Cells of root nodules of leguminous plants fix nitrogen. State True or False. Correct the false statements.

False

Bacteria called as Rhizobium present in the root nodules of leguminous plants fix nitrogen. It is a soil bacterium that fix nitrogen from the atmosphere once it is contained inside the leguminous plant roots. Nitrogen fixation can not be performed independently. Therefore, rhizobium needs a host of plants. Rhizobium is a key nitrogen source for agricultural soils, including those in arid areas. They turn the dinitrogen into ammonia. Ammonia, being poisonous, is absorbed easily into organic compounds.

  • Plants cannot fix atmospheric nitrogen on their own, but require it in some form to make amino acids and proteins.
  • Rhizobium multiplies within the cortex cells and forms nodules, and the nodules turn pink as the nitrogen fixation starts.

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