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Öğe Antioxidant Activity and Total Phenolic Content of Some Turkish Pomegranate Varieties(Int Soc Horticultural Science, 2009) Hepaksoy, S.; Erogul, D.; Sen, F.; Aksoy, U.; Ozguven, AI; Fideghelli, C; Mendi, YYThe pomegranate (Punica granatum L.) is one of the oldest known edible fruits. It has been considered a fruit tree species of minor importance, but the increased consumer demand for exotic fruits as well as for high nutritional quality foods opens new perspectives for consumption of this traditional species. The fruit is consumed fresh or can be processed into juice, syrup, jams or a type of wine. Pomegranate juice has become more popular because of the attribution of important biological actins. Thus, the antioxidant and antitumoral activity of pomegranate bark tannins and the antioxidant activity of fermented pomegranate juice have been reported. In this study, antioxidant activity and total phenolic content of some pomegranate varieties was determined.Öğe The effects of irrigation on leaf nutrient content in pomegranate 'Izmir 1513'(Int Soc Horticultural Science, 2016) Hepaksoy, S.; Bahaulddin, A.; Kurttas, Y. S. Kukul; Milatovic, D; Milivojevic, J; Nikolic, DPomegranate (Punica granatum L.) is a characteristic species of the Mediterranean area whose use and culture have longstanding tradition. It is well adapted to the growth conditions in Turkey and Mediterranean countries and is frequently found growing in wild or semi wild conditions. Pomegranate is known as a drought tolerant crop, but regular irrigation is mandatory in commercial production. Water quantity applied and optimal irrigation regime depends on some factors as soil type, tree size, physiological phase of tree and potential evaporation. Irrigation frequency and quantity affect nutrient uptake of the trees. In this study leaf nutrient content of 'Izmir 1513' pomegranate was determined under different irrigation water quantities during two consecutive years. Three water quantities (0, 50 and 100% of estimated evapotranspiration by considering class A pan evaporation) were applied to trees by drip irrigation. Leaf content of potassium, iron, and copper was not affected, but nitrogen, calcium and magnesium increased with higher quantity of irrigation water in the first year. In the second year, nitrogen, phosphorus, calcium, magnesium and manganese were affected by the irrigation levels.Öğe Effects of shading nets on sunburn and quality of 'Granny Smith' apple fruits(Int Soc Horticultural Science, 2016) Dayioglu, A.; Hepaksoy, S.; Milatovic, D; Milivojevic, J; Nikolic, DSunburn causes some damage to apple orchards and it results from heat stress to the fruit leading to injury of the affected cells. A net shield is a good option for protection of apple trees against damage by hail, strong wind, and birds. Also, it reduces sunburn and russeting of fruits, provides better color and skin uniformity. This study was carried out to determine the effects of two different light transmission shade nets (black and white) on 'Granny Smith' apple fruits sunburn and quality. The experiment was conducted in commercial apple orchard in Denizli, west part of Turkey during two consecutive years (2012-2013). Fruit sunburn ratio was 24% under open sky (without net) condition. Black or white shading nets reduced sunburn of fruits without negative effects on fruit quality and maturation.Öğe Essential oil composition of Laurus nobilis L.(International Society for Horticultural Science, 2020) Hepaksoy, S.; Boza, A.Bay laurel (Laurus nobilis L.) belongs to the family Lauraceae, which comprises numerous aromatic and medicinal plants. Laurus nobilis L. native to Mediterranean regions is also known as sweet bay, bay laurel, Grecian laurel, true bay and bay. Bay laurel has been used as a spice since antiquity, primarily because of its oil content. In Turkey, Laurus nobilis L. grows in the Marmara, Aegean and Mediterranean regions. In this study, essential oil content of trees in Urla – İzmir which is west part of Turkey was determined. Two years old leaf was taken in June, July, August and September from 50 different genotypes. After collection samples were dried at room temperature and each sample was subjected to hydro distillation by Clevenger apparatus and analyzed by gas chromatography. Seventy-six compounds were found in the leaf and 33 compounds of them were found all genotypes. There were no significant differences among genotypes observed. The major component was found to be 1,8-Cineole. The highest amount of this component was found in September. © 2020 International Society for Horticultural Science. All rights reserved.