Yazar "Tursun, Ayse Ozlem" seçeneğine göre listele

Listeleniyor 1 - 5 / 5
  • Küçük Resim Yok
    Öğe
    Chemical Composition and Herbicidal Activities of Essential Oil from Aerial Parts of Origanum Hybrids Grown in Different Global Climate Scenarios on Seed Germination of Amaranthus palmeri
    (Taylor & Francis Ltd, 2021) Yasar, Ayse; Karaman, Yucel; Gokbulut, Incilay; Tursun, Ayse Ozlem; Tursun, Nihat; Uremis, Ilhan; Arslan, Mehmet
    The present study aimed to investigate the changes in the essential oil contents of some Origanum hybrids grown at different carbon dioxide (400 and 800 ppm) levels in a fully automated carbon dioxide greenhouse. The chemical composition of essential oils was analyzed gas chromatography/ mass spectrometry (GC/MS). It was found that, among the Origanum hybrids, there were differences between the essential oil contents of those grown under natural conditions and controlled greenhouse conditions. While an increase in carbon dioxide level significantly increased the thymol and carvacrol components, which are among important monoterpene components, of Origanum syriacum x O. onites and O. syriacum x O. vulgare hybrids, whereas it led to a decrease in O. syriacum x O. majorona hybrid. To determine the effects on germination of Amaranthus palmeri S. Watson seeds under laboratory conditions, the essential oils were used at 0.5, 1, 2, and 4 mu l/petri doses. The most effective doses of essential oils for preventing the germination of A. palmeri seed were found to be 2 and 4 mu l/petri. In preventing the germination of seeds, the most effective (100 %) application for all the essential oils was achieved with O. syriacum x O. onites hybrid grown at 800 ppm. These results show that the CO2 increases that may occur as a result of climate change in the next years may lead to changes in the content of essential oils in Origanum hybrids and may have the potential to be used as bio-herbicidal to prevent the germination of A palmeri.
  • Küçük Resim Yok
    Öğe
    CHEMICAL COMPOSITION, PHENOLIC, ANTIOXIDANT, AND BIO-HERBICIDAL PROPERTIES OF THE ESSENTIAL OIL OF ROSEMARY (Rosmarinus officinalis L.)
    (Univ Life Sciences Lublin, 2022) Gokbulut, Incilay; Karaman, Yucel; Tursun, Ayse Ozlem
    The essential oil yield was obtained from the rosemary plant at the rate of 0.93 mL/100 g, and 1,8-cineol, camphor, isoborneol, alpha-pinene were identified as the highest component. While the total phenolic content in the essential oil of the rosemary plant was 13.87 mg GAE/g (DW) and the IC50 value was 15.02 mu g extract mL(-1), the DPPH antioxidant activity value was obtained as 38.43%. For the investigation of herbicidal effect of the essential oils on seed germination , different doses (0.5, 1.0, 2.0, 4.0, 8.0 and 16.0 mu L Petri(-1)) were used on 2 crop plants (pepper and wheat) and 4 weeds: (Amaranthus palmeri S. Wats.), (Amaranthus albus L.), (Avena fatua L.) and (Sinapis arvensis L.). It was determined that as the applied amount of essential oil increased, the germination of the seeds was more suppressed. The highest effect of essential oil was detected in 16 mu l Petri(-1) dose application in all treated seeds.
  • Küçük Resim Yok
    Öğe
    Effects of Different Practices on Seed Germination of Some Weeds Which is used as Medical
    (Kahramanmaras Sutcu Imam Univ Rektorlugu, 2015) Tursun, Ayse Ozlem; Dayisoylu, K. Sinan; Tursun, Nihat
    Study was conducted to determine the effect of temperature, scarification, the pH, light duration and salt concentration on Senecio vulgaris L., Taraxacum officinale L. and Tragopogo pratensis L. seeds. In the study results were determined the highest germination rate in 15 degrees C for S. vulgaris, 20 degrees C for T. officinale and 10 degrees C for T. pratensis, at each of the three seeds in 6 months in waiting period, 7 for pH, 16 hours light / 8 hours dark for S. vulgaris and T. officinale, 24 hours darkness for T. pratensis and in control for salt concentration in each of the three seeds. In case of the culture of these three weeds which used medical should be taken into the consideration to these conditions.
  • Küçük Resim Yok
    Öğe
    Effects of Different Sowing Arrangements and Nitrogen Applications on Yield and Yield Components of Oilseed Sunflower in Dryland Conditions
    (Kahramanmaras Sutcu Imam Univ, 2016) Tursun, Ayse Ozlem; Killi, Fatih
    The purpose of this study was to investigate the effects of various sowing arrangements and nitrogen applications on yield and yield components on dryland in Kahramanmaras in 2008 and 2009. The experiment was set according to split plot experimental design with four replications; sowing arrangements (skip-row-1, skip-row-2, conventional sowing, and narrow-row sowing) were assigned to main plots and nitrogen doses (0, 4, 8, 12 kg N da(-1)) to sub-plots. In the study, protein content (%), head diameter (cm), 1000-seed weight (gr), oil ratio (%), seed yield (kg da-1), oil yield (kg da-1) were investigated. End of the study, sowing arrangements statistically significant affected all traits except for oil ratio, while N application had arrangements statistically significant effects on traits besides head diameter and oil ratio. Depending on sowing arrangement and N application seed yield varied between 114.04 kg da(-1) (Skip-row 2) and 250.15 kg da(-1) (narrow row), and between 163.87 kg da(-1) (control) and 187.92 kg da(-1) (8 kg da(-1) N) respectively. The highest seed and oil yields were obtained from narrow row arrangement with 8 kg da(-1) N application.
  • Küçük Resim Yok
    Öğe
    Effects of Elevated Temperature and Carbon Dioxide Concentrations on Aromatic Compounds of Stevia rebaudiana
    (Springer India, 2021) Tursun, Ayse Ozlem; Jabran, Khawar; Gurkan, Hacer; Telci, Isa
    A global rise in CO2 concentration and temperature levels can impact the living part of the earth including the plants. Stevia or candy leaf (Stevia rebaudiana Bertoni) is a medicinal aromatic plant that produces several useful chemical compounds. Studies were carried out in a fully automated greenhouse in order to determine the response of aromatic compounds of stevia leaves to different CO2 concentrations and temperature levels. This study had four treatments including (1) 26 +/- 1/16 +/- 1 degrees C day/night temperature plus 400 +/- 50 ppm CO2 concentration [control], (2) 29 +/- 1/19 +/- 1 degrees C day/night temperature plus 600 +/- 50 ppm CO2 concentration, (3) 32 +/- 1/22 +/- 1 degrees C day/night temperature plus 800 +/- 50 ppm CO2 concentration and (4) 35 +/- 1/25 +/- 1 degrees C day/night temperature plus 1000 +/- 50 ppm CO2 concentration. Results of the study showed that yield of total aromatic compounds ranged between 12.65 and 13.65 mu g/g for stevia . Generally, concentrations of the compounds such as ketones, aldehydes and alcohols were decreased with increase in concentration of CO2 and temperature. Terpenes were the compounds whose concentrations were increased with increase in concentration of CO2 and temperature. The climatic conditions did not cause a significant change in the aromatic compounds of stevia.