Morphogenetic and diurnal variation of total phenols in some Hypericum species from Turkey during their phenological cycles

Autor:	Cüneyt Çirak, Mahmut Bilgener, Ali Kemal Ayan, Pgizjam Yanar
Rok vydání:	1970
Předmět:	Hypericum species Budding biology Phenology Ontogeny Diurnal temperature variation Plant Science biology.organism_classification chemistry.chemical_compound chemistry Genus Botany Phenols Hypericum
Zdroj:	Bangladesh Journal of Botany. 36:39-46
ISSN:	2079-9926 0253-5416
DOI:	10.3329/bjb.v36i1.1547
Popis:	The genus Hypericum has attracted scientific interest worldwide in recent years, since it is a source of a variety of biologically active compounds including the phenolics. The present study was to determine ontogenetic, morphogenetic and diurnal variation of the total phenol contents in some Hypericum species growing in Turkey namely, H. nummularioides, H. hyssopifolium, H. pruinatum and H. scabrum. Plants were separated into stem, leaf and reproductive tissues, which were dried separately, and subsequently assayed for total phenol contents. Among different tissues, leaves had higher phenol contents and the highest content reached at noon in all species tested. But, ontogenetic change in the total phenol contents of whole plants varied among the species. It reached the highest level at floral budding in H. hyssopifolium and H. scabrum, at full flowering in H. pruinatum and at fresh fruiting in H. nummularioides. Â Key words: Hypericum sp., Diurnal variation, Total phenols, Phenological cycles doi:10.3329/bjb.v36i1.1547 Bangladesh J. Bot. 36(1): 39-46, 2007 (June)
Databáze:	OpenAIRE
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