Essential oil composition of four Artemisia species from Ethiopia

Abstract

ABSTRACT. The essential oil composition of four Artemisia species, namely A. schimperi Sch. Bip. ex Engl. A. abyssinica Sch. Bip. ex A. Rich., A. afra Jacq. ex Willd., and A. absinthium L. (previously called A. rehan) from Ethiopia has been studied. The essential oil obtained from A. absinthium (seedling from Europe) grown in two places in Ethiopia (Addis Ababa and Butajira) was also analyzed for comparison. Morphological study on the leaves of A. absinthium L. from Ethiopia (previously called A. rehan) and A. absinthium (from Europe) was also conducted. The essential oils were obtained by hydrodistillation using a Clevenger apparatus and analyzed by capillary GC and GC/MS. Forty three compounds representing 76 to 94% of the oils were identified. The composition of the essential oils of A. schimperi, A. afra and A. abyssinica are mainly dominated by irregular monoterpenes: yogomi alcohol (13.5-37.6%), artemisyl acetate (12.7-35.5%), and artemisia ketone (2.3-13.2%). The composition of the oil of A. absinthium (previously A. rehan) however, differs from the other three species in having camphor (21.2-28.3%) and davanone (21.3-26.5%) as major components. The composition of A. absinthum (Europe) was found to have β-thujone (42.3-66.4%) and chamazulene (11.3-24.2%) as major components. The study indicated that the composition of the essential oil of A. absinthium (previously A. rehan) is not only different from the other three species but also from A. absinthium from Europe and does not belong to any of the chemotypes described for the species in the literature. The morphological study on the leaves also showed that it differs from that of A. absinthium from Europe.

Chemical composition and antibacterial activity of essential oils from various parts of Gladiolus candidus, Ranunculus multifidus, Artemisia abyssinica and Crinum abyscinicum

“…Same parts of plants growing in different geographical regions were also reported to have different essential oil yields. It is noteworthy that the essential oil yield obtained herein from the leaves of A. abyssinica was found to be greater in comparison to the yield obtained by Asfaw et al for the same plant [22].…”

“…The essential oils composition of A. abyssinica reported by Nigist et al [22] from same plant collected from different area of Ethiopia were rich in 4-hydroxycyclohexanemethanol (21.3%), α-terpinolene (9.2%), yomogialcohol(38.5%), artemisylacetate (24.9%), and artemisiaalcohol (6.7%) [34] and 4,5-dihydroxyocta-3,5-diene-2,7-dione (55.0%) [35]. As clearly seen, there is a slight difference in the essential oil composition of A. abyssinica reported herein compared with the composition of essential oils reported for the same plant by Nigist et al [22]. The variation might be due to geographical location or variation due to environmental conditions [35].…”

“…The GC-MS analysis of essential oils from the leaves, stems and roots of A. abyssinica has led the identification of 70 compounds, accounting for about 65.94 % of the essential oil compositions. The major constituents of the essential oil of the leaves of A. abyssinica were D-limonene (3.15%) (22), linalool (13.96%) (1), 2-phenylethylbutanoate (3.22%) (23), and terpinen-4-ol (10.36%) (24). On the other hand, a total of 5 compounds were identified in the stems of A. abyssinica essential oils extract with the principal component found to be octadecanoic acid (97.34%) (25).…”

Chemical constituents and antioxidant activities of the fruits extracts of Piper capense

“…The cleaned and air dried fruits of P. capense (50 g) was powdered using grinder and subjected to hydro-distillation for 3 hours using Clevenger apparatus [8] to furnish 2.6-2.8% yellowish.…”

Effectiveness of essential oil from the Artemisia herba-alba aerial parts against multidrug-resistant bacteria isolated from food and hospitalized patients

“…However, it was detected previously as the major component in A-EO from Djelfa region of Algeria (36.1%) (Dahmani-Hamzaoui and Baaliouamer 2005), and southern Spain (51.2%) (Salido et al 2004). Moreover, this component dominates the EOs of other species of Artemisia such as A. absinthium collected from Ethiopia (21.3%) (Asfaw and Demissew 2015), A. abyssinica collected from three habitats in Yemen (49.4%, 43.5%, and 32.3%) (Chhetri et al 2015), and A. indica Willd. collected from Uttarakhand Himalaya (North of India) (30.80%) (Haider et al 2014).…”