A method for detecting the biosystematic significance of the essential oil composition: The case of five Hellenic Hypericum L. species |
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| Affiliation: | 1. NAGREF, Institute of Mediterranean Forest Ecosystem Research, Laboratory of Entomology, Terma Alkmanos, 115 28 Ilisia, Athens, Greece;2. University of Athens, Pharmacognosy, Panepistemiopolis Zografou, Athens 157 71, Greece;1. College of Traditional Chinese Medicine, Jilin Agricultural University, Changchun 130118, China;2. Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100193, China;3. School of Pharmacy, Jiangsu University, Zhenjiang 212013, Jiangsu, China;1. Institute of Agricultural Sciences and Environments, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China;2. Department of Soil & Crop Sciences, Texas A&M University, College Station, 77843, USA;3. Department of Horticultural Sciences, Texas A&M University, College Station, 77843, USA;4. College of Environmental Science and Engineering, Yangzhou University, Yangzhou 250127, Jiangsu Province, China;1. Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-Nihonmatsu, Sakyo-ku, Kyoto 606-8501, Japan;2. Kochi Gakuen College, Asahi-Tenjin, Kochi 292-26, Japan |
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| Abstract: | We examined the importance of the constitutive terpenoids of five species of Hypericum native to the Greek mainland, Crete Island and the west Aegean. The species studied are Hypericum empetrifolium Willd. (sect. Coridium Spach), Hypericum rumeliacum Boiss. subsp. apollinis Robson & Strid, Hypericum perfoliatum L. (sect. Drosocarpium Spach), Hypericum triquetrifolium Turra and Hypericum perforatum L. (sect. Hypericum, subsect. Hypericum [Robson, N.K.B., 2001. Studies in the genus Hypericum L. (Guttiferae). 4 (1). Sections 7. Roscyna to 9. Hypericum sensu lato (part 1). Bull. Brit. Mus. (Nat. Hist.) Bot. 31, 37–88]). Canonical discriminant analysis (CDA) on 98 of the most abundant terpenoids was found to achieve a separation of species. The performed phylogenetic reconstruction supports the existing divisions of Hypericum in taxonomic sections. Other multivariate techniques were also investigated such as principal coordinate analysis and principal component analysis, but these were found inferior to CDA. These analyses transformed the data in such a way that they did not sufficiently account for the entire terpenoid variation, nor did they delineate species in accepted taxonomic sections. |
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