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    Adaptation of endemic mediterranean Sternbergia candida Mathew Et T. Baytop in the continental climate of central anatolia
    (Elsevier, 2009) Gurbuz, Bilal; Arslan, Neset; Khawar, Khalid Mahmood; Ipek, Arif; Sarihan, Ercument Osman; Ozcan, Sebahattin; Parmaksiz, Iskender
    Sternbergia candida is an important endemic bulbous plant with beautiful white flowers. It grows on the rock slopes of Baba mountains under Lebanon Cedars in the Mugla province of Turkey with Mediterranean climate. The plant is vulnerable and endangered due to illegal collection for local and foreign flower industry. Fast developing tourism industry and rapid urbanization has also shown negative implications on its population. The study reports three years successful adaptation results of S. candida in the continental climate of Ankara in the Central Anatolia. Four groups of bulbs based on diameter (>2.45, 2.15-2.44, 1.85-2.14 and <1.84 cm) were collected from its natural habitat during March, April and May 1998 and were evaluated for frequency (%) of emergence, mean number of leaves per plant, mean plant height, frequency (%) of flowering, frequency (%) of fruit setting. mean number of bulbs per plant, and mean diameter (cm) of regenerated bulbs. All categories of bulbs could be multiplied and adapted successfully with variable frequency of fruit setting. However, the highest fruit set was recorded from 2.15-2.44 cm April collected bulbs. This indicated that the bulb diameter and collection time had clear implications on multiplication, propagation and adaptation of the plant. (C) 2009 Elsevier B.V. All rights reserved.
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    Effects of Different Bulb Cutting Methods on Some Characteristics of Fritillaria persica L.
    (Ankara Univ, Fac Agr, 2008) Arslan, Neset; Sarihan, Ercuement O.; Ipek, Arif
    Fritillaria persica L., which is a species produced and exported from Turkey, can be propagated both vegetative and generatively. Using generative production, it needs four to six years to reach for the required bulb size for export. Vegetative production period is shorter than the generative one. This study was carried out in the experimental fields of the University of Ankara, Faculty of Agriculture, Department of Field Crops, during 2003-2005. Bulbs of Fritillaria persica L. were used as plant materials in this study. The cutting methods used in this study was as follows: a) bulbs were not cut as control, b) basal cuttage carried out by cutting vertically from the base to center of the bulbs, c) bulbs were cut vertically from the top part to the center d) The basal cuttage was carried out by deep incision around the base, and e) the basal parts of bulbs were carved by knife conically. The experiment was established as a randomized complete block design with three replications. Bulbs were planted with 30 cm row spacing and 30 cm intra-row spacing. Plots were constituted as 3 rows with 7 bulbs each. Plant height (cm), flowering percentage (%), flower cluster length, fruit rate, number of fruits, number of harvested bulbs per planted bulb and bulb yield per decare were determined in this study. Our results suggested that different cutting methods significantly affected numbers of harvested bulbs per plant and bulb yield per decare.
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    Effects of diurnal and ontogenetic variability on essential oil composition of oregano (Origanum vulgare var. hirtum)
    (Asian Journal Of Chemistry, 2008) Gumuscu, Ahmet; Ipek, Arif; Sarihan, Ercument O.; Gurbuz, Bilal; Kaya, M. Demir; Arslan, Neset
    This study was carried out to determine the effects of diurnal and stage of harvesting on the essential oil components of oregano (Origanum vulgare var. hirtum). The samples were collected at three different stages of flowering (before and after flowering) and six different times (06:00, 09:00, 12:00, 15:00, 18:00 and 21:00 h) with drying under shade or sunshine. Essential oil was obtained by hydrodistillation method and analyzed with GC-MS. Results showed that the main compound of O. vulgare var. hirtum was thymol. The harvest stage affected the compounds of essential oil such that p-cymene increased at full flowering while gamma-terpinene decreased. Drying methods and harvesting time showed a minor effect on volatile compounds. The highest variation in composition of essential oil in relation to harvest stage was determined in p-cymene and gamma-terpinene. It was concluded that the harvest stage along with drying under shade should be firstly considered.
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    Evaluation of selected poppy (Papaver somniferum L.) lines by their morphine and other alkaloids contents
    (Springer, 2008) Guemuescue, Ahmet; Arslan, Neset; Sarihan, Ercument Osman
    The alkaloid analysis was performed in the laboratory of the alkaloid factory located at Bolvadin province of Turkey in 2000 on selected 99 poppy lines, which were selected with respect to their morphological and agronomic characteristics from around 1,000 poppy lines provided by Agriculture faculty, Ankara University. Our results showed that the ratio of the alkaloids, morphine, thebaine, codeine, papaverine and noscapine ranged from 0.110 to 1.140%, 0.005 to 0.134%, 0.005 to 0.27%, 0.001 to 0.440% and 0.006 to 0.418%, respectively, in the selected 99 poppy lines. According to their alkaloid content, 15 lines had significantly higher morphine, three lines had higher noscapine, and one line had higher papaverine levels.