Yazar "Cirak, Cuneyt" için listeleme
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Altitudinal changes in secondary metabolite contents of Hypericum androsaemum and Hypericum polyphyllum
Cirak, Cuneyt; Radusiene, Jolita; Jakstas, Valdas; Ivanauskas, Liudas; Seyis, Fatih; Yayla, Fatih (Pergamon-Elsevier Science Ltd, 2017)The genus Hypericum (Hypericaceae) has attracted scientific interest as its members have yielded many bioactive compounds. In the present study we investigated the content of hypericin, pseudohypericin, hyperforin, ... -
Altitudinal changes in the content of bioactive substances in Hypericum orientale and Hypericum pallens
Camas, Necdet; Radusiene, Jolita; Ivanauskas, Liudas; Jakstas, Valdas; Cirak, Cuneyt (Springer Heidelberg, 2014)Altitudinal changes in the content of hypericin, pseudohypericin, hyperforin, adhyperforin, chlorogenic acid, neochlorogenic acid, caffeic acid, 2,4-Dihydroxybenzoic acid, amentoflavone, hyperoside, isoquercitrin, quercitrin, ... -
Aromatic profiling of wild and rare species growing in Turkey: Hypericum aviculariifolium Jaub. and Spach subsp. depilatum (Freyn and Bornm.) Robson var. depilatum and Hypericum pruinatum Boiss. and Bal.
Cirak, Cuneyt; Bertoli, Alessandra (Taylor & Francis Ltd, 2013)The volatile constituents of the rare species of Hypericum, namely Hypericum pruinatum (as one population) and Hypericum aviculariifolium subp. depilatum var. depilatum (endemic, as two populations namely Gumu' and Yenikoy') ... -
Changes in phenolic content of wild and greenhouse-grown Hypericum triquetrifolium during plant development
Cirak, Cuneyt; Radusiene, Jolita; Karpaviciene, Birute; Camas, Necdet; Odabas, Mehmet Serhat (Tubitak Scientific & Technical Research Council Turkey, 2013)Hypericum triquetrifolium is a promising medicinal plant from eastern Europe and the Mediterranean area. The present study was conducted to determine ontogenetic and morphogenetic variation of chlorogenic acid, rutin, ... -
Changes in the content of bioactive substances among Hypericum montbretii populations from Turkey
Cirak, Cuneyt; Radusiene, Jolita; Ivanauskas, Liudas; Jakstas, Valdas; Camas, Necdet (Soc Brasileira Farmacognosia, 2014)In the present study, we investigated the variation in the content of seventeen secondary metabolites among Hypericum montbretii Spach., Hypericacea, populations from five different growing zones in Turkey for the first ... -
Changes in the contents of main secondary metabolites in two Turkish Hypericum species during plant development
Cirak, Cuneyt; Radusiene, Jolita; Camas, Necdet; Caliskan, Omer; Odabas, Mehmet Serhat (Informa Healthcare, 2013)Context: The genus Hypericum (Guttiferae) has received considerable scientific interest as a source of biologically active compounds. Objective: The study determined the morphogenetic and ontogenetic variation in the main ... -
Chemical composition of Hypericum species from the Taeniocarpium and Drosanthe sections
Camas, Necdet; Radusiene, Jolita; Ivanauskas, Liudas; Jakstas, Valdas; Kayikci, Samim; Cirak, Cuneyt (Springer Wien, 2014)The presence of several phytochemicals, namely naphthodianthrones hypericin and pseudohypericin, phloroglucinol derivatives hyperforin and adhyperforin, the phenolic acids as chlorogenic acid, neochlorogenic acid, caffeic ... -
Differential Phenolic Accumulation in Two Hypericum Species in Response to Inoculation with Diploceras hypericinum and Pseudomonas putida
Cirak, Cuneyt; Radusiene, Jolita; Aksoy, Hasan Murat; Mackinaite, Rimute; Stanius, Zydrunas; Camas, Necdet; Odabas, Mehmet Serhat (Czech Academy Agricultural Sciences, 2014)The genus Hypericum L. (St. John's-wort, Hypericaceae) has received scientific interest in recent years, because it is a source of a variety of bioactive compounds including the phenolics. We determine whether the typical ... -
Direct and indirect regeneration of plants from internodal and leaf explants of Hypericum bupleuroides gris.
