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Phylogenetic and degradation characterization of Burkholderia cepacia WZ1 degrading herbicide quinclorac.

Strain WZI capable of degrading quinclorac was isolated from a pesticide manufactory soil and considered to be Burkholderia cepacia, belonged to bacteria, Proteobacteria, beta-Proteobacteria, based on morphology, physio-biochemical properties, whole cell fatty acid analysis and a partial sequencing of 16S rDNA. Strain WZ1 decomposed 90% of quinclorac at original concentration of 1000 mg L(-1) within 11 days. GC/MS analysis showed that the strain degraded quinclorac to 3,7-dichloro-8-quinoline and the cracked residue 2-chloro, 1,4-benzenedicarboxylic acid, indicating that the metabolic pathway was initiated by process of decarboxylation followed by cleavage of the aromatic ring. Stain WZ1 was also able to degrade some other herbicides and aromatic compounds, including 2,4,5-T, phenol, naphthalene and hydrochinone etc. This paper describes for the first time Phylogenetic and degradation characterization of a pure bacterium which, is able to mineralize quinclorac.[1]

References

  1. Phylogenetic and degradation characterization of Burkholderia cepacia WZ1 degrading herbicide quinclorac. Lü, Z., Min, H., Wu, S., Ruan, A. Journal of environmental science and health. Part. B, Pesticides, food contaminants, and agricultural wastes. (2003) [Pubmed]
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