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http://dx.doi.org/10.5352/JLS.2018.28.4.483

Biological Degradation of Cypermethrin by Marine Bacteria, Cellulophaga lytica DAU203  

Lee, Je-Hoon (Department of Biotechnology, Dong-A University)
Lee, Yong-Suk (Department of Biotechnology, Dong-A University)
You, Ah-Young (Department of Microbiology, Busan National University)
Choi, Yong-Lark (Department of Biotechnology, Dong-A University)
Publication Information
Journal of Life Science / v.28, no.4, 2018 , pp. 483-487 More about this Journal
Abstract
Cypermethrin, a commonly used domestic and agricultural pyrethroid pesticide, is widely considered detrimental to the environment and to many organisms because of its residual property and toxicity. Cellulophaga lytica DAU203, isolated from coastal sediment, was chosen because it degrade cypermethrin. Cellulophaga lytica DAU203 effectively degraded cypermethrin, as the utilized carbon source and substrate, in a mineral salt medium. Effective factors, such as carbon source, nitrogen source, initial pH, and temperature, for cypermethtin biological degradation by Cellulophaga lytica DAU203 were analyzed by one factor at a time method. Temperature ($22{\sim}42^{\circ}C$), initial pH (5~9), and yeast extract concentration (0.1~2.5%[w/v]) were selected as the three most important factors. There were optimized at $33.4^{\circ}C$, pH 7.7, and 2.4%(w/v) by response surface methodology, respectively. The Box- Behnken design consisting of 46 experimental runs with three replicates was used to optimize the independent variables which significantly influenced the cypermethrin biological degradation. This model for cypermethrin degradation by Cellulophaga lytica DAU203 is highly significant (p<0.05). Under the optimized condition, Cellulophaga lytica DAU203 degraded approximately 83.7 % of the cypermethrin within 5 days. These results suggest that Cellulophaga lytica DAU203 may be useful for the biological degradation of cypermethrin in cypermethrin-contaminated environments.
Keywords
Bioremediation; cypermethrin; Cellulophaga lytica; DAU203; pyrethroid;
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