Phytochemical Profile, Preliminary Toxicity, and Antioxidant Capacity of the Essential Oils of <i>Myrciaria floribunda</i> (H. West ex Willd.) O. Berg. and <i>Myrcia sylvatica</i> (G. Mey) DC. (Myrtaceae)

• Main Authors: Ângelo Antônio Barbosa de Moraes (Author), Oberdan Oliveira Ferreira (Author), Leonardo Souza da Costa (Author), Lorena Queiroz Almeida (Author), Everton Luiz Pompeu Varela (Author), Márcia Moraes Cascaes (Author), Celeste de Jesus Pereira Franco (Author), Sandro Percário (Author), Lidiane Diniz do Nascimento (Author), Mozaniel Santana de Oliveira (Author), Eloisa Helena de Aguiar Andrade (Author)
• Format: Book
• Published: MDPI AG, 2022-10-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.

Summary

The essential oils (EOs) of <i>Myrciaria floribunda</i> (Mflo) and <i>Myrcia sylvatica</i> (Msyl) (Myrtaceae) were obtained by hydrodistillation. The analysis of volatile constituents was performed by GC/MS. Preliminary toxicity was assessed on <i>Artemia salina</i> Leach. The antioxidant capacity was measured by the ABTS^•+ and DPPH^• radical inhibitory activities. The results indicate that the Mflo EO had the highest yield (1.02%), and its chemical profile was characterized by high levels of hydrocarbon (65.83%) and oxygenated (25.74%) monoterpenes, especially 1,8-cineole (23.30%), terpinolene (22.23%) and α-phellandrene (22.19%). Regarding the Msyl EO, only hydrocarbon (51.60%) and oxygenated (46.52%) sesquiterpenes were identified in the sample, with (<i>Z</i>)-α-trans-bergamotene (24.57%), α-sinensal (13.44%), and (<i>Z</i>)-α-bisabolene (8.33%) at higher levels. The EO of Mflo exhibited moderate toxicity against <i>A. salina</i> (LC₅₀ = 82.96 ± 5.20 µg.mL⁻¹), while the EO of Msyl was classified as highly toxic (LC₅₀ = 2.74 ± 0.50 µg.mL⁻¹). In addition, relative to Trolox, the EOs of Mflo and Msyl showed significant inhibitory effects (<i>p</i> < 0.0001) against the DPPH^• radical. This study contributes to the expansion of chemical and biological knowledge on the EOs of Myrtaceae species from the Amazon region.

Item Description

10.3390/antiox11102076
2076-3921