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Variations in total phenolics during ontogenetic, morphogenetic, and diurnal cycles inHypericum species from Turkey

한국식물학회지 2006년 49권 6호 p.432 ~ 439
Ayan Ali Kemal, Cirak Cuneyt, Yanar Oguzhan,
소속 상세정보
 ( Ayan Ali Kemal ) - University of Ondokuz Mayis High School of Profession of Bafra
 ( Cirak Cuneyt ) - University of Ondokuz Mayis Faculty of Agriculture Department of Agronomy
 ( Yanar Oguzhan ) - University of Ondokuz Mayls Faculty of Science and Art Department of Biology

Abstract


Several species ofHypericum are used in traditional Turkish folk medicine. Their most medicinally important secondary metabolites are the hypericins, hyperforins, and phenolics. Here, we determined the ontogenetic, morphogenetic, and diurnal variations in total phenolics contents fromH. aviculariifolium subsp.depilatum var.depilatum (endemic),H. perforation, andH. pruinatum. Plants of wild-growingH. aviculariifolium subsp.depilatum var.depilatum andH. perforatum, and greenhouse-grownH. pruinatum were harvested four times per day during their vegetative, floral-budding, full-flowering, fresh-fruiting, and mature-fruiting stages. They were then dissected into stem, leaf, and reproductive tissues to be dried separately and assayed. The highest level of phenolics inH. aviculariifolium subsp.depilatum var.depilatum andH. pruinatum was found in the leaves, whereas the floral buds produced the greatest amount inH. perforatum. Variations in contents from whole plants fluctuated diurnally, differing among species over the course of ontogenesis, reaching the highest level at floral-budding and tending to increase at mid-day inH. aviculariifolium subsp.depilatum var.depilatum. ForH. perforatum andH. pruinatum, contents also were the highest during floral development, although no diurnal fluctuations were observed in those species.

키워드

diurnal variation; Hypericum spp.; ontogenesis; phenolics; plant defense

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