Öğe Essential oil composition of Laurus nobilis L.(Int Soc Horticultural Science, 2020) Hepaksoy, S.; Boza, A.Bay laurel (Laurus nobilis L.) belongs to the family Lauraceae, which comprises numerous aromatic and medicinal plants. Laurus nobilis L. native to Mediterranean regions is also known as sweet bay, bay laurel, Grecian laurel, true bay and bay. Bay laurel has been used as a spice since antiquity, primarily because of its oil content. In Turkey, Laurus nobilis L. grows in the Marmara, Aegean and Mediterranean regions. In this study, essential oil content of trees in Urla - Izmir which is west part of Turkey was determined. Two years old leaf was taken in June, July, August and September from 50 different genotypes. After collection samples were dried at room temperature and each sample was subjected to hydro distillation by Clevenger apparatus and analyzed by gas chromatography. Seventy-six compounds were found in the leaf and 33 compounds of them were found all genotypes. There were no significant differences among genotypes observed. The major component was found to be 1,8-Cineole. The highest amount of this component was found in September.Öğe IMPACT OF CLIMATIC CHANGES ON PLANT PRODUCTION IN KUCUK MENDERES BASIN OF EGE REGION/TURKEY(Scibulcom Ltd, 2018) Hepaksoy, S.; Duman, I.; Tatar, O.; Kurucu, Y.The Kucuk Menderes Basin is important for plant production and today, many temperate fruit species, vegetables and field crops are cultivated commercially in this region. Due to the increase in temperature and the decrease in rainfall, it is likely that the species grown will change. In this study, downscaling models based on artificial neural networks have been established for the average and maximum temperature total precipitation projections of meteorological stations in the basin. These models indicate the possibility that changes in the pattern of the crops that are being cultivated today are compulsory. Some parts of the basin, in which certain vegetables and field crops may have problems growing, will be able to grow these crops without any problems. Conversely, it will not be possible to grow a number of the fruit species that are currently in production.Öğe In Vitro Propagation of Ficus carica cv. Sarilop Clone Selected for Its High Performance(International Society Horticultural Science, 2008) Hepaksoy, S.; Aksoy, U.; Leitao, J; Neves, MA'Sarilop' (= Calimyrna) is accepted as a standard fig cultivar for drying due to its high fruit quality all over the world. In Turkish dried rig production that depends fully on cv. Sarilop, the policy is to reduce the percentage of defected fruits rather than extending the acreage. To fulfill this aim, a clonal selection was carried out, and some promising clones were selected in terms of fruit yield and quality. Thereafter, Clone 37 was selected to be the best among the promising clones. On the other hand, all of the cv. Sarilop trees were found to be infected with rig mosaic virus. Thus, propagation of selected clones by apical meristem or shoot tip culture for virus-free and/or mass propagation purposes became a must. This experiment is designed to determine the most suitable conditions and media for propagating cv. Sarilop Clone 37 through tissue culture. Clone 37 displayed a high performance. As the multiplication medium, the Murashige Skoog (MS) medium containing 1 mg/L IBA, 5 mg/L BA, 1 mg/L GA(3) and 89 ml/L PG were the best, whereas, MS medium complemented with 1.2 and 2.5 mu M IBA or NAA were better in respect to rooting. Peat followed by volcanic tuff gave the best performance for acclimatization to outdoor conditions. The survival rates were lower in Perlite and in sand, soil and cow manure mixture (1:1:1).