Chemical composition, antioxidant and antibacterial activities of essential oils from leaves and flowers of Eugenia klotzschiana Berg (Myrtaceae)
AUTOR(ES)
CARNEIRO, NÁRGELLA S., ALVES, CASSIA C.F., ALVES, JOSÉ M., EGEA, MARIANA B., MARTINS, CARLOS H.G., SILVA, THAYNÁ S., BRETANHA, LIZANDRA C., BALLESTE, MAIRA P., MICKE, GUSTAVO A., SILVEIRA, EDUARDO V., MIRANDA, MAYKER L.D.
FONTE
An. Acad. Bras. Ciênc.
DATA DE PUBLICAÇÃO
31/07/2017
RESUMO
ABSTRACT Many essential oils (EOs) of different plant species possess interesting antimicrobial effects on buccal bacteria and antioxidant properties. Eugenia klotzschiana Berg (pêra-do-cerrado, in Portuguese) is a species of Myrtaceae with restricted distribution in the Cerrado. The essential oils were extracted through the hydrodistillation technique using a modified Clevenger apparatus (2 hours) and chemically characterized by GC-MS. The major compounds were α-copaene (10.6 %) found in oil from leaves in natura, β-bisabolene (17.4 %) in the essential oil from dry leaves and α-(E)-bergamotene (29.9 %) in oil from flowers. The antioxidant activity of essential oils showed similarities in both methods under analysis (DPPH and ABTS˙+) and the results suggested moderate to high antioxidant activity. The antibacterial activity was evaluated by determining minimum inhibitory concentrations (MICs), using the microdilution method. MIC values below 400 µg/mL were obtained against Streptococcus salivarius (200 µg/mL), S. mutans (50 µg/mL), S. mitis (200 µg/mL) and Prevotella nigrescens (50 µg/mL). This is the first report of the chemical composition and antibacterial and antioxidant activities of the essential oils of E. klotzschiana. These results suggest that E. klotzschiana, a Brazilian plant, provide initial evidence of a new and alternative source of substances with medicinal interest.
Documentos Relacionados
- Eugenia neonitida Sobral and Eugenia rotundifolia Casar. (Myrtaceae) essential oils: composition, seasonality influence, antioxidant activity and leaf histochemistry
- Chemical composition and antibacterial activities from the essential oils of myrtaceae species planted in Brazil
- Essential Oils from Croton Species: Chemical Composition, in vitro and in silico Antileishmanial Evaluation, Antioxidant and Cytotoxicity Activities
- Topical antiinflammatory activity and chemical composition of the epicuticular wax from the leaves of Eugenia beaurepaireana (Myrtaceae)
- Chemical composition of essential oils of leaves, flowers and fruits of Hortia oreadica