Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/28950
Title: Promoção do crescimento vegetal e diversidade genética de bactérias isoladas de nódulos de feijão-caupi
Other Titles: Plant growth promotion and genetic diversity of bacteria isolated from cowpea nodules
Keywords: Fixação biológica de nitrogênio
Solubilização de fosfatos
Bactérias - Diversidade genética
Nodulação
Biological nitrogen fixation
Phosphate solubilization
Bacteria - Genetic diversity
Nodulation
Issue Date: Sep-2013
Publisher: Embrapa Secretaria de Pesquisa e Desenvolvimento
Citation: COSTA, E. M. da et al. Promoção do crescimento vegetal e diversidade genética de bactérias isoladas de nódulos de feijão-caupi. Pesquisa Agropecuária Brasileira, Brasília, v. 48, n. 9, p. 1275-1284, set. 2013.
Abstract: The objective of this work was to evaluate the potential for plant growth promotion and the genetic diversity of bacteria isolated from nodules of cowpea grown in Cerrado soils in the state of Piauí, Brazil. Twenty-six strains were evaluated as to their ability to fixate free-living nitrogen, solubilize inorganic phosphates, produce indole-3-acetic acid (IAA) in the absence and presence of tryptophan (100 mg L-1), produce nodules, and promote cowpea growth in Leonard jars. No strain was able to fixate free-living nitrogen, and 69% were able to solubilize calcium phosphate in vitro. In the presence of tryptophan, all strains were able to synthesize IAA in the 79 medium, and 80% synthesized IAA in the DYGS medium. Only four strains nodulated cowpea. The sequencing of the 16S rRNA gene identified the nodulating strains as belonging to the genera Bradyrhizobium, Rhizobium, Bacillus, and Paenibacillus. Among the non-nodulating strains able to promote cowpea growth are the genera Bacillus and Paenibacillus.
URI: http://repositorio.ufla.br/jspui/handle/1/28950
Appears in Collections:DCS - Artigos publicados em periódicos



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