Chemical Composition and Biological Activities of Essential Oils of Eremanthus erythropappus (DC) McLeisch (Asteraceae)

Abstract

Abstract:The chemical composition of the essential oils obtained by hydrodistillation of different parts of Eremanthus erythropappus, including leaves, branches and inflorescences, was investigated by Gas Chromatography and Gas Chromatography/Mass Spectrometry. The antimicrobial activity of the oils was assessed by the disc diffusion and microdilution methods, while the antioxidant activity was evaluated by DPPH and reducing power tests. The main compounds found in the essential oils derived from the inflorescences and leaves were β-caryophyllene, germacrene-D, α-copaene and β-pinene. α-Bisabolol was the major component in the branches. The oils were active against Staphylococcus aureus, Streptococcus pyogenes and fungi, but not Escherichia coli and Pseudomonas aeruginosa. The MIC values ranged from 0.01 to 0.50 mg/mL. Using the DPPH test, the IC 50 values ranged from 38.77 ± 0.76 to 102.24 ± 1.96 μg/mL, while the reducing power test produced IC 50 values between 109.85 ± 1.68 and 169.53 ± 0.64 μg/mL. The results revealed that the E. erythropappus oils are new promising potential sources of antimicrobial and antioxidant compounds with good future practical applications for human health.

High-Resolution α-Glucosidase Inhibition Profiling Combined with HPLC-HRMS-SPE-NMR for Identification of Antidiabetic Compounds in Eremanthus crotonoides (Asteraceae)

“…comprises 27 species geographically restricted to the Brazillian Cerrado, but there are some exceptions, like E. crotonoides that can also be found in the Restinga [23]. Previous phytochemical analysis of the genus led to identification of flavonoids, quinic acid derivatives, terpenes and sesquiterpene lactones [23][24][25][26][27][28]. Despite the importance of Asteraceae as plant-based remedies for management of diabetes, there are no reports on investigations of the antidiabetic activity of Eremanthus species.…”

Histolocalization of chemotaxonomic markers in Brazilian Vernonieae (Asteraceae)

“…It is well know that Lychnophorinae produce metabolites of therapeutic importance, such as terpenoids (mono‐, sesqui‐, di‐ and triterpenes and sesquiterpene lactones) and phenolic compounds (flavonoids and cinnamic acid derivatives) (Vichnewski & Gilbert, ; Vichnewski et al ., ; Herz et al ., ; Dias Barros et al ., ; Oliveira et al ., ; Grael et al ., ; Dos Santos et al ., ; Kanashiro et al ., ; Taleb‐Contini et al ., ; Silvério et al ., ; Keles et al ., ; Dos Santos et al ., ; Baldin et al ., ; De Souza et al ., ; Abreu et al ., ; Silvério et al ., ; Gouvea et al ., ; Saúde‐Guimarães, Raslan & Oliveira, ). In addition, many studies have investigated the chemotaxonomy of Lychnophorinae because of the chemical richness that characterizes the subtribe (Bohlmann et al ., , b; Herz et al ., ; Bohlmann et al ., ; Zdero et al ., ; Bohlmann et al ., ; Bohlmann & Jakupovic, ; Borella et al ., ; Lunardello et al ., ; Borella et al ., ; Vichnewski et al ., ; Sacilotto, Sartori & Vichnewski, ; Sartori et al ., ; Sakamoto et al ., , ; Keles et al ., ; Sakamoto et al ., ; Souza et al ., ; Lusa et al ., ).…”

GC-MS and NMR analysis of the bioactive compounds from the crude extracts of Waltheria indica and the histopathological changes induced in albino rats challenged with Naja nigricollis venom

“…Bisabolol and bisabolol richoil have also demonstrated the capacity to enhance the percutaneous absorption of certain molecules and may prove to be an important ingredient for cosmetic and skin care products in the future [18,19].…”