Biodegradation of cypermethrin by Micrococcus sp. strain CPN 1.
A bacterium capable of utilizing pyrethroid pesticide cypermethrin as sole source of carbon was isolated from soil and identified as a Micrococcus sp. The organism also utilized fenvalerate, deltamethrin, perimethrin, 3-phenoxybenzoate, phenol, protocatechuate and catechol as growth substrates. The organism degraded cypermethrin by hydrolysis of ester linkage to yield 3-phenoxybenzoate, leading to loss of its insecticidal activity. 3-Phenoxybenzoate was further metabolized by diphenyl ether cleavage to yield protocatechuate and phenol as evidenced by isolation and identification of metabolites and enzyme activities in the cell-free extracts. Protocatechuate and phenol were oxidized by ortho-cleavage pathway. Thus, the organism was versatile in detoxification and complete mineralization of pyrethroid cypermethrin.
Tallur
Preeti N
PN
Department of Biochemistry, Karnataka University, Dharwad 580003, India.
Megadi
Veena B
VB
Ninnekar
Harichandra Z
HZ
D001673:Biodegradation, Environmental; D053858:Metabolic Networks and Pathways; D008837:Micrococcus / Q000254:growth & development / Q000378:metabolism*; D010084:Oxidation-Reduction; D011722:Pyrethrins / Q000378:metabolism*; D012988:Soil Microbiology
D011722:Pyrethrins; C017160:cypermethrin