Browsing by Author "Temel SARIYILDIZ, Gamze SAVACI, Nezahat TURFAN"

Now showing 1 - 2 of 2

Effects of Iron-Steel Factory and Dense Traffic on Leaf Chemical Compounds of Six Tree Species in Turkey
(2018.01.01) Turfan, N, Savaci, G, Sariyildiz, T; Temel SARIYILDIZ, Gamze SAVACI, Nezahat TURFAN
Aim of study: Tree planting can play an important role in improving the quality of the urban environment. On the other hand, air pollutants can affect growth and health of trees. We studied the impacts of air pollution caused by the iron - steel factory and dense traffic on leaf chemical composition and also tree tolerance to the air pollution using six tree species (Maple, Ash tree, Cypress, Black pine, Sycamore and Aspen).Material and Methods: The fresh leaf and needle sampling was carried out in April and July, and analyzed for photosynthetic pigments, peroxidation level, hydrogen peroxide, enzymatic antioxidants and non-enzymatic antioxidants.Main results : Although there were statistically significant variations in the studied chemical compositions of the fresh leaf and needle samples between the six tree species, the pollution types and time, each chemical factor acted different ways with the pollution types and time according to tree species. In general, the pigment values, MDA, H2O2 and APX, concentrations in July were lower than those in April, whereas CAT, SOD, proline and protein concentrations in July were higher than those in April. Maple tree was more resistant to the traffic pollution, while Ash tree was more tolerant to both the pollution types. Among all trees, Aspen was found more susceptible to the traffic pollutionResearch highlights: The results could be used in the future research directions to improve our understanding of the role of individual tree species in air pollution reduction and also set up a healthy, well managed urban forest which can provide many ecological benefits to urban environment.
Variation in chemical compounds of walnut (Juglans regia L.) leaves with tree age
(2020-11-01) Temel SARIYILDIZ, Gamze SAVACI, Nezahat TURFAN
In this present study, we investigated the chemical compounds in the fresh leaves of ancient walnuttrees (Juglans regia L.) aged 25, 75, 100, and over 400 year. Under similar environmental conditions,the fresh leaves of walnut trees were collected and analysed for chlorophyll molecules as chlorophylla, chlorophyll b and carotenoids, enzymatic compounds (ascorbate peroxidase (APX), catalase (CAT)and superoxide dismutase (SOD) activities) and non-enzymatic compounds (proline, total solubleprotein, total phenolic compounds), flavonoid and reducing sugars (glucose, sucrose, total solublesugar). In addition, the oxidative stress level was determined by measuring lipid peroxidation (MDAmalondialdehyde)and hydrogen peroxide (H2O2). Significant differences in the chemical compositionof the fresh leaves were found between the 4 different tree age classes. In general, the results showedthat mean chlorophyll pigments were increased with increasing the age. There was also a generaltrend that mean glucose and starch concentrations increased with the age, while mean sucroseconcentration decreased, but no changes were noted for mean total soluble carbohydrate. On theother hand, mean SOD concentration decreased with increasing the age. Other chemical compounds(mean proline, total soluble protein, malondialdehyde, hydrogen peroxide, APX and CAT), however,did not show clear trends with the age. As a result, these pioneer study have provided valuable insightinto the variation in the chemical constituents of walnut tree leaves in relation to the age, and it canbe used to better understanding, managing and fighting against pathogens of walnut ecosystems infuture studies.