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Öğe Effect of Natural Lipid on Flowering, Pollination Traits and Fruit Set on Loquat (Eriobotrya japonica Lindl.)(Asian Journal Of Chemistry, 2009) Demirkeser, T. H.; Polat, A. A.; Caliskan, O.In this study, the possible effects of lysophosphatidylethanolamine when applied onto eight-year-old Eriobotrya japonica Lindl. loquat cultivar is investigated. Treatments included both single and double applications of lysophosphatidylethanolamine sprayed before bloom and an untreated control. The treated buds were sampled from trees for laboratory pollen experiment and the trees were observed for several flowering, fruit set and harvest traits. In laboratory experiment, the pollen grains were sowed on media having various sucrose concentrations (5, 10, 15 and 20 %) and incubated on 10, 15 and 20 degrees C. It was observed that pollen germination and tube growth increased on 15 and 20 degrees C incubation temperatures and 10 and 20 % concentrations. The experiment also indicated that single lysophosphatidylethanol ami ne application increased the pollen viability rate (%). Pollen germination rate (%) and pollen tube growth were negatively affected by lysophosphatidylethanolamine treatments when evaluated after 3, 6 and 9 h incubation. The field observations indicated that lysophosphatidylethanolamine conditioned earliness for flowering and harvest date. The double application also had significantly higher fruit set comparing the control. Taken together, the results indicate that lysophosphatidylethanolamine applications may be beneficial for fruit set and earliness in. loquat production.Öğe Yield and fruit quality performance of Nova and Robinson mandarins on three rootstocks in Eastern Mediterranean(Academic Journals, 2009) Demirkeser, T. H.; Kaplankiran, M.; Toplu, C.; Yildiz, E.Yield and fruit quality performances of Nova and Robinson mandarins were evaluated in the Mediterranean climate of Dortyol, Hatay, Turkey from 2002 to 2007. The cumulative yields of both Nova and Robinson mandarins over this 6 year production period were highest on Carrizo citrange and smallest on Troyer citrange. The fruit weight and seed content were affected by the rootstock in Nova mandarin. The heaviest fruits were obtained from Troyer citrange. For Robinson mandarins, the fruit weight and size were not affected by the rootstock, whereas the fruit color and skin structure were found to be affected by the rootstocks. In the two mandarin cultivars evaluated, the rind thickness, juice content, total soluble solids (TSS), total acidity (TA) and TSS/TA ratio were similar when the rootstocks were compared. For Nova and Robinson mandarins, all of the rootstocks gave good fruit quality for the fresh fruit markets in the Eastern Mediterranean region. In conclusion, we propose Carrizo and Troyer citranges as an alternative to sour orange rootstocks.
