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Correlation of TCE cometabolism with growth characteristics on aromatic substrates in toluene-degrading bacteria

Paper ID Volume ID Publish Year Pages File Format Full-Text
4814 248 2006 7 PDF Available
Title
Correlation of TCE cometabolism with growth characteristics on aromatic substrates in toluene-degrading bacteria
Abstract

We have constructed a bacterial library consisting of 97 strains of toluene-degrading bacteria from soil and activated sludge samples for examining their physiological properties in terms of cometabolism of TCE. Large variation of TCE degradation ability was observed in Gram-positive and Gram-negative strains, as well as diverse patterns of availability of aromatics as a growth substrate. No clear correlation was observed between the number of available substrates for growth and TCE degradation ability. However, the growth on some of the aromatics showed positive or negative correlations with TCE degradation ability. Kendall correlation constants (tau) for the growth on cumene, m-xylene, p-xylene, and m-cresol with TCE degradation ability were statistically significant (P < 0.001): their values were −0.44, −0.31, −0.26, 0.37, respectively. Among 12 of aromatics, only m-cresol showed positive correlation with TCE degradation ability. These findings would be useful for enrichment and isolation of the microbes that have TCE-cometabolism ability, which is a selective disadvantage through the toxicity or competitive inhibition against growth substrates.

Keywords
Trichloroethylene (TCE); Biodegradation; Cometabolism; Aromatic compounds; Kendall correlation constants (tau); m-Cresol; Toluene-degrading bacteria; Substrate range
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Correlation of TCE cometabolism with growth characteristics on aromatic substrates in toluene-degrading bacteria
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 31, Issue 3, 1 October 2006, Pages 173–179
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us