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Öğe Comparison of some local melon genotypes selected from Lake Van Basin with some commercial melon cultivars for some yield and quality related traits observed in field and high tunnel conditions(ACADEMIC JOURNALS, 2008) Erdinc, Ceknas; Turkmen, Onder; Sensoy, SuatThis study aimed to compare some local melon (Cucumis melo L.) genotypes selected from the Lake Van Basin (65 ER 02, 65 ER 04, and 13 TAT 05) with some commercial melon cultivars (Ananas, Makdimon F(1), and Rambo F(1)) for some yield and quality related traits observed in field and high tunnel conditions for two years. At the end of the study, it was determined that Makdimon F(1) produced the highest early and total yields (14.76 and 30.51 t ha(-1), respectively). While the locally selected melon genotype 65 ER 04 followed Makdimon F(1) for the early yield (11.43 t ha(-1)), the locally selected genotype 65 ER 02 followed Makdimon F1 for the total yield (22.49 t ha(-1)). The cultivars Rambo F(1) and Makdimon F(1) had higher soluble solid contents than the others.Öğe Determination of suitable sowing dates for spinach production in Van ecological condition(2011) Sensoy, Suat; Turkmen, Onder; Gorgun, YaseminVan koşullarında ıspanak yetiştiriciliği için uygun ekim zamanlarını belirlemek amacıyla iki yıl yürütülen bu çalışmada, sonbahar ekimi-ilkbahar hasadında üç ekim zamanı (Ekim ayı ortası, Kasım ayı başı ve ortası), ilkbahar ekimi-ilkbahar hasadında ise dört ekim zamanı (Mart ayı ortası, Nisan ayı başı, ortası ve sonu) uygulanmıştır. Birinci yıl Meridian ve Spinoza çeşitleri, ikinci yıl ise sadece Spinoza çeşidi kullanılmıştır. İlk yıl tohum ekim zamanları içerisinde en yüksek toplam verim, ortalama 4.00 t/da ile Ekim ayı ortası ekim zamanından elde edilmiştir. İlk yıl Spinoza çeşidinin ortalama verimi, Meridian çeşidinin ortalama veriminden 0.31 t/da daha yüksek bulunmuştur. İkinci yıl tohum ekim zamanları içerisinde en yüksek toplam verim, 4.57 t/da ile yine Ekim ayı ortası ekim zamanından elde edilmiştir. Her iki yılda da ilkbahar ekimlerinde sapa kalkma sorunuyla karşılaşılmıştır.Öğe Effects of irrigation interval and quantity on the yield and quality of confectionary pumpkin grown under field conditions(ELSEVIER SCIENCE BV, 2015) Yavuz, Duran; Seymen, Musa; Yavuz, Nurcan; Turkmen, OnderConfectionary pumpkin (Cucurbita pepo L) is one of the important snacks preferred by consumers in Turkey due to its higher nutrient contents. However, there is no comprehensive study on water management in pumpkin cultivation in many countries including Turkey. Therefore, a 2-year study (2013-2014) was conducted to determine the effects of different irrigation intervals (S) and irrigation levels (I) on the seed yield and yield components of drip-irrigated confectionary pumpkin under the Middle Anatolian climatic conditions in Konya, Turkey. The experimental design was made in randomized blocks, in a 3 x 5 factorial scheme, with three replications. Treatments consisted of three irrigation intervals (S-7: 7 days, S-14: 14 days, and S-21: 21 days) and five irrigation levels (I-100: 100% irrigation or full irrigation, I-75: 75% of full irrigation, I-50: 50% of full irrigation, I-25: 25% of full irrigation, and I-0: no irrigation). Seasonal plant water consumption or actual evapotranspiration (ETa) of irrigation treatments varied from 194.2 to 660.2 mm in 2013 and from 208.6 to 629.6 mm in 2014. The irrigation interval (S) and the irrigation level (I) significantly affected the seed yield and quality of pumpkin in both the years. Typically, no significant differences were found among S7I-(100), S7I75, and S14I100 treatments in both the years although S7I100 treatment produced the highest seed yield (1274 kg