HORTICULTURE

Detailed explanation-1: -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.

Detailed explanation-2: -Rhizobium bacteria in the root nodules of leguminous plants help in fixing nitrogen. Nitrogen has to be ‘fixed’ because plants cannot take up nitrogen directly from the atmosphere.

Detailed explanation-3: -Legumes are able to form a symbiotic relationship with nitrogen-fixing soil bacteria called rhizobia. The result of this symbiosis is to form nodules on the plant root, within which the bacteria can convert atmospheric nitrogen into ammonia that can be used by the plant.

Detailed explanation-4: -Rhizobium attaches to the roots of the leguminous plants resulting in the generation of root nodules. It forms a symbiotic association with the leguminous plants as it draws the nutrition from the plants and in turn helps with the fixation of nitrogen in the soil for the leguminous plants to take up.

Detailed explanation-5: -The Rhizobium or Bradyrhizobium bacteria colonize the host plant’s root system and cause the roots to form nodules to house the bacteria (Figure 4). The bacteria then begin to fix the nitrogen required by the plant.