02324naa a2200313 a 450000100080000000500110000800800410001902400350006010000210009524501350011626000090025152013690026065000140162965000130164365000150165665000150167165000120168665300400169865300120173870000200175070000250177070000220179570000200181770000250183770000250186270000250188770000280191277300700194020914902018-05-16       2018    bl uuuu     u00u1 u    #d7 a10.1016/j.bjm.2017.09.0072DOI1 aRODRIGUES, D. R.  aPhenotypic, genetic and symbiotic characterization of Erythrina velutina rhizobia from Caatinga dry forest.h[electronic resource]  c2018  aErythrina velutina (Mulungu) is a legume ree from Caatinga that associates with rhizobia but the diversity and symbiotic ability of mulungu rhizobia are poorly understood. The aim of this study was to characterize mulungu rhizobia from Caatinga. Bacteria were obteined from Serra Talhada and Caruaru in Caatinga under natural regeneration. The bacteria were evaluated to the amplication of nifH and nod C and to metabolic characteristics. Ten selected bacteria identied by 16S rRNA sequences. They were tested in vitro to NaCl and temperature tolerance, auxin production and calcium phosphate solubilization. The symbiotic ability were assessed in an greenhouse experiment. A total of 32 bacteria were obtained and 17 amplied both symbiotic genes. The bacteria showed a high variable metabolic prole. Bradyrhizobium (6), Rhizobium (3) and Paraburkholderia (1) were identied, differing from their geographic origin. The isolates grew up to 45 ◦ C to 0.51 mol L ? 1 of NaCl. Bacteria which produced more auxin in the medium with l -tryptophan and two Rhizobium and one Bradyrhizobium were phosphate solubilizers. All bacteria nodulated and ESA 90 (Rhizobium sp.) plus ESA 96 (Paraburkholderia sp.) were more efcient symbiotically. Diverse and efcient rhizobia inhabit the soils of Caatinga dry forests, with the bacterial differentiation by the sampling sites.  aBactéria  aCaatinga  aInoculante  aLeguminosa  aMulungu  aFixação biológica de nitrogênio  aRizobio1 aSILVA, A. F. da1 aCAVALCANTI, M. I. P.1 aESCOBAR, I. E. C.1 aFRAIZ, A. C. R.1 aRIBEIRO, P. R. de A.1 aFERREIRA NETO, R. A.1 aFREITAS, A. D. S. de1 aFERNANDES JUNIOR, P. I.  tBrazilian Journal of Microbiologygv. 49, n. 3, p. 503-512, 2018.