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Öğe DIFFERENT APPROACHES ON BULBLET FORMATION WITH SCALING IN MADONNA LILY (LILIUM CANDIDUM)(Univ Agricultural Sciences & Veterinary Medicine Bucharest, 2016) Akcal, Arda; Kahraman, OzgurThe purpose of this study was, to determine the effects of different treatments on bulblet formation with scale propagation in 'Madonna lily' (Lilium candidum). The research was conducted in growth chamber at Eanakkale Onsekiz Mart University, Faculty of Agriculture, Department of Horticulture in 2015-2016. Scales of Lilium candidum bulbs with 22-24 cm circumference, were used as a plant material. Effects of different incubation periods (10,12,14 weeks), incubation temperatures (10-15 degrees C, 20-25 degrees C), auxin (IBA 100 ppm, IBA 200 ppm) doses and scale positions (outer, middle, inner, center) on bulblet formation were investigated. The experiment was established according to randomised plot design with 3 replications. Some parameters like, bulblet formation ratio, bulblet number per scale, weight, diameter and height of bulblet, scale number, root number and root length of bulblet were also determined. As a conclusion, treatments have not any significant effect on bulblet formation ratio, but there were significant differences between the other parameters for some of treatments. In spite of this, incubation period of 14 weeks gives the highest average value for bulblet number per scale (1.467 piece) and bulblet height (19.105 mm). Also, the highest average value of bulblet weight (0.792 g) and bulblet diameter (13.282 mm) were measured in outer scales. While incubation temperature of 10-15 degrees C gives the best result for bulblet scale number (3.511 piece), the highest average value for root number of bulblet (3.900 piece) and root length of bulblet (11.224 cm) were measured in auxin dose of 200 ppm IBA.Öğe Pollen of Arbutus unedo: Effects of plant growth regulators(Univ Belgrade, Inst Botany & Botanical Garden, 2020) Gokbayrak, Zeliha; Engin, Hakan; Akcal, Arda; Kiraz, HaticeArbutus unedo is a species mainly used for landscaping purposes and lately for honey production. Its antioxidant characteristics have also been a subject of of research interest. The germination of pollen grains freshly collected from flowers was tested in vitro, and 30% sucrose gave the highest pollen germination. Subsequently, three growth regulators belonging to the categories of gibberellins and brassinosteroids [24-epibrassinolide (Ebl) and 22S,23S-homobrassinolide (Hbl)] were added to the growth medium singly or in double combinations (gibberellin + brassinosteroid), and the petri dishes were kept for 24 hours at 26 +/- 1 degrees C. The results showed that the highest germination rates were obtained from treatments with 0.01 ppm Hbl (45.47%) and 0.001 ppm Hbl (26.74%). They were followed by treatments with 0.001 ppm Ebl, 25 ppm GA(3) and 0.1 ppm Ebl. As the concentration of GA(3) increased, the germination rate declined considerably. Statistical analysis of the combined treatments showed that combinations of growth regulators lowered the germination rates compared to their individual application. Moreover, action of the lowest GA(3) concentration (25 ppm) best matched the effects of brassinosteroids, and increasing the GA(3) concentration in combined treatments did not improve germination. The highest germination was obtained with 0.1 ppm Hbl, followed by all Ebl treatments. Brassinosteroids might be an inducer of pollen germination in plants depending on their type and concentrations. When individually included in the growth medium, the extent of this induction was greater with the homobrassinolide than with the epibrassinolide. Their interactions with gibberellins are shown to be mostly dependent on the concentration of gibberellic acid used. The tested epibrassinolide was more consistent than the homobrassinolide in maintaining higher germination levels. The findings of this study indicate that gathering more information from studies involving other plant species is needed to clarify the role of brassinosteroids in in vitro and in vivo germination.Öğe THE ENLARGEMENT OF LEUCOJUM AESTIVUM L. IN DIFFERENT SUBSTRATES UNDER GREENHOUSE CONDITION(Univ Agricultural Sciences & Veterinary Medicine Bucharest, 2016) Kahraman, Ozgur; Akcal, ArdaLeucojum aestivum L. (summer snowflakes) is one of the species permitted to export in a limited number from Turkey. 6-7 million summer snowflakes bulbs with more than 7.5 cm circumference are exported to the Netherlands, Denmark and USA. The bulbs obtained from propagation methods are only permitted to export. This study was conducted to enlarge the circumference of snowflakes bulb by using soilless culture techniques in different substrates such as sawdust, cocopeat and perlite+ peat in a short time in a part of unheated glasshouse which belongs to Eanakkale Onsekiz Mart University, Faculty of Agriculture, Department of Horticulture, 2014-2015. The study was established according to randomised plot design with 3 replications and each plot had 20 bulbs of Leucojum aestivum L. Some parameters like, bulb diameter, bulb height, bulb weight, stem diameter, stem and leaf weight, dry stem and leaf weight, leaf number, leaf length, leaf thickness, leaf width, root length, root weight, dry root weight and emerging ratio were determined. As a result of the study, substrates have a significant effect on bulb diameter, bulb height, bulb weight, stem and leaf weight, dry stem and leaf weight, leaf number, leaf length, leaf thickness, leaf width, root length, root weight, dry root weight and emerging ratio. However, there was no significant difference between substrate treatments for the stem diameter. The highest average value of bulb diameter (24.80 mm), bulb height (35.38 g) and bulb weight (10.29 g) were measured in perlite+ peat. While perlite+ peat gives the best result for leaf length (31.23 cm), the highest average value for root length (22.58 cm) were measured in cocopeat.Öğe The response of Cyclamen hederifolium to water stress induced by different irrigation levels(2009) Yildirim, Murat; Akcal, Arda; Kaynas, KenanThe purpose of this study was to examine the effects of different irrigation levels on morphological and physiological parameters of Cyclamen hederifolium. Irrigation applications was scheduled as 40% of the available water was depleted in the root zone in the full irrigation and intended to refill the root zone up to field capacity. In the deficit treatments, water was applied in the range of 75% (I.75), 50% (I.50) and 25% (I.25) of the full irrigation. Deficit irrigation regimes reduced the applied water at the average rates of 17, 37 and 50%, respectively. Although the highest amount of applied water was in the Ir0 treatment, deficit irrigation application of I.50 (114 mm water applied) exibited good development on some morphological and physiological characters of C. hederifolium; leaf area index (LAI), water use effi ciency, and also tuber development were the highest in the treatment of I.50. Our results clearly indicate that more than 114 mm irrigation water is an excessive water application, adversely less than that amount has negative effects on the morphological and physiological parameters of the bulbs of C. hederifolium. © 2009 Academic Journals.
