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    Antioxidant, Anticholinesterase and Antibacterial Activities of Jurinea consanguinea DC.
    (Acg Publications, 2011) Ozturk, Hulya; Kolak, Ufuk; Meric, Ciler
    The aim of this study was to investigate in vitro antioxidant, anticholinesterase and antibacterial activities of the petroleum ether, chloroform and methanol extracts obtained from the aerial parts of Jurinea consanguinea DC. (Asteraceae). Total phenolic and flavonoid contents of these crude extracts were determined as pyrocatechol and quercetin equivalents, respectively. The methanol extract which possessed almost the same effect with the chloroform extract in beta-carotene-linoleic acid system exhibited higher free radical scavenging activity than a standard compound, BHT, at 100 and 200 mu g/mL concentrations. The petroleum ether extract showed the highest acetylcholinesterase inhibitory activity among the tested extracts. The methanol extract exhibited higher butyrylcholinesterase inhibitory activity than galantamine at all concentrations (94% inhibition at 200 mu g/mL). The antibacterial activity of the extracts was determined by the disc diffusion method. The chloroform extract showed moderate activity against B. subtilis, P. aeruginosa and S. aureus.
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    CALCIUM OXALATE CRYSTALS IN SOME SPECIES OF THE TRIBE INULEAE (ASTERACEAE)
    (Polska Akad Nauk, 2009) Meric, Ciler
    In this study, calcium oxalate (CaOx) crystals were investigated and their morphology and distribution determined by light microscopy in tissues and organs of Inula graveolens (L.) Desf.. Pulicaria dysenterica (L.) Bernh., Filago eriocephala Guss., Logfia arvensis (L.) Holup and Logfia gallica (L.) Coss. & Germ. which belong to tribe Inuleae (Asteraceae). CaOx crystals were identified in cleared organs and tissues by a histochemical technique using silver nitrate and rubeanic acid. Druses were observed in stein pith cells, leaf histophyll cells and style cells of I. graveolens. In anther tissues, crystals were determined as styloids, and in the ovary they were identified as prismatics. No crystals were found in petal and filament cells of I. graveolens. Druse crystals were present in the filament and style cells of P. dysenterica: styloids were found in the endothecial tissues of anthers, and prismatic crystals in the ovary cells of this species. No crystals were found in petal, stern and leaf tissues of P. dysenterica. F. eriocephala and L. arvensis. and L. gallica had small prismatic crystals only in their ovaries. No crystals were observed in the other tissues of these species. This study represents additional data oil the presence of CaOx crystals in Asteraceae.
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    A COMPARATIVE STUDY ON THE SIGNIFICANCE OF LEAD, NICKEL AND CADMIUM ON ROOT GROWTH, THE KINETICS OF METAL ION TRANSPORT AND pH CHANGES IN ONION (ALLIUM CEPA) ROOT
    (Parlar Scientific Publications (P S P), 2016) Akbas, Halide; Dane, Feruzan; Meric, Ciler
    In this study, the effect of different concentrations of lead (0.25, 0.50, 1.00 and 2.00 mM) uptake by roots, on root growth of Allium cepa, and the transport of lead ion (Pb2+), iron ion (Fe2+), manganese ion (Mn2+) and hydrogen ion (H+) were investigated spectrophotometrically. The uptake of Pb2+, Fe2+ and Mn2+ by Allium cepa were monitored by a Unicam model 929 flame atomic absorption spectrophotometer (AAS) and pH values were measured by a Jenway 3040 Ion Analyzer with a combination glass electrode. The mineral content of the solution was measured instead of the mineral content of the root material. Lead ions had inhibitory effect on the root growth in all concentrations during the entire treatment. The EC50 was found at 0.50 mM Pb2+. A large amount of Pb2+ was translocated into A. cepa roots. The kinetics of metal ion transport was described by a pseudo-first order reaction at 1.00 and 2.00 mM metal ion concentrations. Pb2+, Fe2+ and H+ ions transfer into plant from solution but Mn2+ ion transfer to the solution from the plant. The amount of H+ in the solution is increased at all Pb+2 concentrations except 0.25 mM Pb+2 concentration. The results of this study are compared with previous studies with nickel and cadmium treatment.
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    Effect of nickel on root growth and the kinetics of metal ions transport in onion (Allium cepa) root
    (Natl Inst Science Communication-Niscair, 2009) Akbas, Halide; Dane, Feruzan; Meric, Ciler
    The effect of different concentrations of nickel nitrate (0.25, 0.50, 1.00 and 2.00 mM) uptake by the roots, on root growth of onion (Allium cepa) and the transport of Ni2+, Fe2+, Mn2+, Zn2+, K+, Na+ and H+ ions were investigated spectrophotometrically. The uptake of Ni2+, Fe2+, Mn2+ and Zn2+ was monitored by flame atomic absorption spectrometry with a 24-h period for 7 days and the amounts of K+ and Na+ were determined in solutions by flame photometer, The mineral content of the solution, instead of the root material was measured. Ni2+ ions showed inhibitory effect oil the root growth at all concentrations during the entire treatment. The EC50 (effective concentration that reduced root growth by 50%) was found at 0.25 mM Ni2+. No significant change in inhibitory effect was observed after at 0.50 mM Ni2+ concentrations. A large amount of Ni2+ was translocated into the roots. The kinetics of metal ion transport followed a pseudo-first order reaction in all metal ion concentrations. Ni2+, Zn2+ Fe2+ Mn2+ and H+ ions transferred together into plant, but Na+ and K+ ions transferred to the solution from the plant. The amount of H+ in the solution decreased at all Ni2+ concentrations.
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    Morphological and anatomical contributions to the taxonomical identification of two Ornithogalum taxa (O. nutans and O. boucheanum) from Flora of Turkey
    (Springer, 2011) Meric, Ciler; Aksoy, Ozlem; Dane, Feruzan
    In this study, morphological and anatomical features of Ornithogalum nutans and O. boucheanum, two relative and morphologically similar species growing in European Turkey, were investigated. These species showed some important anatomical differences with regard to leaf anatomy while they have identical features in stem. The stem anatomy of these two species displays the common properties of monocotyledons. The mesophyll is unifacial and contains monotypic chlorenchyma cells in the leaf of O. nutans. It has no lacunae. The mesophyll in O. boucheanum is equifacial and it has lacunae. This anatomical distinction may be useful for the identification of these similar-looking species.
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    Morphological, anatomical and karyological investigations of the Turkish endemic species Lathyrus woronowii Bornm. (Fabaceae)
    (Univ Zagreb, Fac Science, Div Biology, 2017) Gunes, Fatma; Meric, Ciler
    Lathyrus woronowii Bornm., an endemic species of Turkey, is threatened with extinction due to dam construction. It exists only in the Coruh valley, Artvin. This annual species is in the critically endangered (CR) category according to the International Union of Conservation of Nature (IUCN) criteria. Its morphology, anatomy and karyology are studied here for the first time. A detailed description is given and the general appearance of the species has been drawn; cross sections from the stem and leaf have been taken and examined; and the diploid chromosome number (2n = 14) has been reported and illustrated for the first time.