African Journal of
Microbiology Research

  • Abbreviation: Afr. J. Microbiol. Res.
  • Language: English
  • ISSN: 1996-0808
  • DOI: 10.5897/AJMR
  • Start Year: 2007
  • Published Articles: 5124

Review

Biological nitrogen fixation by diazotrophic bacteria in association with grasses of economic importance

Erica de Oliveira Araújo*
  • Erica de Oliveira Araújo*
  • Faculty of Agricultural Sciences, Federal University of Great Dourados, Dourados-MS, Brazil.
  • Google Scholar
Antonio Carlos Tadeu Vitorino
  • Antonio Carlos Tadeu Vitorino
  • Faculty of Agricultural Sciences, Federal University of Great Dourados, Dourados-MS, Brazil.
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Fábio Martins Mercante
  • Fábio Martins Mercante
  • Embrapa Agropecuária Oest, Dourados-MS, Brazil
  • Google Scholar
Fábio Lopes Olivares
  • Fábio Lopes Olivares
  • State University of Nort Fluminense, Campos dos Goytacazes-RJ, Brazil
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  •  Received: 19 June 2014
  •  Accepted: 14 July 2014
  •  Published: 30 July 2014

Abstract

The capacity to transform atmospheric N2 into ammonia, which initially enhanced the research, has become just one of the potentialities verified by diazotrophic bacteria, and today, it is known that these microorganisms produce various plant-growth-promoting substances. Due to the enormous data obtained so far, diazotrophic bacteria have the potential to be used as biofertilizers in different crops or grasses, it is expected that the application of this alternative fertilizer will reduce the need for N application in these crops, since an efficient nitrogen use is an essential factor for a sustainable agriculture and the world agribusiness. Investment in research and diffusion of biological nitrogen fixation (BNF), through multidisciplinary and integrated studies can bring great benefit to the planet, increasing food production, reducing the use of fossil fuels and the contamination of water resources, by decreasing the use of external sources of nitrogenous fertilizers. Therefore, this review will show the characteristics of diazotrophic bacteria (nitrogen-fixing), their way of acting with microorganism endophytes and their contribution when in association with grasses of economic importance.

Key words: Endophytic diazotrophic bacteria, inoculant, biological nitrogen fixation (BNF), grass.