Browsing by Author "Toncer, Ozlem"

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Effects of Zno Nanoparticules Produced by Green Synthesis on Germination and Seedling Of Salvia Officinalis L. Seeds
(Polish Society Magnesium Research, 2021) Gunes, Zubeyir; Toncer, Ozlem; Eren, Abdullah
Nanotechnology is a research subject in many interdisciplinary engineering fields today. Nanoparticles have important effects on seed germination and seedling growth of plants. The aim of this study has been to produce a 54.68 nm-sized ZnO nanoparticle obtained from the Nigella sativa L. plant by green synthesis. The effect of medicinal sage (Salvia officinalis L.) on germination of plant seeds and seedling growth was investigated. The trial was set up under controlled conditions and conducted for 14 days according to a factorial trial design with 5 replications for each dose (0, 0.5, 1.5 and 2.5 mg ZnO NP kg-1). As a result of ZnO NP application in different doses, germination of Salvia officinalis L. seeds varied between 90-94%, stem length was 1.86-2.92 cm and shoot length was between 1.01-1.98 cm. The highest root and shoot length was obtained after the application of 2.5 mg ZnO kg-1 NP. In the light of the results, ZnO nanoparticles are thought to be useful for seed development and agricultural applications.
Evaluation of Some Black Cumin Seed (Nigella sativa L.) Genotypes in Terms of Quality Parameters at Different Planting Periods Under Mardin Ecological Conditions
(Univ Quindio, 2023) Gunes, Zubeyir; Toncer, Ozlem
This research was carried out with 3 repetitions according to the randomized blocks trial design in winter and summer planting periods of 2018-2019 and 2019-2020 in order to determine the agronomic and quality characteristics of some black cumin genotypes at different sowing periods under Mardin ecological conditions. cameli variety and 18 different black cumin seed genotypes were used in the study and some quality parameters were examined. According to the results obtained from the research, it was determined that fatty oil ratio varied between 32.45-39.02% and fatty oil yield varied between 12.94-42.72 kg da-1 in winter planting. In summer planting; fatty oil ratio ranged between 33.99-38.13% and fatty oil yield ranged between 9.69-25.18 kg da-1. As a result of the study, it was determined that Eskisehir-5 (G9) genotype performed better than other varieties and genotypes in terms of fatty oil yield under Mardin ecological conditions. Due to the early increase in temperature in Mardin conditions, quality parameters decreased in summer planting compared to winter planting. Therefore, winter planting is recommended as the most suitable planting time for black cumin cultivation under Mardin conditions.
Interactive Effects of Number of Plants and Nitrogen Fertilization on Quality Parameters of salvia Officinalis L. Cultivated in Semi-Arid Environments
(Taylor & Francis Ltd, 2024) Izgi, Mehmet Necat; Karaman, Sengul; Toncer, Ozlem
This research aimed to elucidate the interplay between number of plants and nitrogen dose on the agronomic attributes, as well as the essential oil yield and composition of Salvia officinalis L. (sage) in the challenging ecological conditions of Mardin, situated in South Eastern Anatolia. A split-plot experimental design was employed during 2018-2019, manipulating the variables of number of plants and nitrogen application rates. The experiment identified camphor, 1,8-cineole, alpha-thujone, and beta-thujone as the major components. The PCA analysis unveiled statistically significant inverse correlations between the concentration of camphor and 1,8-cineole, as well as alpha- and beta-thujone. The results demonstrated that the combination of lower plant number with elevated nitrogen levels yielded higher fresh herb dry herb and dry leaf. While lower plant number and higher nitrogen application independently exerted positive influences on essential oil production and yield, the interactive impact of these treatments yielded inconclusive results. Specifically, nitrogen treatments led to an increase in camphor content while reducing alpha- and beta-thujone contents in the essential oil. Conversely, lower plant numbers resulted in decreased camphor content and an increase in thujone content within the oil. In light of these findings, it is recommended that, under semi-arid conditions, optimal yields can be achieved by employing plant number of 50000 plants ha(-1) and a nitrogen fertilizer rate of 120 kg ha(-1). This research sheds light on the intricate relationship between agronomic factors and the quality of sage cultivation, offering valuable insights into sustainable agricultural practices in semi-arid regions.