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Pseudohypericin and Hyperforin in Hypericum perforatum from Northern Turkey:Variation among Populations,Plant Parts and Phenological Stages

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Journal of Integrative Plant Biology 2008年第5期50卷 575-580页

作者： Cüneyt irak Jolita Radusiene Valdimaras Janulis liudas ivanauskas Faculty of Agriculture Department of Agronomy University of Ondokuz Mayis55139 KurupelitSamsunTurkey Institute of Botany VilniusLT-08406Lithuania Kaunas University of Medicine KaunasLT-44307Lithuania

Hypericum perforatum is a perennial medicinal plant known as ＂St. John＇s wort＂ in Western Europe and has been used in the treatment of several diseases for centuries. In the present study, morphologic, phenologic and population variability in pseudohypericin and hyperforin concentrations among H. perforatum populations from Northern Turkey was investigated for the first time. The aerial parts of H. perforatum plants representing a total of 30 individuals were collected at full flowering from 10 sites of Northern Turkey to search the regional variation in the secondary metabolite concentrations. For morphologic and phenologic sampling, plants from one site were gathered in five phenological stages： vegetative, floral budding, full flowering, fresh fruiting and mature fruiting. The plant materials were air-dried at room temperature and subsequently assayed for chemical concentrations by high performance liquid chromatography. Secondary metabolite concentrations ranged from traces to 2.94mg/g dry weight （DW） for pseudohypericin and traces -6.29mg/g DW for hyperforin. The differences in the secondary metabolite concentrations among populations of H. perforatum were found to be significant. The populations varied greatly in hyperforin concentrations, whereas they produced a similar amount of pseudohypericin. Concentrations of both secondary metabolites in all tissues increased with advancing of plant development and higher accumulation levels were reached at flowering. Among different tissues, full opened flowers were found to be superior to stems, leaves and the other reproductive parts with regard to pseudohypericin and hyperforin accumulations. The present findings might be useful to optimize the processing methodology of wild-harvested plant material and obtain increased concentrations of these secondary metabolites.

关键词： hyperforin Hypericum perforatum morphologic and phenologic variations population variability pseudohypericin.

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Variation of Bioactive Compounds in Hypericum perforatum Growing in Turkey During Its Phenological Cycle

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Journal of Integrative Plant Biology 2007年第5期49卷 615-620页

作者： Cüneyt Cirak Jolita Radusiěne Birsen (Saglam) Karabük Valdimaras Janulis liudas ivanauskas Faculty of Agriculture Department of Agronomy University of Ondokuz Mayis Samsun 55139 Turkey Institute of Botany Zaliuju ezeru Vilnius LT-08406 Lithuania Kaunas University of Medicine Kaunas LT-44307 Lithuania

The present study was conducted to determine phenologic and morphogeneUc variation of hyperlcln, chlorogenlc acid and flavonoids, as rutin, hyperoside, apigenin-7-O-glucoside, quercitrin, quercetin content of Hypericum perforatum L. growing in Turkey. Wild growing plants were harvested at vegetative, floral budding, full flowering, fresh frulUng and mature fruiting stages and dissected into stem, leaf and reproductive tissues and assayed for bioacUve compounds by the High performance liquid chromatography （HPLC） method. Hypericin concentration ranged between 0 and 2.73 mg/g DW, chlorogenic acid 0.00-3.64 mg/g DW, rutin 0.00-3.36 mg/g DW, hyperoside 0.04- 22.42 mg/g DW, quercitrin 0.03-3.46 mg/g DW and quercetin 0.04-1.02 mg/g DW depending on ontogenetic and morphogenetic sampling. Leaves were found to be superior to stems and reproductive parts with regard to phenolic accumulation for all compounds tested while flowers accumulated the highest levels of hypericln. Quercltrln, quercetln and hypericin content in all tissues increased with advancing of developmental stages and reached their highest level during flower ontogenesis. Similarly, chlorogenic acid, hyperoside and apigenin-7-O-glucoside content in different plant parts increased during plant development, however, the highest level was observed at different stages of plant phenology for each tissue. Chlorogenic acid was not detected in stems, leaves and reproductive parts in several stages of plant phenology and its variation during plant growth showed inconsistent manner. In contrast to the other compounds examined, rutin content of stems and leaves decreased with advanc- ing of plant development and the highest level for both tissues was observed at the vegetative stage. However, content of the same compound in reproductive parts was the highest at mature fruiting. The present findings might be useful to obtain increased concentration of these natural compounds.

关键词： chiorogenic acid flavonoids hypericin Hypericum perforatum morphogenetic variation phenologic variation.

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Phytochemical Analysis and Antioxidant Activity of Crocus speciosus Leaves

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Phyton-International Journal of Experimental Botany 2022年第1期91卷 207-221页

作者： Olha Mykhailenko Ivan Bezruk Victoriia Volochai Volodymyr Mishchenko liudas ivanauskas Victoriya Georgiyants Department of Pharmaceutical Chemistry National University of PharmacyKharkiv61168Ukraine Department of Pharmacognosy National University of PharmacyKharkiv61168Ukraine Department of Quality Standardisation and Certification of DrugsNational University of PharmacyKharkiv61001Ukraine Department of Analytical and Toxicological Chemistry Lithuanian University of Health SciencesKaunas44307Lithuania

The numerous studies indicate leaves of plants are a rich source of bioactive compounds that can be a valuable source of compounds used in the pharmaceutical and cosmetic *** of this study was to investigate the chemical composition and the antioxidant property of Crocus speciosus *** phytochemical screening of *** leaves revealed the presence of some following compound categories such as phenolic compounds,aminoacids,saponins,proteins,tannins,triterpenoids,glycosides,*** total flavonoids and phenolic compounds content were determined spectrophotometrically and by HPLC-DAD and *** activity was determined by ABTS radical-cation scavenging method,*** total amount of flavonoids in *** leaves was 1.07±0.02 mg RE/g(p<0.05),the total amount of phenolic compounds was 0.41±0.01 mg GAE/g(p<0.05).By HPLC-DAD-MS analysis the presence of the mangiferin,chlorogenic acid,isoorientin,kaempferol,hyperoside,and isoquercitin was established for the first time in Crocus *** antiradical activity of *** leaves extracts was 150.08±4.5μmol/g(p<0.05)and its was mainly attributed to phenolic compounds *** high amounts of flavonoids and antiradical activity in *** leaves suggests promising phytochemical and pharmacological study of this Crocus species.

关键词： Crocus speciosus flavonoids leaves antiradical activity

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