Role of rhizobum in the nitrogen cycle
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Answer:
Rhizobium is a bacterium found in soil that helps in fixing nitrogen in leguminous plants. It attaches to the roots of the leguminous plant and produces nodules. These nodules fix atmospheric nitrogen and convert it into ammonia that can be used by the plant for its growth and development...
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Answer:
Rhizobium plural form rhizobia are prokaryotes whose main function involves the conversion of stable nitrogen gas in the atmosphere to a biologically useful form. Nitrogenase is an enzyme complex that reduces dinitrogen to ammonia.
A huge amount of energy is consumed during the nitrogen fixation and the nitrogenase enzymes are irreversibly inactivated by oxygen. Acetylene reduction assay is used to measure the nitrogenase activity. A very less portion of species is capable of carrying out nitrogen fixation. That is around two genera of archaea, twenty genera of cyanobacteria and much more.
A symbolic amount of nitrogen remains after the harvesting of grains even though a large amount of nitrogen is removed at the time of harvesting. It is mainly taken into account when there is no usage of nitrogen fertilizers. It is usually seen in less industrialized countries.
Nitrogen is one of the most supplied plant nutrients as it is one of the common deficiency found in soils. Several environmental concerns are raised regarding the supply of nitrogen to the soil.
Rhizobium infects the roots of leguminous plants. They are usually found in the soil and produce nodules after infecting the roots of the leguminous plants. As a result, nitrogen gas is fixed from the atmosphere. This nitrogen is made available to the plants that help in their growth and development. When the legume dies there will be a breakdown of nodules. As a result, Rhizobium is released back to the cell where it can infect a new host.
Specific strains of Rhizobium are required to make the nodules functional in order to carry out the process. This increases the yield of the crops. Legume inoculation has been an agricultural practice for several years and has constantly improved over time.