Question

what is rehizobium?how is it useful for some plants.

Answer 1

Rhizobium - Science Direct In these structures the bacteria are able to convert atmospheric nitrogen into ammonia, a process called nitrogen fixation. The ammonia is used by the plant as a nitrogen source. ... Members of the genus Rhizobium specifically form root nodules, but some other rhizobia can also form nodules on plant stems.
up is a genus of Gram-negative soilbacteria that fix nitrogen. Rhizobium species form an endosymbiotic nitrogen-fixingassociation with roots of legumes and Parasponia.

RhizobiumRhizobium tropici on an agar plate.Scientific classificationKingdom:

Bacteria

Phylum:

Proteobacteria

Class:

Alphaproteobacteria

Order:

Rhizobiales

Family:

Rhizobiaceae

Genus:

Rhizobium

Frank 1889

Type speciesRhizobium leguminosarum

Species[1]

See text.

The bacteria colonize plant cells within root nodules, where they convert atmospheric nitrogen into ammonia and then provide organic nitrogenous compounds such as glutamine or ureides to the plant. The plant, in turn, provides the bacteria with organic compounds made by photosynthesis.[2] This mutually beneficial relationship is true of all of the rhizobia, of which the genus Rhizobium is a typical example.
these structures the bacteria are able to convert atmospheric nitrogen into ammonia, a process called nitrogen fixation. The ammonia is usedby the plant as a nitrogen source. ... Members of the genus Rhizobiumspecifically form root nodules, butsome other rhizobia can also form nodules on plant stems.