology
ISSN: 0343-8651
e-ISSN: 1432-0991
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias Biológicas

Resumen

Isolation of most ultraviolet B (UV-B)-resistant culturable bacteria that occur in the habitat of Laguna Azul, a high-altitude wetland [4554 m above sea level (asl)] from the Northwestern Argentinean Andes, was carried out by culture-based methods. Water from this environment was exposed to UV-B radiation under laboratory conditions during 36 h, at an irradiance of 4.94 W/m2. It was found that the total number of bacteria in water samples decreased; however, most of the community survived long-term irradiation (312 nm) (53.3 kJ/m2). The percentage of bacteria belonging to dominant species did not vary significantly, depending on the number of UV irradiation doses. The most resistant microbes in the culturable community were Gram-positive pigmented species (Bacillus megaterium [endospores and/or vegetative cells], Staphylococcus saprophyticus, and Nocardia sp.). Only one Gram-negative bacterium could be cultivated (Acinetobacter johnsonii). Nocardia sp. that survived doses of 3201 kJ/m2 were the most resistant bacteria to UV-B treatment. This study is the first report on UV-B resistance of a microbial community isolated from high-altitude extreme environments, and proposes a method for direct isolation of UV-B-resistant bacteria from extreme irradiated environments.
Palabras clave: Uv-B Resistance , Bacterial Community , Wetlands
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/43486
DOI: http://dx.doi.org/10.1007/s00284-005-0241-5
URL: https://link.springer.com/article/10.1007/s00284-005-0241-5
Colecciones
Articulos(CCT - NOA SUR)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - NOA SUR
Articulos(PROIMI)
Articulos de PLANTA PILOTO DE PROC.IND.MICROBIOLOGICOS (I)
Citación
Fernandez Zenoff, Maria Veronica; Heredia, Judith; Ferrero, Marcela Alejandra; Siñeriz, Faustino; Farias, Maria Eugenia; Diverse UV-B Resistance of Culturable Bacterial Community from High-Altitude Wetland Water; Springer; Current Microbiology; 52; 5; 4-2006; 359-362
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