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Provedor de dados:  Repositório Alice
País:  Brazil
Título:  Polyphasic characterization of bacteria obtainedfrom upland rice cultivated in Cerrado soil.
Autores:  BRAGA, L. F.
OLIVEIRA, F. A. de
COUTO, E. A. P. do
SANTOS, K. F. E. N.
FERREIRA, E. P. de B.
MARTIN-DIDONET, C. C. G.
Data:  2017-10-25
Ano:  2017
Palavras-chave:  Bacterial diversity
Associative bacteria
Arroz
Oryza sativa
Cerrado
Solo
Bactéria
Resumo:  This work aimed to characterize 20 isolates obtained from upland rice plants, based on phe-notypic (morphology, enzymatic activity, inorganic phosphate solubilization, carbon source use, antagonism), genotypic assays (16S rRNA sequencing) and plant growth promotion. Results showed a great morphological, metabolic and genetic variability among bacterial isolates. All isolates showed positive activity for catalase and protease enzymes and, 90%of the isolates showed positive activity for amylase, catalase and, nitrogenase. All isolates were able to metabolize sucrose and malic acid in contrast with mannitol, which was metab-olized only by one isolate. For the other carbon sources, we observed a great variability inits use by the isolates. Most isolates showed antibiosis against Rhizoctonia solani (75%) and Sclerotinia sclerotiorum (55%) and, 50% of them showed antibiosis against both pathogens. Six isolates showed simultaneous ability of antibiosis, inorganic phosphate solubilization and protease activity. Based on phylogenetic analysis of the 16S rRNA gene all the isolates belong to Bacillus genus. Under greenhouse conditions, two isolates (S4 and S22) improved to about 24%, 25%, 30% and 31% the Total N, leaf area, shoot dry weight and root dry weight, respectively, of rice plants, indicating that they should be tested for this ability under field conditions.
Tipo:  Artigo de periódico
Idioma:  Inglês
Identificador:  Brazilian Journal of Microbiology, v. 49, n. 1, p. 20-28, 2018.

1678-4405

http://www.alice.cnptia.embrapa.br/alice/handle/doc/1078148

10.1016/j.bjm.2017.04.004
Direitos:  openAccess
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