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metadata.artigo.dc.title: Bradyrhizobium brasilense sp. nov., a symbiotic nitrogen-fixing bacterium isolated from Brazilian tropical soils
metadata.artigo.dc.creator: Costa, Elaine Martins da
Guimarães, Amanda Azarias
Vicentin, Rayssa Pereira
Ribeiro, Paula Rose de Almeida
Leão, Aniele Carolina Ribas
Balsanelli, Eduardo
Lebbe, Liesbeth
Aerts, Maarten
Willems, Anne
Moreira, Fatima Maria de Souza
metadata.artigo.dc.subject: Bradyrhizobium
Vigna unguiculata L.
Polyphasic taxonomy
Biological nitrogen fixation
Taxonomia polifásica
Fixação biológica de nitrogênio
metadata.artigo.dc.publisher: Springer Oct-2017
metadata.artigo.dc.identifier.citation: COSTA, E. M. da et al. Bradyrhizobium brasilense sp. nov., a symbiotic nitrogen-fixing bacterium isolated from Brazilian tropical soils. Archives of Microbiology, Berlin, v. 199, n. 8, p. 1211-1221, Oct. 2017.
metadata.artigo.dc.description.abstract: Four strains of rhizobia isolated from nodules of Vigna unguiculata (UFLA03-321T, UFLA03-320 and UFLA03-290) and Macroptilium atropurpureum (UFLA04-0212) in Brazilian soils were previously reported as a new group within the genus Bradyrhizobium. To determine their taxonomic position, these strains were characterized in this study using a polyphasic approach. The analysis of the 16S rRNA gene grouped the four strains with Bradyrhizobium pachyrhizi PAC48T. However, the concatenated sequence analysis of the two (recA and glnII) or three (atpD, gyrB and recA) housekeeping genes indicated that these strains represent a novel species of Bradyrhizobium, which is very closely related to B. pachyrhizi PAC48T and B. elkanii USDA 76T. Genomic relatedness analyses between the UFLA03-321T strain and B. elkanii USDA 76T and B. pachyrhizi PAC48T revealed an average nucleotide identity below 96% and values of estimated DNA–DNA hybridization below 70%, confirming that they represent genomically distinct species. Analysis of MALDI-TOF MS (Matrix-assisted laser desorption ionization-time-of-flight mass spectrometry) profiles and phenotypic characteristics also allowed differentiation of the novel species from its two neighboring species. In phylogenetic analysis of nodC and nifH genes, UFLA03-321T exhibited maximum similarity with B. tropiciagri CNPSo 1112T. The data suggest that these four UFLA strains represent a novel species, for which the name Bradyrhizobium brasilense sp. nov. is proposed, with UFLA03-321T (=LMG 29353 =CBAS645) as type strain. G + C content in the DNA of UFLA03-321T is 63.9 mol %.
metadata.artigo.dc.language: en_US
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