African Journal of
Microbiology Research

  • Abbreviation: Afr. J. Microbiol. Res.
  • Language: English
  • ISSN: 1996-0808
  • DOI: 10.5897/AJMR
  • Start Year: 2007
  • Published Articles: 5211

Full Length Research Paper

Effects of toxic and non-toxic crude extracts on different Microcystis species (Cyanobacteria)

Maria do Carmo Bittencourt-Oliveira1,2,3*, Danilo Camargo-Santos1,2, Ariadne do Nascimento Moura3, Ingrid Bardini Francisco1, Carlos Tadeu dos Santos Dias4, Renato José Reis Molica5 and Micheline Kézia Cordeiro-Araújo1,3
1Department of Biological Sciences, Luiz de Queiroz College of Agriculture, University of São Paulo, Av. Pádua Dias, 11, São Dimas, CEP 13418-900, Piracicaba, SP, Brazil. 2Graduating Program on Biological Sciences, São Paulo State University, UNESP, Av. 24-A, 1515, CEP 13506-900, Rio Claro, SP, Brazil. 3Graduating Program on Botany, Rural and Federal University of Pernambuco, R. Dom Manoel de Medeiros, S/N, Dois Irmãos, CEP 52171-030, Recife, PE, Brazil. 4Department  of Exact Sciences, Luiz de Queiroz College of Agriculture, University of São Paulo, Av. Pádua Dias, 11, São Dimas, CEP 13418-900, Piracicaba, SP, Brazil. 5Graduating Program on Ecology, Rural and Federal University of Pernambuco, R. Dom Manoel de Medeiros, S/N, Dois Irmãos, CEP 52171-030, Recife, PE, Brazil.
Email: [email protected]

  •  Accepted: 10 May 2013
  •  Published: 21 May 2013

Abstract

Our objective was to investigate crude extracts toxic (MC+) and non-toxic (MC-) effects on the growth of Microcystis panniformis, Microcystis aeruginosa and Microcystiswesenbergii. Cultures were submitted to extracts MC+ at 5 and 10 MC µg.L-1, and to MC- equivalent weight of these concentrations. Both crude extracts worked toward reducing the growth of M. wesenbergii and stimulating the growth of M. panniformis. Likewise, M. aeruginosa was inhibited by addition of crude MC- extract. The action of microcystins at concentrations commonly found in natural environments, plus the presence of other substances in intracellular M. aeruginosa produced differentiated effects in Microcystisspp.

 

Key words: Microcystis aeruginosa, Microcystis panniformis, Microcystis wesenbergii, allelopathy, crude extract, microcystin, phytoplankton, toxin

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

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