Babacan, Ebru Yüce; Demirpolat, Azize; Çakılcıoğlu, Uğur; Bagcı, Eyüp

The genus Opopanax W. Koch (Apiaceae) is represented by four species in Turkey. The composition of the essential oil of Opopanax genus members (Apiaceae) growing in Turkey was investigated in this study. GC-MS was used to analyze the composition of Opopanax essential oil samples that were taken from their natural environments. The Clevenger apparatus was used to hydrodistill the plant’s aerial parts, and the yields were determined to be between 0.2% v/w (for O. siifolius) and 0.4% (for O. hispidus, O. chironium, and O. persicus). The results and the chemical data provided some information and clues on the chemotaxonomy of the genus Opopanax. In this study, γ-elemene, butanoic acid octyl ester, and cylopropane were the main compounds identified in the essential oils of O. chironium, O. hispidus, and O. persicus. In particular, hexynyl n-valerate was most abundant in the essential oil of O. chironium, cyclopropane in that of O. hispidus, γ-elemene in that of O. persicus, and n-hexadecanoic acid/palmitic acid in that of O. siifolius. In a chemotaxonomic approach, the essential oil analysis of the Opopanax species revealed that these species conformed in a cluster analysis with their morphological classification. The constituents of the essential oils of all examined in the genus Opopanax were determined in this study, which is the most thorough one to date. This study provides new information about the composition of the essential oils of the investigated species.

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Yuce-Babacan, Ebru; Demirpolat, Azize

In our study, chemotaxonomic comparisons and essential oil composition of Hypericum ekeriNtice&Aytac (Hypericaceae) endemic to Turkey was studied for the first time. The composition of the essential oils of Hypericum ekerii was investigated and 45compounds were determined in total. GC and GC-MS analysis result showed a-pinene 18.73%, limonene 7.28%, caryophyllene oxide 6.71% and b-caryophyllene 6.47% as the majorcomponents. Based on the major chemical components, clusterinvestigated was applied for all the Hypericum species on Drosanthesection studied. With H. ekerii and all Drosanthesection species were grouped based on the presence of a specific compound and a dendrogram was created, and this section grouped the species into clusters. The chemical distribution of essential oil compounds in the genus pattern were discussed in means of natural products, major components and chemotaxonomy.

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