Browsing by Author "Taban S."

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Effect of calcium on the alleviation of boron toxicity and localization of boron and calcium in cell wall of wheat
(2009-12-01) Turan M.; Taban N.; Taban S.
A greenhouse experiment involving four levels of B (0, 5, 10 and 20 mg B kg-1 as boric acid, H3BO3), and three levels of Ca (0, 100 and 200 mg Ca kg-1 calcium chloride, CaCl2) were conducted on wheat plants (Triticum aestivum L. 'Gerek-79'). Boron toxicity symptoms strongly occurred at 10 and 20 mg B kg-1 levels with and without applied Ca. Without applied calcium, boron toxicity symptoms were also weakly expressed at 5 mg B kg-1 level. Growing wheat plants with application of high levels of Ca partially alleviated the toxicity symptoms. Shoot and root dry weight of plant was strongly depressed and decreased by applied boron; however, Ca applications reduced the inhibitory effect of B on the plant growth. Shoot and root boron concentrations and boron uptake were increased with increasing B application, but decreased with Ca applications. Controversially, applied calcium increased calcium concentrations and uptake and decreased boron concentrations and uptake. Most of total boron and calcium were localized in the cell wall of plant. While applied boron increased the concentration of B on the cell wall, it decreased the concentration of Ca on the cell wall. In addition, applied calcium increased the cell wall calcium concentration, whereas decreased the cell wall boron concentration. It was determined that boron toxicity could be alleviated by addition of calcium in plant growing media.
Effect of salt stress on growth and ion distribution and accumulation in shoot and root of maize plant
(2010-04-04) Turan M.A.; Elkarim A.H.A.; Taban N.; Taban S.
In this study, effect of applied NaCl on shoot and root growth and distribution and accumulation of Na, Cl, N, P, K, Ca, Fe, Zn and Mn in shoot and root of the maize plant (Zea mays L. cv: RX 947) was investigated. The experiment was arranged in a completely randomized design (CRD) under the greenhouse condition. Sodium chloride was applied at the rates of 0, 25, 50, 75 and 100 mM NaCl. Shoot and root growth of the maize plants was inhibited by salinity and NaCl significantly decreased shoot and root dry mass of maize plants. Sodium chloride caused to increase Na, Cl, P, Zn and Mn concentrations in the shoot and root. Applied NaCl decreased N, Ca and Fe concentrations in the shoot, increased N, Ca and Fe concentrations in the root. Sodium, Cl, N, P, Ca, Fe, Zn and Mn accumulated in the root in according to applied NaCl. © 2010 Academic Journals.
Effect of salt stress on growth, stomatal resistance, proline and chlorophyll concentrations on maize plant
(2009-09-01) Turan M.; Elkarim A.; Taban N.; Taban S.
In this study, effect of applied NaCl on growth and stomatal resistance, proline and total chlorophyll concentrations of maize plant (Zea mays L. cv: RX 947) was investigated. The experiment was arranged in a completely randomized design with four replications under the greenhouse condition. The experimental soil was salinized with NaCl at the rates of 0 and 100 mM NaCl. Growth of the maize plants was inhibited by salinity. Applied NaCl significantly decreased dry mass of maize plants. Stomatal resistance and proline concentrations were increased by high salinity, while total chlorophyll concentration was decreased. NaCl caused to increase Na and Cl concentrations of plant. © 2009 Academic Journals.
Effects of cobalt on some physiological parameters of common bean (Phaselous vulgarís L.)
(2009-01-01) Halilova H.; Ok S.S.; Taban S.
A greenhouse experiment was carried out in an alkaline soil to study effects of cobalt on the nitrogen-reductase activity, total chlorophyll, nitrogen and cobalt contents of bean plant. The results showed that nitrogen-reductase enzyme activity increased at higher cobalt applica- tions comparing to the control. Total chlorophyll content of the plants was affected by cobalt treatments statistically. As cobalt concentrations increased, total chlorophyll content of the plants decreased below the control. Dry weights of plants indicated that growth was increased at low cobalt concentrations, while was decreased as cobalt concentrations increased. Nitrogen content of the plants increased at 0.10 μg g-1 cobalt treatment and then decreased with the increasing applications.
Selenium concentration of garlic bulbs grown in different parts of Turkey
(2010-01-01) Turan M.A.; Taban N.; Türkmen N.; Taban S.
The aim of this study is to evaluate the selenium concentration of garlic bulbs, which are widely grown in different parts of Turkey. For this purpose, 88 samples of garlic bulbs were collected from eight intensive garlic growing areas of Turkey, namely, Kastamonu (23), Balikesir (18), Kirklareli (11), Mugla (9), Kahramanmaras (8), Karaman (6), Hatay (8) and Antalya (5). The selenium concentrations of the garlic bulbs were determined using ICP-OES techniques. The selenium concentrations in the dry and fresh weight of garlic bulbs were determined as being in the ranges 1.85-9.33 mg/kg and 0.46-2.33 mg/kg, respectively. The overall average of the 88 samples was found to be 3.87 mg/kg in dry weight and 0.97 mg/kg in fresh weight. As a result, the garlic bulbs from Kastamonu showed the highest selenium concentration, which indicates that the recommended dietary allowance of selenium, 70 micrograms, could be supplied by these garlic bulbs.