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Reductive dehalogenation of halocarboxylic acids by the phototrophic genera Rhodospirillum and Rhodopseudomonas.

Applied and environmental microbiology (1997-08-01)
J E McGrath, C G Harfoot
ABSTRACT

Type strains of the purple nonsulfur species Rhodospirillum rubrum, Rhodospirillum photometricum, and Rhodopseudomonas palustris grew phototrophically on a number of two- and three-carbon halocarboxylic acids in the presence of CO2, by reductive dehalogenation and assimilation of the resulting acid. Strains of each of these species were able to grow on chloroacetic, 2-bromopropionic, 2-chloropropionic, and 3-chloropropionic acids at a concentration of 2 mM. Only R. palustris DSM 123 was able to grow on bromoacetic acid and then only at a reduced concentration of 1 mM. R. palustris ATCC 33872 (formerly R. rutila) was unable to grow on any of the substrates tested. The ability of these organisms to utilize halocarboxylic acids indicates that they may have a significant role to play in the removal of these environmental pollutants from illuminated anaerobic habitats such as lakes, waste lagoons, sediments of ditches and ponds, mud, and moist soil.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
2-Bromopropionic acid, 99%
Supelco
2-Bromopropionic acid solution, certified reference material, 1000 μg/mL in methyl tert-butyl ether

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