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    Carolina poplar (Populus x canadensis Moench) as a biomonitor of trace elements in Black sea region of Turkey
    (Triveni Enterprises, 2010) Celik, Sehnaz; Yucel, Ersin; Celik, Sezgin; Gucel, Salih; Ozturk, Munir
    In this study, the leaves, bark and the soil supporting Populus x canadensis Moench were tested as a possible biomonitor of trace element pollution in the Middle Black Sea region of Turkey The investigations were carried out at 23 sites. The leaves, bark and soil were analyzed for Pb++, Cd++, Fe++, Cu++ and Zn++ contents. The values of Pb++, Cd++, Fe++, Cu++ and Zn++ in the leaves varied between 14.5-40.0, 0.5-1.5, 135-486, 5.0-14.0 and 43-246 ppm, respectively. In the bark the values were between 15.5-36.5 (Pb++), 1.5-2.0 (Cd++), 39-575 (Fe++), 5.0-14.0 (Cu++) and 40.0-1468 ppm (Zn++), whereas in the soil values forPb** were 1.0-4.1 ppm, for Cd++ 0.2 ppm, for Fe++ 0.6-1.8 ppm, for Cu++ 0.1-0.9 ppm and for Zn++ 0.1-1.9 ppm. A positive correlation was found between traffic density and the amount of Pb++, Fe++ and Cu++ in leaves, while a negative correlation was documented for Cd++ and Zn++. In the bark samples there was a positive correlation between traffic density and Pb++, and a negative one with Cd++, Fe++, Cu++ and Zn++. Apositive correlation was determined between traffic density and the amount of Pb++, Fe++, Cu++ and Zn++ in soil. However, the amount of Cd++ was 0.2 ppm and no relationship between Cd++ and traffic density was observed.
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    Öğe
    Conservation strategy of critical endemic Centaurea hausknetchii Boiss. (Section : Cyanoroides) and effects of different salt, nitrate and acid concentrations on the germination of seeds
    (Asian Journal Of Chemistry, 2008) Celik, Sezgin; Yucel, Ersin
    Centaurea hausknetchii is a local endemic species growing only in the Nemrut Mountain Historical National Park in the Southeast Anatolian region of Turkey. It grows in three small areas of this mountain and all these areas are under heavy grazing pressure. The germination behaviour of the seeds was studied and for this purpose seeds were left under two different photoperiods (8 h light-16 h darkness and 16 h light-8 h darkness) and treated with different concentratios of NaCl, KNO(3), H(2)SO(4) and HCl solutions. There was no germination in 3 % NaCl, 1-3 % KNO(3), 1-3 % H(2)SO(4) and 2-3 % HCl concentrations in each photoperiod. According to the univariate variance analysis of germination Lest results, germination media with different salts, nitrate and acid concentration (e.g., 0.5 %,1.0 %, 2.0 % NaCl; 0.5 %.1.0 %.2.0 %,3.0 % KNO(3); 0.5 % H(2)SO(4); 0.5 %, 1.0 % HCl) under different photoperiods (8 h light-16 h darkness and 16 h light-8 h darkness and 24 h light) and control have been investigated. The photoperiod and photo period-treatment interaction had a significant impact on the germination percentage and rate (p < 0.05). C. hausknetchii is in the critically endangered category (CR) in the IUCN 2000 Red Data Book. The habitat characteristics of the distribution sites were thus investigated, vegetative growth behaviour followed and interrelations between the increase and spread of populations recorded. The factors effecting the productivity were determined. This report will be helpful in the population biology studies and development of alternatives for effective protection programme.