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Öğe Chemical composition of Hypericum species from the Taeniocarpium and Drosanthe sections(Springer Wien, 2014) Camas, Necdet; Radusiene, Jolita; Ivanauskas, Liudas; Jakstas, Valdas; Kayikci, Samim; Cirak, CuneytThe presence of several phytochemicals, namely naphthodianthrones hypericin and pseudohypericin, phloroglucinol derivatives hyperforin and adhyperforin, the phenolic acids as chlorogenic acid, neochlorogenic acid, caffeic acid and 2,4-dihydroxybenzoic acid, the flavonols, hyperoside, isoquercitrin, quercitrin, quercetin, avicularin, rutin, and flavanols (+)-catechin and (-)-epicatechin, as well as biflavonoid amentoflavone was investigated in seven Turkish species of Hypericum from Taeniocarpium and Drosanthe sections. Plants were harvested at flowering, dried at room temperature, dissected into different tissues and assayed for chemical contents by HPLC. All chemicals were detected at various levels depending on species and plant parts. Despite the observed quantitative variation in the chemical content of plant material, it was found that phytochemical profiles of the species from the same section were very similar. The present data could be helpful in selecting the future targets for phytochemical and biological studies as well as enriching our current chemical knowledge about Hypericum species. Such kind of data could also be useful for elucidation of the chemotaxonomical relationships among the sections of Hypericum genus.Öğe Gagea antakiensis, a new species from Southern Anatolia, Turkey and the new finding of Gagea lojaconoi (Liliaceae)(Magnolia Press, 2014) Kayikci, Samim; Ocak, Atila; Teksen, Mehtap; Erkul, Seher KaramanGagea antakiensis (Liliaceae) is described and illustrated as a new species from Hatay province in South Anatolia, Turkey. The new species belongs to the section Didymobulbos, based on morphological features, and it is close to G. lojaconoi. The samples belonging to G. chrysantha species group in the Flora of Turkey were confirmed as G. lojaconoi. A taxonomic description, an illustration of the new species, geographical distribution, habitat and ecology, conservation status of the new species and its affinity to G. lojaconoi and G. chrysantha species group are given in this study. In addition, the anatomical features of G. antakiensis and G. lojaconoi are given.Öğe Noccaea ali-atahanii (Brassicaceae): a new species from southern Anatolia(Tubitak Scientific & Technological Research Council Turkey, 2018) Guzel, Yelda; Ozudogru, Baris; Kayikci, Samim; Ozgisi, KurtulusNoccaea ali-atahanii, a new Brassicaceae species from southern Anatolia, is described herein. It is mostly similar to N. aghrica, but can be readily distinguished by the presence of apical placentation and orbiculate fruit with wings extending almost evenly from the base to the apex. Its phylogenetic relationships within the genus are provided based on the nuclear-encoded ribosomal internal transcribed spacer region. Carpological and ecological features of N. ali-atahanii and related species are also discussed.Öğe Rediscovery and reinstatement of Heracleum amanum (Apiaceae) based on morphological and carpological data(Magnolia Press, 2017) Guzel, Yelda; Kayikci, SamimHeracleum amanum was only known so far from the material collected in the Amanos Mountains, near Belen (southern Turkey) in 1862 by C.G.T. Kotschy, which was referred to in the protologue. This taxon was considered a mere variant of H. crenatifolium in Flora of Turkey, and apparently it had never been collected again. In the present contribution, the rediscovery of H. amanum is reported about 150 years after the first publication of the name, and recent gatherings are compared to samples of H. crenatifolium on the basis of carpological and morphological data. As a result of the investigations carried out, H. amanum and H. crenatifolium are suggested here to be treated as separate species, both endemic to Turkey. Distribution and habitat data, as well as their conservation status, are assessed for each one.Öğe Scorzonera pacis (Asteraceae), a new species from Hatay, Turkey(Finnish Zoological Botanical Publishing Board, 2013) Guzel, Yelda; Kayikci, Samim; Yildiz, SerhatA new species, Scorzonera pacis Ouzel, Kayikci & S. Yildiz (Asteraceae) from Hatay Province, South Anatolia is described. It is a very distinct species with its saw-toothed, winged achenes. SEM micrographs of the achenes, notes on the habitat and distribution, and a comparison with its morphologically closest species are provided.Öğe Secondary metabolites in Hypericum species and their distribution in different plant parts(Lithuanian Research Centre Agriculture & Forestry, 2016) Odabas, Mehmet Serhat; Radusiene, Jolita; Ivanauskas, Liudas; Jakstas, Valdas; Camas, Necdet; Kayikci, SamimThe 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 bioactive compounds in various parts of Hypericum hircinum L. subsp. majus (Ainton) N. Robson, H. pallens Banks et Sol., H. russeggeri (Fenzl) R. Keller and H. lanuginosum Lam. The plant materials were harvested at flowering, dissected into different tissues and subsequently subjected to high performance liquid chromatography (HPLC) analyses. Accumulation level of the investigated compounds varied greatly depending on species and plant parts. Among different plant tissues, flowers were found to be superior to leaves with respect to accumulation of the chemicals tested except for neochlorogenic, caffeic and 2,4-dihydroxybenzoic acids which were accumulated mainly in leaves. H. hircinum did not produce quercitrin or avicularin, H. lanuginosum did not accumulate hyperforins and caffeic acid, rutin was detected only in H. pallens. For the first time, chemical profiles of these Turkish species of Hypericum were reported and the results are discussed from a phytochemical point of view. The present data could be helpful in selecting the future targets for phytochemical and biological studies on Hypericum genus as well as enriching our current knowledge about Hypericum chemistry.
