EVERYDAY SCIENCE

Detailed explanation-1: -Rhizobium is the well-known nitrogen-fixing root nodule bacterial symbiont of legume plants (see ‘Rhizobia’). Recent studies have shown that this soil microorganism also develops natural, intimate, and sometimes beneficial endophytic associations with various cereal crops like rice, wheat.

Detailed explanation-2: -These plants have small swellings on their roots called nodules. Soil bacteria known as rhizobia live in these nodules. You may be able to dig up some clover roots and see the nodules.

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 and Bradyrhizobium (class of the Alphaproteobac-teria, order of the Rhizobiales) are Gram-negative nitrogen-fixing bacteria that occur either as free-living soil bacteria or in interaction with the roots of leguminous plants. Cohabitation leads to the development of root nodules.

Detailed explanation-5: -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.