Evaluation of seasonal chemical composition, antibacterial, antioxidant and anticholinesterase activity of essential oil fromEugenia brasiliensisLam.

Abstract

This study describes the seasonal composition and the antibacterial, antioxidant and anticholinesterase activity of the essential oil from Eugenia brasiliensis leaves. Analysis by using GC allowed the identification of 40 compounds. It was observed that the monoterpenes varied more (42%) than the sesquiterpenes (14%), and that the monoterpene hydrocarbons suffered the greatest variation throughout the year (64%). Major compounds were spathulenol in the spring (16.02 ± 0.44%) and summer (18.17 ± 0.41%), τ-cadinol in the autumn (12.83 ± 0.03%) and α-pinene (15.94 ± 0.58%) in the winter. Essential oils were tested for their antibacterial activity, and the best result was obtained from the autumn oil, with MIC = 500 μg mL(- 1) against Staphylococcus saprophyticus and Pseudomonas aeruginosa. Antioxidant activity was evaluated using DPPH, lipid peroxidation and iron-reducing power assays, as well as the anticholinesterase activity. Both tests showed a weak performance of the essential oils.

Antimycoplasmic activity and seasonal variation of essential oil of Eugenia hiemalis Cambess. (Myrtaceae)

“…That is contrary to what was generally described for Eugenia EOs in the literature ( Lima et al 2008;Siebert et al 2015).…”

“…These results were more promising than those of previous reports in the literature with EOs from the leaves of E. brasiliensis (Siebert et al 2015) and Thyme vulgaris (Arjoon et al 2012). …”

“…Essential oils (EOs) are complex mixtures of compounds characterised by a strong fragrance, produced by aromatic plants as secondary metabolites (Bakkali et al 2008;Siebert et al 2015).…”

Antioxidant potential of essential oil from Lavandula angustifolia in in vitro and ex vivo cultured liver cells

“…Essential oils (EO), concentrated hydrophobic liquids, containing volatile aromatic compounds such as terpenes and phenols, represent examples of them. Based on the cyclical system of conjugated double bonds in the molecule of the compound, spatial arrangement and the various substituents it can be assumed that many of EO manifest antioxidant properties [37][38][39]. A great advantage of EO is that they are able to penetrate into a tissue up to 100-times faster than water [40].…”

Spermostatic activity of Eugenia brejoensis and Myroxylon peruiferum essential oils toward human spermatozoa

“…Previous studies has showed the biomedical potentials of oils from Eugenia plants (Ogunwande et al, 2005;Siebert et al, 2015), including antifertility activities for Eugenia jambolana (Rajasekaran et al, 1988). Similarly, the presence of β-caryophyllene, a chemical component identified in Eugenia brejoensis, has been reported in the oil of Trachyspermum ammi which also has spermicidal action (Paul and Kang, 2011).…”