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Chemical Composition and Antibacterial Activity of Essential Oils from <i>Struchium sparganophora</i>Linn. Ktze Asteraceae

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Advances in Biological Chemistry 2014年第4期4卷 246-252页

作者： Lateef S. Kasim Kafayat O. Olaleye A. B. Fagbohun S. F. Ibitoye O. E. Adejumo Department of Pharmaceutical and Medicinal Chemistry Olabisi Onabanjo University Sagamu Nigeria

Struchium sparganophora Linn. Ktze Asteraceae is a culinary herb that is consumed in the Western part of Nigeria and has wide medicinal uses in traditional medicine. The present study was carried out to determine the chemical composition of the oils from its leaf and stem and their antibacterial activity. Essential oils were collected from the leaf and stem of Struchium sparganophora by hydrodistillation and analysed by GC and GC-MS. The antimicrobial activity was tested against Gram negative (G-ve) and Gram positive (G + ve) microorganisms obtained from the Medical Microbiology Unit, University College Hospital (UCH), Ibadan, Nigeria. Forty-six compounds were identified in the leaf representing 95.3% of the total oil while fifty-five compounds were identified in the stem representing 93.5% of the oil. β-caryophyllene, germacrene A, a-humulene and germacrene D represented the major components in both oils. Antibacterial activity of the oils against certain strains of bacteria showed that the different concentrations of the oils (100 – 10,000 ppm) from the leaf had activity ranging from 9.0 ± 1.0 to 14.3 ± 2.55 mm while that from the stem had activity ranging from 18.5 ± 2.2 to 20.0 ± 0.0 mm for both *** G + ve microorganisms respectively.

关键词： Essential Oils β-Caryophyllene germacrene A Antibacterial Activity

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Chemical Compositions of the Leaf Essential Oils of <i>Aralia spinosa</i>from Three Habitats in Northern Alabama

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American Journal of Plant Sciences 2011年第3期2卷 507-510页

作者： Purva C. Davé Bernhard Vogler William N. Setzer 不详

Aralia spinosa leaves were collected from three different habitats in north Alabama. The leaf essential oils were collected by hydrodistillation and analyzed by gas chromatography / mass spectrometry (GC-MS). The most abundant components of A. spinosa essential oils were the sesquiterpenes germacrene D (28.0% - 37.3%), (E)-caryophyllene (8.2% - 15.7%), and α-humulene (1.9% - 4.9%);the monoterpene myrcene (up to 15.1%), and the fatty-acid-derivative (2E)-hexenal (trace to 28.9%). Fatty-acid derivatives and monoterpene hydrocarbons were more abundant in samples from suburban Huntsville than those from “natural” habitats (Monte Sano Mountain, Wheeler National Wildlife Refuge), while sesquiterpene hydrocarbons were more abundant in the natural/wild samples.

关键词： Aralia spinosa Araliaceae Leaf Essential Oil Chemical Composition germacrene D Myrcene (E)-Caryophyllene (2E)-Hexenal

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