Rhizobium bacteria live in the root [[1]] of leguminous plants.

Rhizobium bacteria live in the root nodules of leguminous plants. They stimulate the growth of nodules in the roots of the plant where they reside. Inside these nodules, Rhizobium bacteria convert atmospheric nitrogen into a usable form for the plant through the process of nitrogen fixation. This process provides the plant with a critical source of nitrogen for growth and development.