Etude De L’Activité Antioxydante Des Huiles Essentielles De Plantes Aromatiques Et Médicinales Marocaines

Abstract

Morocco is a traditional supplier of medicinal and aromatic plants to the world. This activity has resulted to the exploitation of wild plants than dried plants for herbal needs and food flavors. Many species are used for the production of plant extracts and other aromatic essences mainly for the pharmaceutical and cosmetics industry. Among these metabolites, there are essential oils that are mixtures of aromatic substances present in the form of tiny droplets in the leaves, fruit peel, resin, branches, and wood. These oils, however, is endowed with antioxidant properties. This study aims to evaluate the antioxidant activity of essential oils of three moroccan aromatic and medicinal plants: Thymus vulgaris, Mentha spicata, and Citrus limonum. The oil extraction was performed by steam distillation in a Clevenger type apparatus. Also, the antioxidant activity of these oils was evaluated by the method of DPPH (2,2-diphenyl-1-picrylhydrazyl), in comparison with the antioxidant synthetic, ascorbic acid. In the present work, the results showed that the antioxidant activity of three essential oils studied by the trapping method of free radical is moderate. Also, the oil of Thymus vulgaris has a strong activity which exceeds that of ascorbic acid. This was followed by the European Scientific Journal April 2017 edition Vol.13, No.12 ISSN: 1857 -7881 (Print) RésuméLe Maroc est un fournisseur traditionnel du marché mondial en plantes aromatiques et médicinales. Cette activité met en exploitation aussi bien des plantes spontanées que des plantes séchées pour les besoins d'herboristerie et les aromates alimentaires. Un grand nombre d'espèces sont utilisées pour la production des essences végétales et autres extraits aromatiques destinés essentiellement à l'industrie pharmaceutique et cosmétique. Parmi ces métabolites, on trouve les huiles essentielles qui sont des mélanges de substances aromatiques présentes sous forme de minuscules gouttelettes dans les feuilles, les écorces des fruits, la résine, les branches et le bois. Ces huiles représentent un groupe très intéressant, qui sont dotés de propriétés antioxydantes. Cette étude a pour objectif d'évaluer l'activité antioxydante des huiles essentielles de trois plantes aromatiques et médicinales marocaine : Thymus vulgaris, Mentha spicata et Citrus limonum. L'extraction des huiles a été réalisée par hydrodistillation dans un appareil de type Clevenger et l'activité antioxydante de ces huiles a été évaluée par la méthode de DPPH (2,2-diphenyl-1-picrylhydrazyl), en comparaison avec l'antioxydant synthétique, l'acide ascorbique. Dans le présent travail, les résultats obtenus ont montré que l'activité antioxydante des trois huiles essentielles étudiées selon la méthode de piégeage du radical libre est modérée et que l'huile du Thymus vulgaris a une forte activité qui dépasse celle de l'acide ascorbique suivie de l'huile du Mentha spicata tandis que la plus faible activité a été observée chez Citrus limonum.

In Vitro Antiplasmodial, Cytotoxicity, and Antioxidant Activities of Lophira lanceolata (Ochnaceae): A Cameroonian Plant Commonly Used to Treat Malaria

“…This study demonstrated that iron reduction is dose-dependent since it changes depending on the concentration and ascorbic acid has a substantially higher potential to reduce Fe 3+ than the aqueous and ethanol extracts. These findings corroborate with those made in Morocco by Ismaili et al [ 28 ], who also showed this dose-dependent relation. The activity observed can be due to the chemical components of the plant.…”

Antioxidant and antifungal activities of essential oils from Algerian spontaneous plants against five strains of Fusarium spp.

“…Furthermore, with IC50 of 0.005 mg/ml, M. piperita EO from Turkey was more active than that of our study (Kizil et al, 2010). However, the activity of T. vulgaris EO is signifi cant compared to other EOs from Morocco (4.57 mg/ml) (Ismaili et al, 2017).…”

Checklist of the medicinal flora used by the local population in the province of Taza (north-eastern Morocco) through an ethnobotanical study

“…Compiling this checklist of medicinal plant species in Taza province can help in conservation efforts (protection of rare or endangered species), preserve traditional knowledge, ensure their availability to future generations, guide research efforts, ensure the sustainability of important species, and the economic development of the province (source of income for the communities). Contextualizing the checklist (202 medicinal species) at the country level (Morocco), we find that it constitutes 23.41 % of the Moroccan medicinal flora found in Ennabili et al (2023), 33.67 % of the Moroccan species classified as aromatic or medicinal (600 species) Botanical Sciences / Online First Botanical Sciences / Online First according to Ismaili et al (2021) and 40.40 % of Moroccan medicinal species (500 species) economically important according to Ennabili et al (2000). The number of families found constitutes 72.11 % of the 104 botanical families found recently in Ennabili et al (2023).…”

“…Many ethnobotanical surveys carried out consist of developing questionnaires (often semi-structured) intended for the people questioned. Some surveys have covered the entire kingdom (Bellakhdar 1997a, Bnouham et al 2002, Ismaili et al 2021, while others have been conducted in different regions over the past 25 years (Ziyyat et al 1997, Ennabili et al 2000, Jouad et al 2001, Eddouks et al 2002, El Hilaly et al 2003, Hseini & Kahouadji 2007, Tahraoui et al 2007, Benkhnigue et al 2010, 2014, El Amrani et al 2010, Hanae 2012, Khabbach et al 2012, Ghourri et al 2013, Hassani et al 2013, Bousta et al 2014, El Yahyaoui et al 2015, Daoudi et al 2016, Mikou et al 2016, Barkaoui et al 2017, Benali et al 2017, Bouyahya et al 2017, Laadim et al 2017, Boulfia et al 2018, El Haouari et al 2018, Chaachouay et al 2019Fatiha et al 2019, Mrabti et al 2019, Zougagh et al 2019, Hayat et al 2020, Idm'hand et al 2020, Mechchate et al 2020, Merrouni et al 2021, Kachmar et al 2021, Beniaich et al 2022, El Khomsi et al 2022…”

“…The number of strictly endemic is equal to 640 species, representing 16.3 % of the national inventory (Fennane & Ibn Tattou 2012). Of more than 4,000 identified Moroccan species, 800 are endemic and 600 are classified as aromatic or medicinal (Ismaili et al 2021). 500 medicinal plants are economically important (Ennabili et al 2000).…”