Hypericum perforatum L. (St. Johns’ wort) is the most commercially important species of the genusHypericum and contains a wide range of components including naphthodianthrones, phloroglucinols,tannins, xanthones, phenolic acids and essential oil. In the present study, for the first time the varia-tion of the essential oil compositions among 10 wild populations of H. perforatum growing in Iran wasassessed. According to the GC-FID and GC–MS analyses, a total of forty-six components were identifiedin 10 H. perforatum populations with relatively high variation in their composition. Among chemicals,2,6-dimethyl-heptane (6.25–36.07%), ˛-pinene (5.56–26.03%), ı-cadinene (0.0–22.58%) and -cadinene(0.0–16.9%) were found as the most abundant compounds in their essential oils. The higher amounts ofthis components were identified in the oil of Azadshahr, Kharw, Nor and Mashhad populations, respec-tively. Cluster analysis grouped the studied populations into four different chemotypes: chemotype I(ı-cadinene/˛-humulene), chemotype II (˛-pinene), chemotype III (-cadinene) and chemotype IV (2,6-dimethyl-heptane/˛-pinene). In fact, local abiotic factors such as moisture, temperature, topography,edaphic and/or biotic selective factors (associated fauna and flora) act on loci of the terpene-biosynthesispathways and contribute to the emergence of different chemical oil profiles. Intraspecific variation in thechemical profile of the Iranian populations provided possibility of selection of those with specific aromasor chemical profiles accompanied with biological document, being of interest at industrial level. Obtainedresults provided new insight for Iranian H. perforatum germplasm to be used in breeding programs anddevelopment of effective conservation strategies.
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|Titolo:||Chemical Characterization of the Essential Oil Compositions from Iranian Populations of Hypericum perforatum L.|
|Data di pubblicazione:||2015|
|Appare nelle tipologie:||Articolo|