Title |
Chemical composition, antioxidant and antibacterial activities of essential oils from leaves and flowers of Eugenia klotzschiana Berg (Myrtaceae)
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Published in |
Anais da Academia Brasileira de Ciências, September 2017
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DOI | 10.1590/0001-3765201720160652 |
Pubmed ID | |
Authors |
Nárgella S Carneiro, Cassia C F Alves, José M Alves, Mariana B Egea, Carlos H G Martins, Thayná S Silva, Lizandra C Bretanha, Maira P Balleste, Gustavo A Micke, Eduardo V Silveira, Mayker L D Miranda |
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. |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Unknown | 104 | 100% |
Demographic breakdown
Readers by professional status | Count | As % |
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Student > Bachelor | 20 | 19% |
Student > Master | 17 | 16% |
Student > Ph. D. Student | 10 | 10% |
Student > Postgraduate | 8 | 8% |
Student > Doctoral Student | 6 | 6% |
Other | 14 | 13% |
Unknown | 29 | 28% |
Readers by discipline | Count | As % |
---|---|---|
Biochemistry, Genetics and Molecular Biology | 16 | 15% |
Agricultural and Biological Sciences | 16 | 15% |
Chemistry | 13 | 13% |
Pharmacology, Toxicology and Pharmaceutical Science | 7 | 7% |
Immunology and Microbiology | 5 | 5% |
Other | 12 | 12% |
Unknown | 35 | 34% |