Artículo
Light as an energy source in continuous cultures of bacteriorhodopsin-containing halobacteria
Autor/es | Nieto Gutiérrez, Joaquín José
Rodríguez Valera, Francisco Ruiz Berraquero, Francisco |
Departamento | Universidad de Sevilla. Departamento de Microbiología y Parasitología |
Fecha de publicación | 1983 |
Fecha de depósito | 2016-03-10 |
Publicado en |
|
Resumen | The role of light as an energy source for slightly aereated cultures of halobac teria was studied, using continuous cultures with low nutrient concentrations and a low oxygen supply. A series of experiments were carried ... The role of light as an energy source for slightly aereated cultures of halobac teria was studied, using continuous cultures with low nutrient concentrations and a low oxygen supply. A series of experiments were carried out with non illuminated and differently illuminated cultures and with ditferent oxygen transfer rates. Under low oxygen availability, light proved to be a decisively important energy source that allowed the populations to reach higher growth rates and much higher population densities. Oxygen inftuenced the growth over only a minimal level, below which neither the illuminated nor the dark cultures were atfected by the oxygen transfer rate. From these results, it appears that the bacteriorhodop sin-mediated energy supply could have a very important role for the ecology of halobacteria in their microaerophilic habitats. In the illuminated cultures, cells that originated purple colonies on plates appeared. These cells, which could be bacteriorhodopsin-constitutive mutants, are now being studied. |
Ficheros | Tamaño | Formato | Ver | Descripción |
---|---|---|---|---|
Light as an energy source.pdf | 611.1Kb | [PDF] | Ver/ | |