Browsing by Author "Çelik, E.N.Y."

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Effect of drought and soil heavy metal contamination on three maple species: a case study of Kastamonu University campus in Türkiye
(2023) Savacı, G.; Ünal, S.; Çelik, E.N.Y.; Karadeniz, M.
This study investigated the effects of heavy metals and drought on tree drying in three maple species located in the Kastamonu Campus in northwestern Türkiye. Soil samples were taken from 0-30 cm depth under maple species, and some soil properties were analyzed. The standardized precipitation evapotranspiration index was calculated for the drought impression using 71 years of climate data. The severe drought has had its effect (1.516) since August 2020. There was an extreme drought in January and February 2021 (-2.032 and -2.076, respectively), and this drought effect lasted until August as a severe drought. Chromium concentration at maple species was almost twice higher than the Maximum Allowable Limit for Türkiye (> 100 mg kg). The highest nickel concentration was found under Acer pseudoplatanus (97.25 mg kg) and Acer negundo (108.13 mg kg). The sampling sites were nonsignificant for copper (p = 0.806), lead (p = 0.916), and zinc (p = 0.866) heavy metals. Phyllosticta minima and Phyllactinia marissallii were detected in maple trees. In conclusion, it is understood that drought and heavy metal accumulation (chromium, nickel) in the soil affect tree drying. Physiological drought was first seen in trees due to the lack of rainfall in 2020. Soils were contaminated with heavy metals, and finally, diseases were seen. These results show that adverse climate events due to global climate change will have a negative impact on the growth and development of maple species, as their severity is expected to increase in the next few years.
Effect of drought and soil heavy metal contamination on three maple species: a case study of Kastamonu University campus in Türkiye
(2024.01.01) Savaci, G.; Ünal, S.; Çelik, E.N.Y.; Karadeniz, M.
This study investigated the effects of heavy metals and drought on tree drying in three maple species located in the Kastamonu Campus in northwestern Turkiye. Soil samples were taken from 0-30 cm depth under maple species, and some soil properties were analyzed. The standardized precipitation evapotranspiration index was calculated for the drought impression using 71 years of climate data. The severe drought has had its effect (1.516) since August 2020. There was an extreme drought in January and February 2021 (-2.032 and -2.076, respectively), and this drought effect lasted until August as a severe drought. Chromium concentration at maple species was almost twice higher than the Maximum Allowable Limit for Turkiye (> 100 mg kg(-1)). The highest nickel concentration was found under Acer pseudoplatanus (97.25 mg kg(-1)) and Acer negundo (108.13 mg kg(-1)). The sampling sites were nonsignificant for copper (p = 0.806), lead (p = 0.916), and zinc (p = 0.866) heavy metals. Phyllosticta minima and Phyllactinia marissallii were detected in maple trees. In conclusion, it is understood that drought and heavy metal accumulation (chromium, nickel) in the soil affect tree drying. Physiological drought was first seen in trees due to the lack of rainfall in 2020. Soils were contaminated with heavy metals, and finally, diseases were seen. These results show that adverse climate events due to global climate change will have a negative impact on the growth and development of maple species, as their severity is expected to increase in the next few years.
Effects of Nanoparticle Applications on Seedling Survival and Morphological Characteristics in Scots Pine Afforestation
(2023.01.01) Ayan, S.; Çelik, E.N.Y.; Gülseven, O.; Yer, B.M.; Eskiömer, M.
This study was conducted in the afforestation area, using bare-root 2+0-year-old Scots pine seedlings from Kastamonu. The study aimed to determine the impact of nanoparticle (NP) applications on seedling morphological characteristics and seedling survival success. Three different concentrations (low, medium, high) and four different nanoparticle types [Fe3O4, CuO, ZnO, TiO2] were applied to the plant root-dipping method in the study. The effects of NP treatments on seedling height (SH), root collar diameter (RCD), stem fresh weight (SFW), root new weight (RFW), seedling fresh weight (SEFW), root dry weight (RDW), stem dry weight (SDW), seedling dry weight (SEDW), sturdiness quotient (SI), root: shoot ratio (R/S), and seedling survival in the field were evaluated. The study results revealed that NP types significantly affected all seedling variables except RFW, SDW, RDW, and SEDW, and NP doses significantly affected all seedling variables except RFW. The binary interaction effects of NP types and doses had a significant effect on all seedling variables, and higher values were obtained compared to the control treatment. Medium and high NP doses were more effective in seedling growth than low doses; the percentage of seedling survival was 61.4% in the control treatment and 95% in the TiO2-Medium NP treatment combination.
Variation of biochemical content in the almonds of the endemic Argan tree (Argania spinosa (L.) Skeels) populations in Morocco
(2024) Ayan, S.; Abdaloglu, G.; Laaribya, S.; Turfan, N.; Çelik, E.N.Y.; Ouhaddou, H.; Alaoui, A.
In this study, it was aimed to determine the variation of the biochemical characteristics of the argan [Argania spinosa (L.) Skeels] in natural distribution areas in Morocco. For this aim, it was used 13 populations, which are representative of the taxon on different sub-ecoregion in Morocco, to determine some biochemical compositions characters such as malondialdehyde (MDA), hydrogen peroxide (H2O2), proline, protein, flavonoid, phenol, glucose, sucrose, fructose, enzyme activities of superoxide dismutase (SOD), and peroxidase (POD) were analyzed. To determine variations among the population were analyzed using ANOVA. In addition, the phylogenetic relationship among the populations was revealed by Cluster Analysis. As a result of the research, significant differences were determined in terms of all parameters such as proline, protein, flavonoid, phenol, glucose, sucrose, fructose, MDA, H2O2, SOD, and POD of almond diversity among the populations. According to the Cluster Analysis, the results showed that the Tamanar population was relatively different from all other populations. The results obtained in the research confirm the high variety of different habitats in the natural distribution areas of argan in Morocco. The revealing of the diversity among the populations in the natural distribution area of this extremely degraded species is of primary importance for the conservation policies and sustainable use of the species.