Browsing by Author "Jakstas, Valdas"
Now showing items 1-10 of 10
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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, ... -
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 ... -
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 ... -
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 ... -
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 ... -
Phenological changes in the chemical content of wild and greenhouse-grown Hypericum pruinatum: flavonoids
Cirak, Cuneyt; Radusiene, Jolita; Ivanauskas, Liudas; Jakstas, Valdas; Camas, Necdet (Tubitak Scientific & Technical Research Council Turkey, 2014)The present study was conducted to determine the phenological changes in the content of main flavonoids, namely amentoflavone, hyperoside, isoquercitrin, quercitrin, quercetin, avicularin, rutin, (+)-catechin, and ... -
Population Variability of Main Secondary Metabolites in Hypericum lydium Boiss. (Hypericaceae)
Cirak, Cueneyt; Radusiene, Jolita; Ivanauskas, Liudas; Jakstas, Valdas; Camas, Necdet (Shaheed Beheshti Univ, Sch Pharmacy, 2015)In the present study, we investigated the variation in the content of naphthodianthrones hypericin and pseudohypericin, phloroglucinol derivatives hyperforin and adhyperforin, the phenolic acids as chlorogenic acid, ... -
Secondary metabolites in Hypericum species and their distribution in different plant parts
Odabas, Mehmet Serhat; Radusiene, Jolita; Ivanauskas, Liudas; Jakstas, Valdas; Camas, Necdet; Kayikci, Samim (Lithuanian Research Centre Agriculture & Forestry, 2016)The genus Hypericum (Hypericaceae) has attracted remarkable scientific interest as its members accumulate significant amounts of various bioactive compounds. In the current study, we investigated accumulation of several ... -
Secondary metabolites of Hypericum species from the Drosanthe and Olympia sections
Cirak, C.; Radusiene, Jolita; Jakstas, Valdas; Ivanauskas, Liudas; Yayla, Fatih; Seyis, Fatih; Camas, Necdet (Elsevier, 2016)Eight Hypericum species native to Southern Turkey from Drosanthe and Olympia sections were investigated for the presence of several bioactive compounds, namely, hypericin, pseudohypericin, hyperforin, adhyperforin, the ...
