African Journal of
Microbiology Research

  • Abbreviation: Afr. J. Microbiol. Res.
  • Language: English
  • ISSN: 1996-0808
  • DOI: 10.5897/AJMR
  • Start Year: 2007
  • Published Articles: 5228

Full Length Research Paper

Effects of Bacillus subtilis extracts on weed seed germination of Sorghum halepense and Amaranthus hybridus

E. K. Martínez-Mendoza1, H. G. Mena-Violante1, C. Méndez-Inocencio1, G. Oyoque-Salcedo1, H. Cortéz-Madrigal1, V. Olalde-Portugal2 and  M. V. Angoa-Pérez1*
1Department of Biotechnology, Centro Interdisciplinario de Investigación para el Desarrollo Integral Regional, IPN Michoacán, México. 2Department of Biotechnology and Biochemistry, Centro de Investigación y de Estudios Avanzados del IPN Irapuato, México.  
Email: [email protected]

  •  Accepted: 10 February 2012
  •  Published: 31 March 2012

Abstract

The effects of cell-free supernatants (S) and anionic fractions (Q) from three different strains of Bacillus subtilis were evaluated on weed seed germination. The plant growth promoting rhizobacteria (PGPR) strains DN and Car13, as well as a non-promoting strain (PY79), were tested on pigweed (Amaranthus hybridus L.) and Johnson grass (Sorghum halepense L. pers). The application of anionic fractions QCar13, QDN and QPY caused a drastic decrease in the germination rates of both pigweed and Johnson grass seeds relative to controls. These results suggest the presence of one or several metabolites capable of inhibiting germination in both weeds, while acting more effectively on dicotyledonous seeds. This work shows the potential of essayed fractions in weed control.

Key words: Bacterial metabolites, germination inhibition, weed control.

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This article is published under the terms of the Creative Commons Attribution License 4.0

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