Affiliation:
1. Department of Microbiology and the Center for Environmental Biotechnology, University of Tennessee, Knoxville, Tennessee 37996-1605
Abstract
ABSTRACT
A
tod-luxCDABE
fusion was constructed and introduced into the chromosome of
Pseudomonas putida
F1, yielding the strain TVA8. This strain was used to examine the induction of the
tod
operon when exposed to benzene, toluene, ethylbenzene, and xylene (BTEX) compounds and aqueous solutions of JP-4 jet fuel constituents. Since this system contained the complete
lux
cassette (
luxCDABE
), bacterial bioluminescence in response to putative chemical inducers of the
tod
operon was measured on-line in whole cells without added aldehyde substrate. There was an increasing response to toluene concentrations from 30 μg/liter to 50 mg/liter, which began to saturate at higher concentrations. The detection limit was 30 μg/liter. There was a significant light response to benzene,
m
- and
p
-xylenes, phenol, and water-soluble JP-4 jet fuel components, but there was no bioluminescence response upon exposure to
o
-xylene. The transposon insertion was stable and had no negative effect on cell growth.
Publisher
American Society for Microbiology
Subject
Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology
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