Abstract
A bacterium capable of utilizing carbaryl (1-naphthyl N-methylcarbamate) as the sole carbon source was isolated from carbaryl-treated soil. This bacterium was characterized taxonomically as Arthrobacter and was designated strain RC100. RC100 hydrolyzes the N-methylcarbamate linkage to 1-naphthol, which was further metabolized via salicylate and gentisate. Strain RC100 harbored three plasmids (designated pRC1, pRC2, and pRC3). Mutants unable to degrade carbaryl arose at a high frequency after treating the culture with mitomycin C. All carbaryl-hydrolysis-deficient mutants (Cah-) lacked pRC1, and all 1-naphthol-utilization-deficient mutants (Nat-) lacked pRC2. The plasmid-free strain RC107 grew on gentisate as a carbon source. These two plasmids could be transferred to Cah- mutants or Nat- mutants by conjugation, resulting in the restoration of the Cah and Nah phenotypes.
MeSH Terms
Arthrobacter/genetics,isolation & purification,metabolism
Biodegradation, Environmental
Carbamates/metabolism
Carbaryl/metabolism
Conjugation, Genetic
DNA, Bacterial/analysis,genetics
DNA, Ribosomal/analysis,genetics
Insecticides/metabolism
Molecular Sequence Data
Oxygen Consumption
Plasmids/genetics
RNA, Ribosomal, 16S/genetics
Soil Microbiology
Chemicals
Carbamates
DNA, Bacterial
DNA, Ribosomal
Insecticides
RNA, Ribosomal, 16S
N-methylcarbamate
Carbaryl
Authors & Affiliations
3 authors, click to expand affiliations / ORCID
Hayatsu M
Faculty of Agriculture, Shizuoka University, Shizuoka 422-8529, Japan. ahmhaya@agr.shizuoka.ac.jp
Hirano M
Nagata T
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