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

Abstract

Eugenia florida DC. belongs to the Myrtaceae family, which is present in almost all of Brazil. This species is popularly known as pitanga-preta or guamirim and is used in folk medicine to treat gastrointestinal problems. In this study, two specimens of Eugenia florida (Efl) were collected in different areas of the same region. Specimen A (EflA) was collected in an area of secondary forest (capoeira), while specimen B (EflB) was collected in a floodplain area. The essential oils (EOs) were extracted from both specimens of Eugenia florida by means of hydrodistillation. Gas chromatography coupled to mass spectrometry (GC/MS) was used to identify the volatile compounds present, and the antioxidant capacity of the EOs was determined by antioxidant capacity (AC-DPPH) and the Trolox equivalent antioxidant (TEAC) assay. For E. florida, limonene (11.98%), spathulenol (10.94%) and α-pinene (5.21%) were identified as the main compounds of the EO extracted from sample A, while sample B comprised selina-3,11-dien-6α-ol (12.03%), eremoligenol (11.0%) and γ-elemene (10.70%). This difference in chemical composition impacted the antioxidant activity of the EOs between the studied samples, especially in sample B of E. florida. This study is the first to report on the antioxidant activity of Eugenia florida DC. essential oils.

Phytochemical Profile and Herbicidal (Phytotoxic), Antioxidants Potential of Essential Oils from Calycolpus goetheanus (Myrtaceae) Specimens, and in Silico Study

“…These results confirm that the antioxidant potentials of the samples were lower than the Trolox standard, and lower when compared to the DPPH assay. This difference is evident in both tests, as observed in other studies reported in the literature [ 48 , 49 , 50 ].…”

Myrcia paivae O.Berg (Myrtaceae) Essential Oil, First Study of the Chemical Composition and Antioxidant Potential

“…On the other hand, the essential oil inhibited the DPPH • radical in a significant manner ( p = 0.001) in comparison with the standard. Such results show that there was a difference in antioxidant capacity, and this difference was also observed in the study carried out by [ 4 ], in the essential oil of two specimens of Eugenia Florida collected in Magalhães Barata, Pará, Brazil.…”

“…The chemical composition of the EO of M. Paivae was analyzed using a Shimadzu QP-2010 plus (Kyoto, Japan), a gas chromatography system equipped with a capillary column (30 m × 0.25 mm; 0.25 µm film thickness) coupled with a mass spectrometer (GC/MS) (Shimadzu, Kyoto, Japan). The programed temperature was maintained at 60–240 °C at a rate of 3 °C/min, with an injector temperature of 250 °C, helium as the carrier gas (linear velocity of 32 cm/s, measured at 100 °C), and a splitless injection (1 μL of a 2:10 hexane solution), using the same operating conditions as described in the literature [ 3 , 4 , 5 ]. The components were quantified using gas chromatography (GC) on a Shimadzu QP-2010 system (Kyoto, Japan), equipped with a flame ionization detector (FID) (Kyoto, Japan), under the same operating conditions as before, except the carrier was hydrogen gas.…”

“…They are obtained from various parts of these plants, such as: leaves, flowers, fruits, seeds, buds, rhizomes, roots, and barks [ 1 , 2 , 3 ]. Essential oils play a key role in plant organisms, acting as antimicrobial agents [ 4 , 5 , 6 ].…”

Antioxidant and Anti-Inflammatory Effects of Thyme (Thymus vulgaris L.) Essential Oils Prepared at Different Plant Phenophases on Pseudomonas aeruginosa LPS-Activated THP-1 Macrophages

“…The p-cymene (20.64%), linalool (2.15%), carvacrol (2.9%), and ( E )-caryophyllene (1.92%) were detected at higher levels in TEO/end of flowering. These compounds also possess antioxidant activity [ 40 , 42 , 43 , 44 ]. TEO/beginning of flowering contained more myrcene (1.45%)-, α -terpinene (1.4%)-, and γ -terpinene (15.18%)-active compounds, which also have antioxidant effects [ 45 , 46 , 47 ].…”