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Thermophilic bacteria can mobilize sulfur from organic matter in temperate terrestrial environments

AutorPortillo Guisado, María del Carmen ; González Grau, Juan Miguel
Fecha de publicación1-oct-2009
EditorCSIC-UIB - Instituto Mediterráneo de Estudios Avanzados (IMEDEA)
CitaciónScientific Program and Abstracts. IX Reunión Red Nacional de Microorganismos Extremófilos (RedEx 2009): 26 (2009)
ResumenMicrobial diversity is represented by a huge number of different microorganisms in most natural environments although the ecological function of each of them remains to be understood (Curtis et al. 2002). The presence of thermophilic bacteria in temperate environments has been previously reported (Ghani et al. 1993). Herein, we report on a potential ecological role of a group of thermophilic bacteria commonly present in temperate terrestrial environments. These bacteria belong mainly to the Firmicutes and grow above 45ºC up to 75ºC, and are able to produce sulfate during heterotrophic growth on S-containing organic compounds (i.e., proteins). These bacteria are shown to be active during high temperature periods as judged by their detection through RNA-based molecular techniques in natural samples. Sulfur in soils is mostly found as organic compounds and the mobilization of organic sulfur as sulfate at low temperature has been reported to be poor (Ghani et al. 1993). Thus, thermophilic bacteria could represent an important link within the sulfur cycle suggesting the seasonality of this process which can be increased during current climate warming. This is an example of thermophilic bacterial processes occurring in terrestrial temperate environments.
DescripciónComunicación oral presentada al congreso RedEX 2009, celebrado del 1-2 de octubre 2009, en Alcudia, Mallorca, España.
URIhttp://hdl.handle.net/10261/92070
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