Chlorate and nitrate reduction pathways are separately induced in the perchlorate-respiring bacterium Dechlorosoma sp. KJ and the chlorate-respiring bacterium Pseudomonas sp. PDA

The effect of nitrate on perchlorate and chlorate reduction by perchlorate-respiring bacteria (PRB), and on chlorate reduction by chlorate-respiring bacteria (CRB), is not well understood, particularly with respect to the induction of pathways used to degrade these different chemicals. Based on kine...

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Bibliographic Details
Published in:Water research (Oxford) 2004-02, Vol.38 (3), p.673-680
Main Authors: Xu, Jianlin, Trimble, John J., Steinberg, Lisa, Logan, Bruce E.
Format: Article
Language:English
Subjects:
Anaerobic respiration
Applied sciences
Bacteria, Anaerobic - physiology
Biodegradation
Biodegradation, Environmental
Biological and medical sciences
Biological treatment of waters
Biotechnology
Chlorate
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Environment and pollution
Exact sciences and technology
Fundamental and applied biological sciences. Psychology
Groundwaters
Industrial applications and implications. Economical aspects
Kinetics
Natural water pollution
Nitrate
Nitrates - metabolism
Oxidoreductases - biosynthesis
Oxidoreductases - pharmacology
Perchlorate
Perchlorates - metabolism
Pollution
Pollution, environment geology
Pseudomonas - physiology
Rocket propellent
Sodium Compounds - metabolism
Soil Pollutants - metabolism
Water Pollutants - metabolism
Water treatment and pollution
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Summary:The effect of nitrate on perchlorate and chlorate reduction by perchlorate-respiring bacteria (PRB), and on chlorate reduction by chlorate-respiring bacteria (CRB), is not well understood, particularly with respect to the induction of pathways used to degrade these different chemicals. Based on kinetic data obtained in a series of batch tests, we determined that perchlorate respiratory enzymes were inducible (by chlorate or perchlorate) and separate from those used for denitrification by PRB strain Dechlorosoma sp. KJ. Aerobically grown cultures of KJ had lag times of greater than 0.3–2 days when transferred to a medium containing only perchlorate, chlorate, or nitrate as an electron acceptor. There were no lag times for transfers between identical media. Washed cells reduced very little nitrate (
ISSN:0043-1354
1879-2448
DOI:10.1016/j.watres.2003.10.017