Morphogenetic and diurnal variation of hypericin in some Hypericum species from Turkey during the course of ontogenesis

Changes in the contents of main secondary metabolites in two TurkishHypericumspecies during plant development

“…depilatum during plant development followed the same trend as that of rutin, hyperoside, isoquercetine and quercitrine. The highest level was reached at flowering and the content of both hypericin forms decreased during fruit ontogenesis as observed in our previous study on total hypericin content of the same species (Cirak et al, 2006). Similarly, the highest content of hypericin and pseudohypericin in H. perforatum (Couceiro et al, 2006;Bagdonaite et al, 2010), H. pruinatum (Cirak et al, 2006) and H. origanifolium (Cirak et al, 2007b) was determined during flower ontogenesis.…”

“…In other species of Hypericum, similarly, hypericin, pseudohypericin, hyperforin, quercitrine and quercetine were accumulated mainly in floral parts while leaves produced higher amounts of chlorogenic acid and hyperoside in H. origanifolium and H. perfoliatum (Cirak et al, 2007 b,c). H. maculatum (Radusiene et al, 2004), H. pruinatum (Cirak et al, 2006) and H. lydium (Cirak et al, 2006) were also reported to accumulate more hypericin in flowers than in leaves.…”

“…depilatum var. depilatum (Cirak et al, 2006). However, to the authors' knowledge, no study has been done on phenological variation of the chemicals including each hypericin form in those species.…”

The effects of salt and drought stress on phenolic accumulation in greenhouse-grown Hypericum pruinatum

“…and Bal., a perennial herbaceous plant which grows naturally in igneous slopes at high altitudes is one of the species of Turkish Hypericum. In previous studies, H. pruinatum were reported to have great pharmaceutical potential, with its well-documented contents of hypericin (Cirak et al, 2006), hyperforin (Smelcerovic et al, 2008), organic acids and flavonoids (Cirak et al, 2007). Because of the similarities in the (Gray et al, 2003;Zobayed et al, 2007) and Hypericum brasiliense (Abreu and Mazzafera, 2005).…”

Comparision of some models for estimation of reflectance of hypericum leaves under stress conditions

“…Today, several chemicals derived from plants are used worldwide as important drugs. Hypericum species have been used as traditional medicinal plants due to their wound-healing, bactericide, anti-inflammatory, diuretic and sedative properties for many centuries [1][2][3]. The major phytomedicinal compounds of Hypericum plants are thought to be phloroglucinol derivatives hyperforin and adhyperforin, the naphthodianthrones hypericin, pseudohypericin, the flavonoids hyperoside, rutin, quercitrin, quercetin and biapigenin, the phenylpropanes caffeic acid, chlorogenic acid, and essential oils which possess a wide array of biological properties [4][5][6].…”