title: Chemical composition and antimicrobial activity of the essential oils of the Amazon Guatteriopsis species.
abstract: The essential oils of Guatteriopsis blepharophylla, Guatteriopsis friesiana and Guatteriopsis hispida were obtained by hydrodistillation and analysed by GC and GC/MS. The main compound found in the leaf oil of G. blepharophylla was caryophyllene oxide (1) (69.25%). The leaf oil of G. friesiana contained predominantly beta-eudesmol (2) (51.60%), gamma-eudesmol (3) (23.70%), and alpha-eudesmol (4) (14.56%). The major constituents identified in the leaf of G. hispida were beta-pinene (38.18%), alpha-pinene (30.77%) and (E)-caryophyllene (20.59%). The antimicrobial activity of the essential oils was evaluated against 11 species of microorganisms. The oil of G. friesiana exhibited significant antimicrobial activity for all microorganisms tested, whereas that of G. hispida and G. blepharophyla had potent activity against Rhodococcus equi with MIC of 50 microg mL(-1). The major constituents of each oil were also tested separately, and showed lower activity compared to the oils. Moreover, mixtures of the main constituents, in the same proportions found in G. friesiana and G. hispida oils, did not show the same activity as the original oils.
authors.affiliation: Department of Chemistry, Federal University of Paraná (UFPR), P.O. Box 19081, 81531-990 Curitiba, PR, Brazil.
authors.forename: Emmanoel V
authors.initials: EV
authors.lastname: Costa
authors.forename: Sirlei D
authors.initials: SD
authors.lastname: Teixeira
authors.forename: Francisco A
authors.initials: FA
authors.lastname: Marques
authors.forename: Marta C T
authors.initials: MC
authors.lastname: Duarte
authors.forename: Camila
authors.initials: C
authors.lastname: Delarmelina
authors.forename: Maria Lúcia B
authors.initials: ML
authors.lastname: Pinheiro
authors.forename: José R
authors.initials: JR
authors.lastname: Trigo
authors.forename: Beatriz Helena L N
authors.initials: BH
authors.lastname: Sales Maia
mesh_terms: D029061:Annonaceae / Q000737:chemistry*; D000900:Anti-Bacterial Agents / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology*; D008826:Microbial Sensitivity Tests; D050296:Microbial Viability / Q000187:drug effects; D015394:Molecular Structure; D009822:Oils, Volatile / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology*
chemical_list: D000900:Anti-Bacterial Agents; D009822:Oils, Volatile