Resumo

BUITRAGO, Diolimar; VELASCO, Judith; DIAZ, Tulia  e  MORALES, Antonio. Chemical composition and antibacterial activity of the essential oil of Monticalia Imbricatifolia Schultz (Asteraceae). Rev. latinoam. quím [online]. 2012, vol.40, n.1, pp.13-18. ISSN 0370-5943.

Essential oil from fresh aerial parts of Monticalia imbricatifolia Schultz., was isolated by hydrodistillation and analyzed by GC/MS. A yield of 0.18% was obtained. Eleven components were identified by comparison of their mass spectra with the Wiley GC-MS Library data and the retention indices (RI) calculated for every compound. The major components were monoterpenes: α-phellandrene (33.89%), β-phellandrene (19.28%), α-pinene (16.81%) y β-pinene (10.97%). Antibacterial activity of the essential oil of this species was evaluated against Staphylococcus aureus (ATCC 25923), Enterococcus faecalis (ATCC 29212), Escherichia coli (ATCC 25922), Pseudomonas aeruginosa (ATCC 27853) and Klebsiella pneumoniae (ATCC 23357), using the disc diffusion agar method. The results showed the oil is highly effective against all tested bacteria, with minimal inhibitory concentration (MIC) values ranging from 20 to 60 µg/ml.

Palavras-chave : Monticalia imbricatifolia; Asteraceae; essential oil; antibacterial activity.