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Denitrification by extremely halophilic bacteria
1Ames Research Center, Moffett Field, CA 94035, USA.
FEMS Microbiology Letters
|January 1, 1985
Summary
Extremely halophilic denitrifying bacteria were discovered in hypersaline environments. These microbes can convert nitrate into various nitrogen compounds under anaerobic conditions.
Area of Science:
- Microbiology
- Environmental Science
- Biogeochemistry
Background:
- Hypersaline environments are often characterized by unique microbial communities.
- The metabolic capabilities of extremely halophilic bacteria are not fully understood, particularly regarding anaerobic respiration.
Purpose of the Study:
- To isolate and identify extremely halophilic bacteria with denitrifying capabilities.
- To confirm the existence and potential prevalence of these bacteria in hypersaline habitats.
Main Methods:
- Isolation of bacteria using anaerobic enrichment techniques with nitrate.
- Analysis of gaseous products (nitrous oxide, dinitrogen) during anaerobic growth.
Main Results:
- Successful isolation of extremely halophilic bacteria from diverse locations.
- Demonstration of nitrate, nitrous oxide, and dinitrogen production during anaerobic growth by several isolates.
- Confirmation of denitrifying activity in extremely halophilic bacteria.
Conclusions:
- Extremely halophilic denitrifying bacteria have been confirmed to exist.
- These bacteria may be widespread in hypersaline environments, contributing to nitrogen cycling.