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Applied and Environmental Microbiology, March 1999, p. 1133-1140, Vol. 65, No. 3
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
Isolation from Estuarine Sediments of a
Desulfovibrio Strain Which Can Grow on Lactate Coupled to
the Reductive Dehalogenation of 2,4,6-Tribromophenol
Alfred W.
Boyle,
Craig D.
Phelps, and
L. Y.
Young*
Biotechnology Center for Agriculture and the
Environment, Rutgers, The State University of New Jersey, New
Brunswick, New Jersey
Received 17 September 1998/Accepted 28 December 1998
Strain TBP-1, an anaerobic bacterium capable of reductively
dehalogenating 2,4,6-tribromophenol to phenol, was isolated from estuarine sediments of the Arthur Kill in the New York/New Jersey harbor. It is a gram-negative, motile, vibrio-shaped, obligate anaerobe
which grows on lactate, pyruvate, hydrogen, and fumarate when provided
sulfate as an electron acceptor. The organism accumulates acetate when
grown on lactate and sulfate, contains desulfoviridin, and will not
grow in the absence of NaCl. It will not utilize acetate, succinate,
propionate, or butyrate for growth via sulfate reduction. When supplied
with lactate as an electron donor, strain TBP-1 will utilize sulfate,
sulfite, sulfur, and thiosulfate for growth but not nitrate, fumarate,
or acrylate. This organism debrominates 2-, 4-, 2,4-, 2,6-, and
2,4,6-bromophenol but not 3- or 2,3-bromophenol or monobrominated
benzoates. It will not dehalogenate monochlorinated, fluorinated, or
iodinated phenols or chlorinated benzoates. Together with its
physiological characteristics, its 16S rRNA gene sequence places it in
the genus Desulfovibrio. The average growth yield of strain
TBP-1 grown on a defined medium supplemented with lactate and
2,4,6-bromophenol is 3.71 mg of protein/mmol of phenol produced, and
the yield was 1.42 mg of protein/mmol of phenol produced when 4-bromophenol was the electron acceptor. Average growth yields (milligrams of protein per millimole of electrons utilized) for Desulfovibrio sp. strain TBP-1 grown with
2,4,6-bromophenol, 4-bromophenol, or sulfate are 0.62, 0.71, and 1.07, respectively. Growth did not occur when either lactate or
2,4,6-bromophenol was omitted from the growth medium. These results
indicate that Desulfovibrio sp. strain TBP-1 is capable of
growth via halorespiration.
*
Corresponding author. Mailing address: Biotech Center,
Foran Hall, Cook College, Rutgers, The State University of New Jersey, 59 Dudley Rd., New Brunswick, NJ 08901-8520. Phone: (732) 932-8165, ext. 312. Fax: (732) 932-0312. E-mail:
Lyoung{at}aesop.rutgers.edu.
Applied and Environmental Microbiology, March 1999, p. 1133-1140, Vol. 65, No. 3
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
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