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of the Essential Oils of Origanum vulgare ssp. vulgare L. and O. vulgare ssp. hirtum (Link) letswaart* 2003, 57, 95-98 K. Veres 1. / E. Varga 1/,~. Dobos ~ / Zs. Hajd0 ~ / I. Mdth6 ~' 3 / Ft. N6meth 2 / K. SummaryThe essential oils of Origanum vulgare L. ssp. hirtum (Link) letswaart and Origanum vulgare L ssp. vulgare (Fam. Lamiaceae), cultivated in Hungary, have been studied byGC and GC-MS and the qualitative and quantitative chemical composition of the essential oils in the f,,vo species have been compared. O. vulgare ssp. hirtum oil was found to contain carvacrol (76.4%), ?terpinene (6.6%), thymol (0.23%), and p-cymene (4.7%) as the main constituents whereas the major compounds in O. vulgare ssp. vulgare oil were p-cymene (22.3%), caryophyllene oxide (10.2%), sabinene (Z9%), 7-terpinene (5.1%), thymol (0.34%), and spathulenol (4.8%). The stability of content and composition of the oils during the flowering period (economically beneficial period) were observed. The effect of long-term storage on the composition of the oil was also investigated for both the crude and distilled oil of Origanum vulgate ssp. vulgate.

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Ground ivy (Glechoma hederacea L.) is one of the prosperous plants for the food-industry as natural antioxidant. This fact led us to examine the chemical diversity of six ground ivy populations situated in different natural habitats and to analyse the effect of the harvesting time. Total phenolic content, chlorogenic acid, and rutin content, as well as the antioxidant capacity showed signifi cant differences due to the harvest time. The highest total phenol content (115 mg g-1 GAE) and the strongest antioxidant activity (53.3 mg g-1 AAE) were measured in the population originated from Budapest (GLE 6), harvested in July. The highest chlorogenic acid (357 mg/100 g) and rutin (950 mg/100 g) contents were detected in the July harvested samples from the Soroksár Botanical Garden population (GLE 1). According to our results, the collection time has signifi cant effect on the total phenolic content-fi rst of all on the chlorogenic acid and rutin accumulation levels of ground ivy, while the infl uence of the habitat seems to be less important.