A molecular characterization of the Gunnera-Nostoc symbiosis: comparison with Rhizobium- and Agrobacterium-plant interactions

agrobacterium arabinosa arabinose bacteria cyanobacteria cyanophyta fixation de l'azote galactosa galactose genetica genetics glucuronic acid legumes leguminosas mucilage nitrogen fixation nostoc rhizobium root nodulation simbiosis sucre acide sugar acids symbiose symbiosis