Specificity and promiscuity of common bean in the presence of different species and strains of rhizobia
Common bean; nitrogen, inoculation.
The common bean (Phaseolus vulgaris) is capable of establishing symbiosis with different strains of rhizobia, which characterizes its promiscuity. The replacement of synthetic fertilizers by inoculation with bacteria that perform biological N2 fixation (FBN) has stimulated research related to the efficiency of nitrogen fixation and specificity within these symbiotic relationships, with the aim of increasing bean productivity. As it is a promiscuous species, beans establish symbiosis with several rhizobia, not all of them with high efficiency for FBN, therefore the present project aims to investigate species with greater specificity, efficiency and promiscuity, to the detriment of the species Rhizobium tropici and Rhizobium freirei which are efficient strains through three experiments, all in Leonard pots on sterile substrate, in a greenhouse at Embrapa Agrobiologia.