alexa Plasmid-mediated dimethoate degradation in Pseudomonas aeruginosa MCMB-427.
Agri and Aquaculture

Agri and Aquaculture

Journal of Aquaculture Research & Development

Author(s): Deshpande NM, Dhakephalkar PK, Kanekar PP

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Abstract AIMS: To investigate the genetics of dimethoate degradation in Pseudomonas aeruginosa MCMB-427. METHODS AND RESULTS: Pseudomonas aeruginosa MCMB-427 demonstrated the ability to degrade dimethoate, a synthetic organophosphate insecticide. Total DNA preparation of MCMB-427 revealed the presence of a 6.6 kbp plasmid (designated as pDMD427). Escherichia coli NovaBlue transformed with plasmid pDMD427 subsequently acquired the ability to degrade dimethoate. Curing of the plasmid by plumbagin or ethidium bromide resulted in the loss of ability of MCMB-427 to degrade dimethoate. Plasmid pDMD427 was stable in MCMB-427 over 20 passages without selection. Genes encoding resistance to norfloxacin and cobalt were also located on plasmid pDMD427. CONCLUSION: The ability of Ps. aeruginosa MCMB-427 to degrade dimethoate is plasmid-mediated and transferable to other strains. SIGNIFICANCE AND IMPACT OF THE STUDY: As far as is known, this is the first report of plasmid-mediated dimethoate biodegradation. This study contributes significantly towards an understanding of the genetics of bacterial dimethoate degradation.
This article was published in Lett Appl Microbiol and referenced in Journal of Aquaculture Research & Development

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