Characterization of essential oil of Agastache species
1991
Charles, D.J. | Simon, J.E. | Widrlechner, M.P.
A collection of 19 accessions of Agastache foeniculum (anise hyssop), A. rugosa (catnip giant hyssop), A. nepetoides (Korean mint), and putative hybrids were analyzed for essential oil content and composition by gas chromatography (GC) and GC/mass spectroscopy. There was significant variation in oil content of the different lines of Agastache spp., ranging from 0.07 to 2.73 (percent volume/dry weight) for leaves and from 0.10 to 3.00 (percent volume/dry weight) for flowers. Variation in the essential oil composition was high among lines of A. foeniculum but low among lines of A. rugosa. Twenty-six compounds were identified in the essential oils, with methylchavicol being the major constituent (46.7-94.6%) in 14 lines of A. foeniculum, A. rugosa, and putative hybrids. In contrast, delta-cadinol was the major oil constituent (39.6%) in A. nepetoides. Additional oil constituents found in these species in concentrations above 1% include beta-bourbonene, bornyl acetate, gamma-cadinene, alpha-cadinol, delta-cadinene, alpha-camphene, beta-caryophyllene, damascenone, beta-ionone, isomenthone, alpha-limonene, linalool, methyleugenol, beta-myrcene, cis-ocimene, 7-octen-4-ol, pulegone, and spathulenol.
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