Browsing by Author "Celik E.N.Y."

Now showing 1 - 2 of 2

Age-related changes of some chemical components in the leaves of sweet chestnut (Castanea sativa Mill.)
(2020-05-01) Turfan N.; Ayan S.; Celik E.N.Y.; Ozel H.B.; Onat S.M.
The aim of this study was to investigate the developmental physiology of sweet chestnut trees (Castanea sativa Mill.) of different age groups (≥ 25, ≥ 50, ≥ 100, ≥ 200, and ≥ 400) in the Catalzeytin district of Kastamonu, Turkey. For this purpose, photosynthetic pigments, proline, total soluble protein, glucose, sucrose, total soluble carbohydrate and starch values, malondialdehyde (MDA) and hydrogen peroxide (H2O2) concentration, and also ascorbate peroxidase (APX), catalase (CAT), and superoxide dismutase (SOD) activities were measured in leaf samples. Hence, significant differences were found in the amounts and concentrations of all types of chlorophyll, carotenoid, proline, total soluble protein, glucose, sucrose, total soluble carbohydrate, starches, MDA, H2O2, APX, CAT, and SOD among the trees of different age groups. While the chlorophyll a value was low in young trees, the chlorophyll b value was low in older trees. It was determined that the MDA content was high in old trees, whereas it was low in young trees. While the amounts of glucose, sucrose, total soluble carbohydrate, and starch were highest in ≥ 400-year-old trees, they were lowest in the young trees. Both APX and CAT activities were high in young trees, whereas SOD activity was lowest in ≥ 400-year-old trees.
The effects on the soil nutrient content of douglas fir and kazdagi fir in cangal forests in ayancik, Sinop, Turkey
(2020-07-01) Eshaibi J.A.H.; Ayan S.; Ozel H.B.; Celik E.N.Y.; Kuscu I.S.K.; Akin S.S.; Gulseven O.; Yilmaz E.
The aim of the study was to compare the influence on nutrient pool in the soil of Douglas fir {Pseudotsuga menziesii (Mirb.) Franco), as exotic fast growing species, and Kazdagi fir (Abies normanniana subsp. equi-trojani (Asch.&Sint. ex Boiss) as native species. The study was conducted within a single stand, Cangal forest in Ayancik, Sinop located western Black Sea Region, the first plantation site in Turkey, in order to reduce variation in abiotic factors. Soil samples were collected from two different sample areas belonging to each species from natural Kazdagi fir and Douglas fir stands and each sample was taken from three different points and two levels (0-15 cm and 15-30 cm). C and N elements were analysed using elemental analyser, and basic macro and micro elements were determined by using TurboQuantPowders N method as a percentage with XRF. According to the results of the variance analysis, the factors of tree species and soil depth are found to be affecting N, C and ZnO (F =9.038**; F =9.294***; F =2.476**) significantly. However, there is no significant effect on the other 26 nutrients. Strong positive and negative correlations were found between many nutrients. In the upper soil at 0-15 cm, N was determined to be higher compared to both the lower soil under Douglas fir stand and the Kazdagi fir stand. Douglas fir has a nitrogen increasing effect on soil content. With further research, the research question should be questioned in relation to stand characteristics and growth based on long-term observations and measurements.