Cirak, Cuneyt; Ayan, Ali Kemal; Kevseroglu, Kudret (Botanical Society of Korea, 2007)Species of the genus Hypericum are of considerable interest worldwide because of their medicinal properties. in-vitro culture is a useful tool for both multiplication of the genus and studying its economically important ... -
Effect of nitrogen on herb production, secondary metabolites and antioxidant activities of Hypericum pruinatum under nitrogen application
Radusiene, Jolita; Marksa, Mindaugas; Ivanauskas, Liudas; Jakstas, Valdas; Caliskan, Omer; Kurt, Dursun; Cirak, Cuneyt (Elsevier, 2019)The optimization of growing conditions using germplasm potentials is an effective way to manage the production and quality of medicinal plant raw materials. The present study aimed to evaluate the effect of mineral nitrogen ... -
The effects of salt and drought stress on phenolic accumulation in greenhouse-grown Hypericum pruinatum
Caliskan, Omer; Radusiene, Jolita; Temizel, Kadir Ersin; Staunis, Zydrunas; Cirak, Cuneyt; Kurt, Dursun; Odabas, Mehmet Serhat (Pagepress Publ, 2017)Hypericum pruinatum is a medicinal herb containing several bioactive compounds with important pharmacological activity. In this study, we investigated the effects of the salt 0.03 -control, 1, 2.5, 4 and 8 dS m(-1) of ... -
Factors affecting the variation of bioactive compounds in Hypericum species
Cirak, Cuneyt; Radusiene, Jolita (Akademiai Kiado Zrt, 2019)The genus Hypericum (Hypericaceae) consists of 484 species from 36 sections with worldwide distribution in different areas. Turkey is considered as hot spot for diversity of Hypericum genus. Despite numerous publications, ... -
Foliar zinc application on yield and quality characters of soybean
Aytac, Selim; Cirak, Cuneyt; Ozcelik, Huseyin (Asian Journal of Chemistry, 2007)Present study was conducted to determine the effects of foliar application at different doses of Zn (0, 1500, 3000 and 4500 g ha(-1)) on yield and some quality characters of soybean in the silty clay soils with high nutrient ... -
Hypericin and pseudohypericin contents in some Hypericum species growing in Turkey
Ayan, Ali Kemal; Cirak, Cuneyt (Taylor & Francis Ltd, 2008)Hypericin and pseudohypericin content in stems, leaves, and flowers of some Hypericum species growing in Turkey, namely, H. heterophyllum Vent, H. hyssopifolium L., H. linarioides Bosse, H. monbretii Spach, H. orientale ... -
Hypericin in Hypericum lydium Boiss. growing in Turkey
Cirak, Cuneyt (Pergamon-Elsevier Science Ltd, 2006)… -
Hypericum origanifolium Willd.: the essential oil composition of a new valuable species
Bertoli, Alessandra; Cirak, Cuneyt; Seyis, Fatih (Elsevier, 2015)Turkish Hypericum origanifolium Willd has been recently considered for its hypericin and phenolic content as a potential substitute of the well-established EU market position Hypericum perforatum. However, a complete ... -
Modeling of the individual leaf area and dry weight of oregano (Origanum onites L.) leaf using leaf length and width, and SPAD value
Caliskan, Omer; Odabas, Mehmet Serhat; Cirak, Cuneyt; Odabas, Ferhat (Academic Journals, 2010)The study was aimed to modeling of the individual leaf area and dry weight of oregano ( origanum onites L.) using leaf length, leaf width and SPAD value. Non-destructive approach of modeling can be very useful for plant ... -
The modeling of the relation among the temperature and light intensity of growth in Ocimum basilicum L.
Caliskan, Omer; Odabas, Mehmet Serhat; Cirak, Cuneyt (Academic Journals, 2009)Changes in plant growth caused by the effects of environmental conditions such as temperature and light intensity were intended to be described by plant growth models. The study was aimed to define the relationships between ... -
Morphogenetic and diurnal variation of total phenols in some Hypericum species from Turkey during their phenological cycles
Ayan, Au Kemal; Yanar, Oguzhan; Cirak, Cuneyt; Bilgener, Mahmut (Bangladesh Botanical Soc, 2007)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 ontogenctic, ... -
Morphogenetic and phenological changes in phenolic content of Hypericum leptophyllum, an endemic Turkish species
Seyis, Fatih; Radusiene, Jolita; Ivanauskas, Liudas; Jakstas, Valdas; Cirak, Cuneyt (Taylor & Francis Ltd, 2016)The present study was conducted to determine the morphogenetic and phenologic variations in the content of the main bioactive compounds in Hypericum leptophyllum Hochst., an endemic species from Turkish flora. Wild plants ...
