In conclusion, our results have verified the important effects of
co-inoculation with rhizobia and AM fungi on common bean
growth and the synergistic relationship between rhizobia and
AM fungi. These results show an interesting practical application for agricultural development in marginal lands that are often deficient in P. The symbiosis with rhizobia and mycorrhiza
under P limitation is a biological technology that may improve
symbiotic nitrogen fixation in leguminous plants for an agricultural development that would be friendly to the environment and the consumers.