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J Environ Biol ; 37(4): 611-8, 2016 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-27498509

RESUMEN

Acephate-degrading bacterial isolates were isolated from the larval gut of diamondback moth Plutella xylostella, a notorious pest of cruciferous crops worldwide that has developed resistance to insecticides. Partial 16S rRNA gene sequencing identified the isolates as Bacillus cereus (PX-B.C.Or), Enterobacter asburiae (PXE), and Pantoae agglomerans (PX-Pt.ag.Jor). All isolates grew on minimal media (MM) in the presence of acephate at 100 and 200 ppm, with maximum growth at 200 ppm. LC-MS analyses of spent medium showed that E. asburiae degraded acephate to methamidophos and O, O-dimethyl phosporamidate and B. cereus O,S-dimethyl to phosphorothioate but P. agglomerans to an unnamed compound. All three isolates used acephate as a source of carbon and energy for growth; however, P. agglomerans used it also as source of sulphur. Strong evidence revealed that the bacterial communities present in the gut of diamondback moth might aid in acephate degradation and play a role in the development of insecticide resistance.


Asunto(s)
Bacillus cereus/metabolismo , Enterobacter/metabolismo , Insecticidas/metabolismo , Mariposas Nocturnas/microbiología , Compuestos Organotiofosforados/metabolismo , Pantoea/metabolismo , Fosforamidas/metabolismo , Animales , Bacillus cereus/genética , Biodegradación Ambiental , Brassicaceae/crecimiento & desarrollo , Productos Agrícolas/crecimiento & desarrollo , ADN Bacteriano/genética , ADN Bacteriano/metabolismo , Enterobacter/genética , Larva/crecimiento & desarrollo , Larva/microbiología , Datos de Secuencia Molecular , Mariposas Nocturnas/crecimiento & desarrollo , Pantoea/genética , Filogenia , ARN Ribosómico 16S/genética , ARN Ribosómico 16S/metabolismo
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