Browsing by Author "Türker, M."

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Allelopathic Potential of Macrofungi on Germinating Maize (Zea Mays L.) Grain
(Academic Journals, 2010) Uzun, Y.; Türker, M.; Kaya, A.; Demirel, K.; Işler, S.; Keleş, A.
The effect of methanol extracts of 10 macrofungi was evaluated on grain germination of maize (Zea mays L.). Germination percentage, radicle and plumule length and the level of carbohydrates and fatty acids were measured. Fungal metabolites inhibited germination up to 90.96%, plumule (97.77%) and radicle (92.83%) development. Plumule and radicle lengths were stimulated 35.26 and 10.60% in some assays, respectively. The fungal metabolites decreased the glucose (97.60%), sucrose (90.34%), fructose (96.85%), maltose (95.64%), oleic acid (97.50%) and linoleic acid (98.25%) levels, whereas increasing levels of the glucose (165.14%), sucrose (166.53%), fructose (83.18%), maltose (124.73%), oleic acid (6975.00%) and linoleic acid (5233.33%) were detected in some assays. It is concluded that macrofungi metabolites have commonly inhibitory effects on physiological and morphological processes of germinating maize grain except for considerable increases in the some parameters investigated. © 2010 Academic Journals.
In Vitro Plant Regeneration Influence by Bap and Iba in Lentils (Lens Culinaris Medik)
(Nobel Science and Research Center, 2014) Özdemir, F.A.; Türker, M.
Lentil is an important food legume crop that is very recalcitrant to shoot regeneration and rooting under in vitro conditions. This study aimed to develop efficient and reliable protocol for in vitro plant regeneration. The reulsts of this study showed that In this context, 16 Turkish lentil cultivars were shoot tip, stem , hypocotyl, cotyledon and root as explants. The MS medium containg 4 mg/l BAP induced maximum number (8.25) of shoots per shoot tip explant of cv. Yesil 21. Whereaas, maximum number (28.33) of shoots per cotyledon explant of cv. Ozbek was induced on MS medium containing 1 mg/l IBA. However,IBA derived shoots were easy to root on MS medium containing 1.87 mg/l NAA. The regenerated explants were transferred to greenhouse for acclimatisation, flowering and seed set. It was concluded that in vitro shoot regeneration of lentils (Lens culinaris Medikus) was strongly influenced by the type of explant, plant growth regulator concentration and combinations.
Seasonal Changes in Cambial Activity in Rosa Canina
(International Society for Horticultural Science, 2005) Türker, M.; Yörük, I.; Battal, P.; Kazankaya, A.; Tileklioǧlu, B.
In the present study, cambial activity and the differentiation of phloem and xylem was studied in plants of Rosa canina L. growing in the Van province, Turkey. This species belongs to the dogroses, which are frequently harvested for their fruits (rose hips). The cambial zone was up to three cells wide. Cambial activity started in the third week of April. Summer wood formation was observed toward the end of May. The mean length and width of cambium cells during spring wood formation was 15.06 μm and 2.70 μm, respectively. During the summer wood formation, length and width was 14.16 μm and 3.16 μm, respectively. In spring wood, the lumen diameter of the biggest vessel was 54.41 μm, whereas the smallest one was 9.58 μm. The equivalent measurements in summer wood yielded 44.16 μm and 9.58 μm, respectively. The mean cell wall thickness of vessels and tracheids in spring wood was 1.87 μm and 3.33 μm, respectively, and 2.08 μm and 5.41 μm in summer wood. Cambial activity ceased toward the end of July. © ISHS 2005.
Seasonal Changes of Endogenous Plant Hormones in Rosa Canina
(International Society for Horticultural Science, 2005) Yörük, I.; Türker, M.; Battal, P.; Kazankaya, A.; Tileklioǧlu, B.
Seasonal changes of gibberellins (GAs), the cytokinin trans-zeatin (t-Z), the auxin indole-3-acetic acid (IAA) and abscisic acid (ABA) in Rosa canina L. were analyzed by high performance liquid chromatography (HPLC). The concentration of GAs increased during the period of rapid growth in April and May, and coincided with the time of the increase in t-Z concentration. The concentration of IAA decreased slightly from January until March, increased strongly in April and then decreased again after the cessation of rapid growth. The concentration of ABA decreased steadily from January to May, followed by a slight increase which became most notable during the fruiting period, reaching a peak in January. © ISHS 2005.