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Tracking nitrate reducers and denitrifiers in the environment
1Institut National de la Recherche Agronomique--UMR 1229 Microbiologie et Géochimie des Sols, 17 rue Sully, BV 86510, 21065 Dijon Cedex, France. philippo@dijon.inra.fr
Biochemical Society Transactions
|January 26, 2005
Summary
Microorganisms can respire nitrate in low-oxygen conditions, initiating denitrification. This process is crucial for the nitrogen cycle, returning atmospheric nitrogen and completing the cycle.
Area of Science:
- Microbiology
- Environmental Science
- Biochemistry
Background:
- Nitrate respiration is a key microbial process occurring in diverse bacteria and archaea under oxygen limitation.
- This process is the initial step in denitrification, vital for atmospheric nitrogen replenishment and completing the nitrogen cycle.
- Significant advancements in understanding the biochemistry and genetics of nitrate reductases have been made.
Purpose of the Study:
- To summarize recent progress in molecular approaches for studying nitrate-reducing microbial communities.
- To highlight the ecological significance of nitrate respiration and denitrification.
Main Methods:
- Review of molecular techniques applied to environmental studies.
- Focus on recent advancements in understanding nitrate reductase biochemistry and genetics.
Main Results:
- Nitrate respiration is widespread across diverse microbial taxa.
- Molecular methods offer powerful tools for ecological studies of nitrate reducers.
Conclusions:
- Molecular approaches are advancing our understanding of the ecology of nitrate-reducing communities.
- Nitrate respiration plays a critical role in global nitrogen cycling.