ISSN:
1432-072X
Keywords:
Key words Bacterial diversity
;
Chlorophenol
;
degradation
;
Groundwater
;
Toxicity
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Chlorophenol-degrading bacteria from a long-term polluted groundwater aquifer were characterized. All isolates degraded 2,4,6-trichlorophenol and 2,3,4,6-tetrachlorophenol at concentrations detected in the contaminated groundwater (〈 10 mg l–1). Pentachlorophenol was degraded by three isolates when present alone. In two gram-positive isolates, 2,3,4,6-tetrachlorophenol was required as an inducer for the degradation of pentachlorophenol. The gram-positive isolates were sensitive to pentachlorophenol, with an IC50 value of 5 mg/l. Isolates belonging to the Cytophaga/Flexibacter/Bacteroides phylum had IC50 values of 25 and 63 mg/l. Isolates belonging to α-, β- and γ-Proteobacteria generally tolerated the highest pentachlorophenol concentrations (〉 100 mg/l). Polychlorophenol-degrading capacity was found in strains of Nocardioides, Pseudomonas, Ralstonia, Flavobacterium, and Caulobacter previously not known to degrade polychlorophenols. In addition, six polychlorophenol-degrading sphingomonads were found.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s002030050698
Permalink