1 Agronomy Department, Federal Rural University of Pernambuco, Recife, Brazil 2 National Council for Research and Scientific and Technological Development, Brasília, Brazil Although signal exchange ...

Soil microbes known as rhizobia supply much-needed nitrogen to legumes such as clover (Trifolium species). In return, legumes shelter the rhizobia in nodules on their roots and provide them with ...

and represent 68% of the total global legume production (Vance 2001). The Rhizobium or Bradyrhizobium bacteria colonize the host plant’s root system and cause the roots to form nodules to house ...