nitrobacter
Definition
Noun 1. A genus of rod-shaped bacteria: Nitrobacter is the scientific name for a genus of gram-negative, rod-shaped bacteria found in soil and water. These bacteria are chemolithoautotrophs, meaning they obtain energy by oxidizing inorganic compounds (specifically nitrite) and use carbon dioxide as their carbon source. 2. A key agent in the nitrogen cycle: Bacteria of the genus Nitrobacter play a critical ecological role by converting nitrite (NO₂⁻) into nitrate (NO₃⁻) in a process called nitrification. This makes nitrate available for plant absorption.
Usage Examples
- Scientific Context:
- The presence of Nitrobacter is essential for healthy soil fertility.
- Researchers studied the enzyme activity of Nitrobacter in the wastewater treatment process.
- General/Ecological Context:
- In the nitrogen cycle, Nitrobacter oxidizes nitrite to nitrate.
Advanced Usage
- Taxonomic Classification: The term is formally capitalized and italicized () when referring to the genus name, following biological nomenclature conventions. When used informally to refer to the bacteria in general, it may not be italicized.
- The genus Nitrobacter belongs to the family Nitrobacteraceae.
Variants and Related Words
- Nitrobacteria (plural noun): A term sometimes used to refer to bacteria of this genus collectively, or more broadly to nitrite-oxidizing bacteria.
- The filter is designed to promote the growth of nitrobacteria.
- Nitrobacteraceae (noun): The family of bacteria to which the genus belongs.
- Nitrite-oxidizing bacteria (NOB) (noun phrase): The functional group that includes and other genera that perform the same biochemical conversion.
Synonyms
- Nitrite oxidizer (noun): A descriptive synonym highlighting its function in the nitrogen cycle.
- Chemolithoautotroph (noun): A synonym describing its metabolic classification (inorganic energy source, carbon dioxide for carbon).
Related Phrases / Compound Terms
- Nitrification process: The two-step microbial process where converts ammonia to nitrite, and Nitrobacter converts nitrite to nitrate.
- Nitrogen cycle: The biogeochemical cycle in which Nitrobacter is a key participant.
- Biological filtration: A process, used in aquariums and wastewater treatment, that relies on bacteria like Nitrobacter to remove toxic nitrogen compounds.
Noun
-
rod-shaped soil bacteria
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