African Journal of
Plant Science

  • Abbreviation: Afr. J. Plant Sci.
  • Language: English
  • ISSN: 1996-0824
  • DOI: 10.5897/AJPS
  • Start Year: 2007
  • Published Articles: 718

Full Length Research Paper

Chemical characterization and antimicrobial activity of essential oils and Croton’s varieties modulator in the Brazilian’s Northeast semiarid

Elissandra C. Angélico
  • Elissandra C. Angélico
  • Programa de Pós-Graduação em Ciência Animal, Universidade Federal de Campina Grande- UFCG, Av. Sta Cecília, Bairro Jatobá, s/n, 58700970, Patos-PB. Cx Postal 64, Tel. 83-3511-3000, Patos – PB, Brasil.
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Onaldo G. Rodrigues*
  • Onaldo G. Rodrigues*
  • Laboratório Multiusuário em Pesquisas Ambientais, Universidade Federal de Campina Grande- UFCG, Av. Sta Cecília, Bairro Jatobá, s/n, 58700970, Patos-PB. Cx Postal 64, Tel. 83-3511-3000, Patos – PB, Brasil.
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José G. M. da Costa
  • José G. M. da Costa
  • Laboratório de Pesquisa de produtos Naturais- LPPN- Universidade Regional do Cariri, URCA, Campus do Pimenta, 63105-000, Crato-Ceará, Brasil.
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Maria de Fátima A. Lucena
  • Maria de Fátima A. Lucena
  • Laboratório Multiusuário em Pesquisas Ambientais, Universidade Federal de Campina Grande- UFCG, Av. Sta Cecília, Bairro Jatobá, s/n, 58700970, Patos-PB. Cx Postal 64, Tel. 83-3511-3000, Patos – PB, Brasil.
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Vicente Queiroga Neto
  • Vicente Queiroga Neto
  • Laboratório Multiusuário em Pesquisas Ambientais, Universidade Federal de Campina Grande- UFCG, Av. Sta Cecília, Bairro Jatobá, s/n, 58700970, Patos-PB. Cx Postal 64, Tel. 83-3511-3000, Patos – PB, Brasil.
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Rosália Severo de Medeiros
  • Rosália Severo de Medeiros
  • Laboratório Multiusuário em Pesquisas Ambientais, Universidade Federal de Campina Grande- UFCG, Av. Sta Cecília, Bairro Jatobá, s/n, 58700970, Patos-PB. Cx Postal 64, Tel. 83-3511-3000, Patos – PB, Brasil.
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  •  Received: 10 June 2014
  •  Accepted: 03 July 2014
  •  Published: 31 July 2014

Abstract

This study aimed to analyze the chemical composition and evaluate the antibacterial activity of essential oils and modulator of Croton heliotropiifolius Kunth and Croton blanchetianus Baill. The oils were obtained with distilled water and their components identified with GC/MS. Eucalyptol (16.9%), β-caryophyllene (15.9%) and germacrene-D (14.5%) for C. heliotropiifolius and cedrol (28.4%), eucalyptol (17, 4%) and α-pinene (10.5%) for C. blanchetianus were observed. The antimicrobial activity and minimum inhibitory concentration (MIC) was determined by the diffusion method and microdilution with standard bacteria Gram positive and negative. Preliminary results of the antibacterial activity showed that both oils were more effective against Gram-positive strain of Bacillus cereus. When verifying the minimum inhibitory concentration, it was observed that the essential oil of C. heliotropiifolius showed inhibitory activity only for the lineage multiresistance Staphylococcus aureus (MR 358), 512 μg/mL with MIC. For the essential oil of C. blanchetianus, the result was significant for S. aureus with an MIC of 64 mg/mL. The oil of C. blanchetianus potentiated the antibiotic amikacin, kanamycin and gentamycin against B. cereus strain, showing a synergistic effect.

 

Key words: Phytochemistry, antimicrobial, bacterial resistance, secondary metabolites.