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Variations in the essential oil composition of Matricaria chamomilla L. for a two-year trial were determined. The flowers of Matricaria chamomilla L. were collected from Ankara University gardens in the years of 2011 and 2012. Essential oils were prepared by the hydrodistillation of air-dried plants and analyzed by GC-MS methods. A total of 20 and 16 components were identified, representing over 96.6 % and 93.4 % of the total oil percentage for 2011 and 2012, respectively. The dominant constituents for 2011 were bisabolone oxide (47.6 %), bisabolol oxide A (27.4 %) and en-yn-dicycloether (5.6 %). As for 2012, the principal biologically active compound was bisabolol oxide A (75.4 %), followed by en-yn-dicycloether (4.4 %) and bisabolol oxide B (4.1 %).

ÖZETBu araştırma, bazı kışlık kolza çeşitlerinin çimlenme döneminde tuz stresine tepkilerinin belirlenmesi amacıyla laboratuar koşullarında yapılmıştır. Egc 7571, Elvis, Es Hydromel ve Triangle olmak üzere 4 kışlık kolza çeşidinin yer aldığı çalışma, Tesadüf Parselleri Deneme Deseni'ne göre 3 tekerrürlü olarak yürütülmüştür. Denemede çeşitlere 8 farklı NaCl dozu (0, 25, 50, 75, 100, 125, 150 ve 200 mM) uygulanmış ve ele alınan çeşitlerde çimlenme oranı, çimlenme süresi, kökçük uzunluğu ve sürgün uzunluğu incelenmiştir. Elde edilen sonuçlara göre, çimlenme oranı % 65.33-100.00, çimlenme süresi 3.75-8.71 gün, kökçük uzunluğu 0.50-12.81 cm ve sürgün uzunluğu 0.59-8.79 cm arasında değişmiş olup, NaCl dozları incelenen özellikler üzerine önemli oranda olumsuz etki yapmıştır. Çeşitler, çimlenme oranı bakımından tuz stresine 125 mM NaCl dozuna kadar dayanabilmiş, bu düzeyden sonra çimlenme oranında önemli düşüşler görülmüştür. Diğer özelliklerde ise çeşitler genel olarak tuz stresine 100 mM NaCl dozuna kadar tolerans gösterebilmiş, bu noktadan sonra keskin düşüşler görülmüştür. İncelenen tüm özelliklerde, Egc 7571 çeşidi artan tuz dozlarından daha az etkilenirken, Elvis en fazla etkilenen çeşit olarak dikkati çekmiştir. ABSTRACTThis study was carried out in laboratory conditions to determine responses of some winter-canola cultivars to salt stress at germination period. The laboratory experiment with four winter canola cultivars; i.e. Egc 7571, Elvis, Es Hydromel and Triangle, was set up as completely randomized design with 3 replications. In the experiment, eight different NaCl

Oilseeds are one of the most valuable crops in Turkey's agriculture and economy as they are the most important source of vegetable oil, feed for livestock and, as of recently, biodiesel feedstock. At the present time, Turkey cannot even meet its own demand for oilseeds, and this problem stems mainly from a lack of planning in the production phase. At present, more than half of the country's need for oil is s met by imports and the import value of crude vegetable oil and oilseed crops is the second largest figure in the country's total exchange expenditures, trailing only petroleum products. In the last two decades, although the total oilseeds production has increased nearly 20%, the area planted to oilseeds has gone down by 12%. Among oilseeds, soybean has been hit the hardest, as the area planted to the crop and its production decreased by 80% and 68%, respectively. In the Black Sea region, including the Samsun and Ordu provinces, which used to be the country's largest soybean producer, soybean areas and production have also decreased drastically. The soybean acreage and production in the Samsun province have dropped by 60% and 18%, respectively. Worse still, in the Ordu province, where the country's first soybean oil factory was set up in 1965, soybean is not grown anymore. Farmers in the two provinces have started gravitating mostly towards hazelnut production, resulting in a nine-fold and twofold increase in the Samsun and Ordu provinces, respectively. Sunflower, the major oilseed crop of Turkey, currently provides approximately 50% of the country's total oilseed supply. Over the years, sunflower production in Turkey has followed an ever-fluctuating course. The situation is even worse in the Central Black Sea region including Samsun, Çorum and Amasya provinces, where sunflower area have decreased by 54%, 53% and 72%, respectively. On the other hand, the self-sufficiency ratio in sunflower consumption has decreased from 70% in 2000 to 38% in 2007. The excessive decrease in the self-sufficiency ratio should be regarded as an alarm bell for sunflower and must be taken seriously without delay if the country does not want to play out the same tragic scenario as in the case of soybean. It should always be kept in mind that strategic planning for the future in most cases depends on past history.