Bradyrhizobium bacteria
E213137
Bradyrhizobium bacteria are slow-growing, nitrogen-fixing soil microorganisms that form root nodule symbioses with leguminous plants, helping convert atmospheric nitrogen into a usable form.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Bradyrhizobium | 1 |
| Bradyrhizobium bacteria canonical | 1 |
| Bradyrhizobium japonicum | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1891637 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Bradyrhizobium bacteria Context triple: [Faboideae, symbiosisWith, Bradyrhizobium bacteria]
-
A.
Rhizobium bacteria
Rhizobium bacteria are soil-dwelling microorganisms that form nitrogen-fixing root nodules on leguminous plants, helping convert atmospheric nitrogen into a usable form for plant growth.
-
B.
Medicago
Medicago is a genus of leguminous plants best known for species like alfalfa, which are widely cultivated as high-protein forage crops and for soil improvement through nitrogen fixation.
-
C.
Rousselia
Rousselia is a genus of flowering plants in the hemp family Cannabaceae, native to tropical regions of the Americas.
-
D.
Heterodera glycines
Heterodera glycines is a plant-parasitic nematode known as the soybean cyst nematode, a major agricultural pest that significantly reduces soybean yields worldwide.
-
E.
Meloidogyne incognita
Meloidogyne incognita is a highly destructive root-knot nematode species that parasitizes a wide range of crops, causing characteristic root galls and significant agricultural yield losses worldwide.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Bradyrhizobium bacteria Target entity description: Bradyrhizobium bacteria are slow-growing, nitrogen-fixing soil microorganisms that form root nodule symbioses with leguminous plants, helping convert atmospheric nitrogen into a usable form.
-
A.
Rhizobium bacteria
Rhizobium bacteria are soil-dwelling microorganisms that form nitrogen-fixing root nodules on leguminous plants, helping convert atmospheric nitrogen into a usable form for plant growth.
-
B.
Medicago
Medicago is a genus of leguminous plants best known for species like alfalfa, which are widely cultivated as high-protein forage crops and for soil improvement through nitrogen fixation.
-
C.
Rousselia
Rousselia is a genus of flowering plants in the hemp family Cannabaceae, native to tropical regions of the Americas.
-
D.
Heterodera glycines
Heterodera glycines is a plant-parasitic nematode known as the soybean cyst nematode, a major agricultural pest that significantly reduces soybean yields worldwide.
-
E.
Meloidogyne incognita
Meloidogyne incognita is a highly destructive root-knot nematode species that parasitizes a wide range of crops, causing characteristic root galls and significant agricultural yield losses worldwide.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
bacterial genus
ⓘ
nitrogen-fixing bacterium ⓘ soil microorganism ⓘ |
| associatedWith |
cowpea
ⓘ
peanut ⓘ soybean ⓘ tree legumes ⓘ |
| benefitsHostBy | providing fixed nitrogen ⓘ |
| capability | biological nitrogen fixation ⓘ |
| cellShape | rod-shaped ⓘ |
| cellularLocationOfNitrogenase | bacteroids in root nodules ⓘ |
| class | Alphaproteobacteria ⓘ |
| converts | atmospheric nitrogen to ammonia ⓘ |
| distinguishedFrom | Rhizobium by slower growth ⓘ |
| enzymeSystem | nitrogenase complex ⓘ |
| etymology | derived from Greek for slow rod ⓘ |
| family |
Hyphomicrobiales
ⓘ
surface form:
Nitrobacteraceae
|
| firstDescribedBy | Jordan ⓘ |
| firstDescribedInYear | 1982 ⓘ |
| fixes | atmospheric nitrogen ⓘ |
| forms | root nodules ⓘ |
| formsSymbiosisWith | leguminous plants ⓘ |
| genomeFeature |
large genome size relative to many bacteria
ⓘ
symbiosis-related gene clusters ⓘ |
| gramStain | Gram-negative ⓘ |
| growthRate | slow-growing ⓘ |
| habitat |
rhizosphere of leguminous plants
ⓘ
soil ⓘ |
| impactOnEnvironment | reduces need for synthetic nitrogen fertilizers ⓘ |
| kingdom | Bacteria ⓘ |
| lifestyle | free-living in soil and symbiotic in nodules ⓘ |
| metabolism | aerobic ⓘ |
| order | Hyphomicrobiales ⓘ |
| oxygenRequirement | microaerophilic for nitrogen fixation ⓘ |
| phylum |
Proteobacteria
ⓘ
surface form:
Pseudomonadota
|
| receivesFromHost |
carbon sources
ⓘ
energy ⓘ |
| reproduction | binary fission ⓘ |
| requires | legume host for efficient nitrogen fixation in nature ⓘ |
| researchUse | model for legume–rhizobia symbiosis studies ⓘ |
| roleInAgriculture | biological fertilizer ⓘ |
| roleInEcosystem | key component of nitrogen cycle ⓘ |
| symbiosisNature | mutualistic ⓘ |
| symbiosisType | root nodule symbiosis ⓘ |
| taxonomicRank | genus ⓘ |
| usedAs | inoculant for legume crops ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Bradyrhizobium bacteria Description of subject: Bradyrhizobium bacteria are slow-growing, nitrogen-fixing soil microorganisms that form root nodule symbioses with leguminous plants, helping convert atmospheric nitrogen into a usable form.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Bradyrhizobium japonicum
this entity surface form:
Bradyrhizobium