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Revista Latinoamericana de Microbiología

2007, Número 3-4

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Microbiología 2007; 49 (3-4)


Utilization of phenol in the presence of heavy metals by metal-tolerant nonfermentative gram-negative bacteria isolated from wastewater

Lima SAA, Pontes PM, Silva FRG, Ernesto Hofer E

Idioma: Ingles.
Referencias bibliográficas: 30
Paginas: 68-73
Archivo PDF: 134.40 Kb.


RESUMEN

Se estudiaron linajes de bacterias Gram negativas tolerantes a K2Cr2O7 o a HgCl2 aisladas de aguas residuales de una escuela de química en lo que respecta a la capacidad de utilización de fenol como única fuente de carbono en presencia de esos metales. Ambos metales mostraron un significativo efecto de inhibición al utilizar el compuesto aromático, pero un linaje Cr-tolerante (Burkholderia cepacia - JT50) logró metabolizar fenol en presencia de hasta 200 µg/ml de K2Cr2O7. Algunos estudios adicionales con ese linaje indicaron, que en las condiciones de los ensayos utilizados, su mecanismo de tolerancia no involucró procesos de reducción química de Cr6+ a Cr3+, ni tampoco variación en los niveles del cromo total en el medio de cultivo.


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