Chemical Composition, Antimicrobial and Antioxidant Activities of Eugenia Dysenterica DC Essential Oil

Abstract

Eugenia dysenterica DC is a native species from the Cerrado biome and can be found in several states of Brazil. This study evaluated the chemical composition, antimicrobial and antioxidant activities from the essential oils of a population collected in São Paulo state. Essential oils were obtained by conventional means, and their compositions were analyzed by GC-MS. Screening assays for antimicrobial activity were carried out by the microdilution method and the antioxidant potential was assessed by the DPPH scavenging method. The GC-MS analysis indicated that 52.63% of the essential oil is composed by oxygenated sesquiterpenes and the major compound is (-)-elema-1,3,11(13)-trien-12-ol (24.86%). The antimicrobial assay indicated MIC 42.1 µg/mL for S. aureus and MIC > 10000 µg/mL for the other tested microorganisms, Gram negative bacteria and fungi. The oil showed an IC50 of 5.4±0.632 mg/mL for in the DPPH assay. The essential oil had a different chemical composition from previous studies. The essential oil did not present a potent antioxidant activity. However, it can be considered a promising antimicrobial agent against S. aureus.

Evaluation of phenolic compounds and antioxidant activity in some edible flowers

“…Sweet William flowers with red or coloration, usually associated with high AOA, possessed, nevertheless, a low antioxidant value. In addition, differences were observed for species analysed, which is in accordance withOliveira et al (2018). The values of AOA obtained by ABTS assay were similar to those obtained by Li et al(2014) for Chinese flowers (0.4-25 mg g −1 ).…”

Chemical Composition and Antioxidant Activity of Essential Oils from Leaves of Two Specimens of Eugenia florida DC.

“…Nonetheless, there are reports of this activity for essential oils obtained from other species of the genus Eugenia , such as the essential oil of E. uniflora , composed mainly of curzerene (50.6%), selina-1,3,7(11)-trien- 8-one (43.1%) and selina-1,3,7(11)-trien-8-one epoxide (30.4%), which presented potential antioxidant activity both by the TEAC and by the DPPH method [ 58 ]. Similarly, the essential oil from the leaves of E. dysenterica , composed mostly of (−)-elema-1,3,11(13)-trien-12-ol (24.86%), junenol (6.24%) and δ-cadinene (5.33%), also showed antioxidant activity by the DPPH method, of 5.4 mg/mL [ 59 ]. In another study, carried out by [ 60 ], the essential oil of E. caryophyllata , characterized mostly by eugenol (90.3%), ( E )–caryophyllene (4.83%) and eugenol acetate (1.87%), showed an elimination percentage of 95.6% of antioxidant activity by the method of DPPH, at a concentration of 10,000 μg/mL.…”