rhizobium
Definition
Noun 1. A genus of bacteria: Rhizobium is the type genus of the family Rhizobiaceae. These bacteria are notable for their symbiotic relationship with certain plants. 2. A nitrogen-fixing bacterium: Rhizobium bacteria are commonly found in the root nodules of leguminous plants (legumes), where they convert atmospheric nitrogen into a form the plant can use.
Usage Examples
- Noun:
- The presence of Rhizobium in the soil is crucial for the health of crops like soybeans and peas.
- Farmers often inoculate seeds with Rhizobium to improve soil fertility naturally.
- Scientists study the symbiotic relationship between Rhizobium and legume roots.
Advanced Usage
- The term is often used in agricultural, biological, and environmental science contexts to discuss natural fertilization and sustainable farming practices.
- While is a specific genus, the term is sometimes used more loosely to refer to similar nitrogen-fixing bacteria (rhizobia) in a general sense within non-technical discussions.
Variants and Related Words
- Rhizobia (plural noun): A common term for bacteria, including those from the genus, that fix nitrogen in root nodules.
- Rhizobial (adjective): Relating to or characteristic of rhizobia bacteria. (e.g., rhizobial infection of the root).
Synonyms
- Nitrogen-fixing bacteria
- Symbiotic bacterium (in the context of legumes)
Notes on Meaning
- The core meaning of is taxonomic, referring to a specific scientific genus. Its defining characteristic is its ability to form nodules on legume roots and perform biological nitrogen fixation, which is its primary functional meaning in broader contexts.
Noun
-
the type genus of Rhizobiaceae; usually occur in the root nodules of legumes; can fix atmospheric oxygen
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