Öğe Leaf Water Potential of Pomegranate (Punica granatum L.) under Different Irrigation Levels(Int Soc Horticultural Science, 2009) Hepaksoy, S.; Kukul, Y. S.; Engin, H.; Erogul, D.; Aksehirli, M.; Ozguven, AI; Fideghelli, C; Mendi, YYPomegranate is a characteristic species of the Mediterranean area. The cultivation of the pomegranate is mainly confined to the tropics and subtropics and it grows well in arid and semi-arid climates. It is now widely cultivated in Mediterranean, in tropical and subtropical areas. In Turkey, pomegranate is among the under-utilised fruit species. The Mediterranean, Aegean and South-east regions have more suitable climates for pomegranate growing. Although pomegranate is generally grown as a low input crop, varietal differences and some physiological disorders exert a major impact on fruit quality and marketability. Irrigation of pomegranate trees is very important. Fruit splitting and cracking can occurr, unless they are regularly irrigated. Excess watering or excessive rain during the maturation period may cause similar damage to the fruits. The aim of this research was to determine the leaf water potential (LWP) of pomegranate trees under three iirrigation levels.Öğe Overall assessment of the molecular analysis of olives in Turkey(Centenary University, 2019) Topakli, F.; Hepaksoy, S.Olive (Olea europaea L.) is one of the oldest species cultivated in the Mediterranean basin. It has an important place in terms of human health with its fruit, oil and other by-products and it has been serving humanity with its economic importance for thousands of years. Cultured olive belongs to the genus Olea of the family Oleaceae and there are about 90 cultivars in Turkey. Other transitional forms between these varieties and wild olives forms constitute a wide genetic diversity. Interfertile olives and a lot of varieties have high levels of heterozygosity. While this makes it more difficult to verify varieties, the situation becomes more complicated when combined with cross pollinization. The phylogenetic relationships of Turkish varieties and these different forms have not been fully elucidated due to many reasons such as incorrect labeling, synonyms, local naming. Until the 1990s, varieties were identified with their morphological characteristics and separated from each other. This problem has begun to be resolved to some extent with the development of technology and the use of biotechnological methods in agriculture. Many researchers have been conducted in the world and in our country on identify cultivars and determine the relationships between cultivars with molecular markers. However there are some contrasts between the results of studies. The aim of this article is evaluate together the results of previous studies on Turkish varieties and to present the current situation for future studies. © 2019, Centenary University. All rights reserved.Öğe Propagation of mahaleb by tissue culture(Int Soc Horticultural Science, 2020) Zainal, A. A.; Hepaksoy, S.The aim of this research was to facilitate propagation of some Turkish mahaleb genotypes by in vitro techniques. Shoot tips of annual shoots were used as explants. Murashige and Skoog (MS) medium was supplemented with different plant growth regulators. Shoot length, number of leaves and multiplication rate were recorded every 30 days. In multiplication stages, ten different media were tested. The optimum multiplication medium was obtained on MS medium supplemented with 1 mg L-1 BAP + 0.1 mg L-1 IBA + 0.17 mg L-1 GA(3). Shoots rooted in MS medium supplemented with 0.3 mg L-l NAA. Rooted in vitro shoots were transferred into pots filled with peat for acclimatization.Öğe Propagation of mahaleb by tissue culture(International Society for Horticultural Science, 2020) Zainal, A.A.; Hepaksoy, S.The aim of this research was to facilitate propagation of some Turkish mahaleb genotypes by in vitro techniques. Shoot tips of annual shoots were used as explants. Murashige and Skoog (MS) medium was supplemented with different plant growth regulators. Shoot length, number of leaves and multiplication rate were recorded every 30 days. In multiplication stages, ten different media were tested. The optimum multiplication medium was obtained on MS medium supplemented with 1 mg L-1BAP + 0.1 mg L-1IBA + 0.17 mg L-1GA3. Shoots rooted in MS medium supplemented with 0.3 mg L-1NAA. Rooted in vitro shoots were transferred into pots filled with peat for acclimatization. © 2020 International Society for Horticultural Science. All rights reserved.
