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Título : Molecular analysis of enrichment cultures of ammonia oxidizers from the Salar de Huasco, a high altitude saline wetland in northern Chile
Autor : Dorador, Cristina
Busekow, Annika
Vila, Irma
Imhoff, Johannes
Witzel, Karl-Paul
Palabras clave : Chile
Región I
Investigación Biológica
Fecha de publicación : may-2008
Editorial : Extremophiles
Resumen : We analyzed enrichment cultures of ammonia-oxidizing bacteria (AOB) collected from different areas of Salar de Huasco, a high altitude, saline, pH-neutral water body in the Chilean Altiplano. Samples were inoculated into mineral media with 10 mM NH4+ at five different salt concentrations (10, 200, 400, 800 and 1,400 mM NaCl). Low diversity (up to three phylotypes per enrichment) of beta-AOB was detected using 16S rDNA and amoA clone libraries. Growth of beta-AOB was only recorded in a few enrichment cultures and varied according to site or media salinity. In total, five 16S rDNA and amoA phylotypes were found which were related to Nitrosomonas europaea/Nitrosococcus mobilis, N. marina and N. communis clusters. Phylotype 1-16S was 97% similar with N. halophila, previously isolated from Mongolian soda lakes, and phylotypes from amoA sequences were similar with yet uncultured beta-AOB from different biofilms. Sequences related to N. halophila were frequently found at all salinities. Neither gamma-AOB nor ammonia-oxidizing Archaea were recorded in these enrichment cultures.
Descripción : Coordenadas geográficas: Latitud -20°16'31" Longitud -68°52'53"
URI : http://biblioteca.cehum.org/handle/123456789/631
ISSN : 1431-0651
Aparece en las colecciones: Ciencias Naturales y Aplicadas