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    In vitro propagation of Diyarbakir watermelons and comparison of direct-seeded and transplanted watermelon
    (Tubitak Scientific & Technological Research Council Turkey, 2011) Okumus, Veysi; Pirinc, Vedat; Onay, Ahmet; Basaran, Davut
    A rapid protocol using shoot tip explants for micropropagation of Diyarbakir watermelon [Citrullus lanatus (Thunb.) Matsum. & Nakai] types Surme, Beyazkis and Karakis was achieved. Shoot tips from 5-day-old in vitro germinated seedlings were cultured on shoot regeneration medium for 3 weeks. The effects of the different concentrations of benzyl adenine (BA) and carbohydrate types on shoot proliferation were examined. The results confirmed that a range of 0.5-1.0 mg/L of BA was almost equally effective in promoting the shoot length of cultures in the 3 genotypes. Sucrose, in the presence of BA, was superior to other carbohydrates for the 3 genotypes studied in terms of the number of proliferated shoots and the average shoot length obtained. The highest percentage of rooting was achieved when medium supplemented with 1.0 mg/L of indole-3-butyric acid (IBA) was used for the 3 genotypes. The highest frequency of acclimatized plantlets for the 3 genotypes was 85%, 85%, and 90%, respectively, in sterile compost, when the shoots of Beyazkis, Karakis, and Surme were rooted in the IBA-supplemented rooting treatments. The Surme genotype produced a significantly higher yield and mean fruit weight than the Beyazkis and Karakis genotypes in both direct-seeded and transplanted watermelons. The main soluble sugar of the experimental types was separated, identified, and quantified using high performance liquid chromatography (H PLC). Fructose was found to be the most abundant sugar and was highly detected in Beyazkis for the seeded watermelon and in Karakis for the transplanted watermelon. This demonstrates that in vitro propagation can be used to produce high quality diploid Diyarbakir watermelon for use in breeding lines.
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    Simultaneous Removal of Indomethacine, Papaverine and Allopurinol from Aqueous Solution by Using Submerged Aquatic Plant Nasturtium officinale
    (Asian Journal Of Chemistry, 2010) Okumus, Veysi; Oral, Elif; Basaran, Davut; Onay, Ahmet
    Simultaneous removal of indomethacine, papaverine and allopurinol from aqueous solution by using submerged aquatic plant Nasturtium officinale biomass in high performance thin layer chromatography (HPTLC) was studied. Optimum biosorption conditions were determined as a function of contact time, pH, removal capacity of the amount of biomass and initial dry concentration. Experiments were performed in batch conditions. Concentrations of the drugs in the remaining solutions were simultaneously analyzed by HPTLC. Langmuir and Freundlich models were applied to describe the biosorption isotherm of the drugs by aquatic plant Nasturtium officinale biomass. According to the results, optimum parameters were found as 2.0 g biomass, pH:5.0 and 60 min contact time. Obtained from plots of Langmuir and Freundlich adsorption models, the highest drug uptakes were calculated from Langmuir isotherm and found to be 43.10, 39.68 and 38.61 mg/g for indomethacine, papaverine and allopurinol, respectively.