Question

Suggest a suitable word for the following statements.
Nitrogen-fixing microorganism present in the root nodules of the legumes.

Answer 1

Hint: Nitrogen-fixing microorganisms help in the transformation of atmospheric nitrogen into fixing nitrogen through the inorganic compounds that are used by plants and these organisms affect nitrogen fixation and play an important role in the cycle of nitrogen.

Complete answer:
Rhizobium is the nitrogen-fixing bacteria that is present in the root nodules of the legumes. They make an endosymbiotic relationship of nitrogen-fixing association with the root legumes and Parasponia. This bacteria forms colonies with plant cells in the root nodules where the conversion of atmospheric nitrogen into ammonia takes place with the help of the enzyme nitrogenase and it provides organic nitrogenous compounds which include ureides and glutamine. The organic compounds made during photosynthesis are provided by the plant to the bacteria in return. All rhizobia perform this mutually beneficial relationship and are capable of solubilizing phosphorus.
The first cultivation of this microorganism was performed by Martinus Beijerinck by isolating and cultivating it from the nodules of legumes. Hip formed this in 1888 and called it Bacillus radicicola which is placed under the genus Rhizobium. The symbiotic relationship formed by the Rhizobium with plants such as legumes and fixing of nitrogen from the air into ammonia acts as a natural fertilizer for the plants. Rhizobium is described as a contaminant of DNA extraction kit and helps in the preparation of water systems which leads to an appearance in microbiota. It is described as a contaminant due to its usage of nitrogen gas in ultrapure water production which inhibits the microbial growth in the storage tanks.

Note:
Rhizobium is a motile microorganism that can be transported through water movements and animals from treatment to treatment. Rhizobium is a diazotrophic bacteria that is gram-negative and establishes in the roots of the plants which includes pulses and peas.