A procura de bactérias degradadoras de metamidofós. / Searching for methamidofos degrading bacteria.

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

27/09/2011

RESUMO

Methamidophos is a strong acetylcholinesterase inhibitor and, therefore, a very toxic organophosphorus insecticide. This product has been widely employed for pest control in a variety of cultures, but little information is available about its biodegradation. 12 bacteria were isolated and characterized, from water and soil samples obtained from a site contaminated with methamidophos, which in preliminary tests showed the ability to degrade methamidophos, using it as a combined source of sulfur/nitrogen and/or phosphorus/sulfur. These isolates were identified by molecular biology methods and by characterization of its fatty acids profile as members of the genus Serratia, Pseudomonas, Stenotrophomonas and Curtobacterium. The ability to biodegrade the compound was lost after prolonged storage at -80ºC for unknown reasons. It was hypothesized that this negative result may have occurred due to loss of plasmids or by interference of products used in the stabilization of commercial methamidophos formulations.

ASSUNTO(S)

cinética do progresso anaeróbio compostos de fósforo environmental degradation environmental microbiology kinetics of progress anaerobic metamidofos methamidophos microbiologia ambiental organofosforados organophosphate phosphorus compounds biodegradação ambiental

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