Phenotypic diversity of bacteria in root nodules of Dalbergia ecastaphyllum (L.) Taub. (Fabaceae)

Many species belonging to family Fabaceae are able establish symbiotic relationships with nitrogen-fixing bacteria. Studies developed Dalbergia ecastaphyllum (L.) Taub., for example, have demonstrated the potential of this species. In sense, study aimed analyze phenotypic characteristics rhizobia isolated from D. and identify whether these bacterial isolates capable establishing Vigna unguiculata Walp. seeds were sown in soil samples collected Japaratinga, Alagoas, Brazil, three zones located at different distances high tide line. At 60 days after emergence plants, nodulation roots was analyzed bacteria isolated. Subsequently, characterization carried out based on some criteria (growth time, type pH, colony color, mucus amount mucus). For test, V. used. total, 17 types identified, which 8 fast-growing 9 intermediate-growth. Regarding 7 phenotypes acidic neutral pH 2 alkaline pH. As coloring colonies, 5 yellow, white pink. It also observed presence consistent aqueous colonies areas. Only commercial inoculant efficient unguiculata.