ha(-1)). In 2013, except for 1000-seed weight, interaction between the irrigation interval and the irrigation level significantly affected the seed yield, the number of fruits per plant, seed yield per fruit, and mean fruit weight; however, in 2014, the effects of S x interaction on the seed yield and yield components were not significant. Seed yields were significantly affected in a linear relationship by the amount of irrigation water and evapotranspiration in both the years. Seasonal yield response factors (k(y)) were 0.92 and 1.27 in 2013 and 2014, respectively. In conclusion, I-100 with a 7-day irrigation interval is recommended for pumpkin grown under field conditions to maximize the yield. However, if the irrigation water is scarce, it will be suitable to irrigate pumpkin with either 25% water deficit (7-day interval) or full irrigation (14-day interval) in semiarid conditions. (C) 2015 Elsevier B.V. All rights reserved.Öğe Evapotranspiration, crop coefficient and seed yield of drip irrigated pumpkin under semi-arid conditions(ELSEVIER SCIENCE BV, 2015) Yavuz, Duran; Yavuz, Nurcan; Seymen, Musa; Turkmen, OnderPumpkin (Cucurbita pepo L.) is one of the most important plants in Turkey. A 2-year experiment (2013-2014) was conducted in the Konya Plain of Turkey in order to investigate the response of confectionary pumpkin to irrigation intervals. The experiment was laid out in a randomized block design consisting of three irrigation intervals (I-7: 7-day, I-14: 14-day, I-21: 21-day) with three replications each. Actual evapotranspiration (ETa) of irrigation treatments varied from 521.2 to 660.2 mm in 2013 and from 493.6 to 629.6 mm in 2014. On an average, the ETa rate was 4.71 mm day(-1) under I-7 and declined by 8% and 21% under I-14 and I-21, respectively. Crop coefficients (K-c) varied similar to ETa among the different growing stages, i.e., from a mean of 0.56 at the initial stage to 0.95 at mid-season. The mean K-c was estimated to be 0.74 for the whole season. Irrigation intervals were found to significantly affect the seed yield and the quality of pumpkin in 2013 as well as 2014. No statistically significant differences (P <= 0.05) were found between the I-7 and I-14 treatments in both the years although the I-7 treatment was observed to produce the highest seed yield (1275 kg ha(-1)). Hence, in terms of water savings, the irrigation interval could be extended to 14 days without a significant decrease in the seed yield in case of arid and semi-arid areas such as the Konya Plain. (C) 2015 Elsevier B.V. All rights reserved.Öğe Genetic diversity and population structure of watermelon (Citrullus sp.) genotypes(SPRINGER HEIDELBERG, 2019) Pandey, Anamika; Khan, Mohd Kamran; Isik, Rabia; Turkmen, Onder; Acar, Ramazan; Seymen, Musa; Hakki, Erdogan E.Genetic polymorphism amid plant species is a crucial factor for plant improvement and maintaining their biodiversity. Evaluation of genetic diversity amongst plant species is significant to deal with the environmental stress conditions and their effective involvement in the breeding programs. Hence, in present study, an attempt has been made towards the genetic assessment of individual and bulked populations of 25 watermelon genotypes, belonging to Citroides (citron watermelon) and Lanatus (dessert watermelon) group from Konya, Thrace, Turkmenistan, Saudi Arabia and Turkey. The employed Random Amplified Polymorphic DNA (RAPD) and Inter-Simple Sequence Polymorphism (ISSR) marker systems provided 69.4 and 95.4% polymorphisms, respectively. Different clustering methods showed clear grouping of the genotypes based on the geographical origin and species. Citron genotypes from Turkmenistan stood apart from all the Turkish Lanatus genotypes. However, Saudi Arab Lanatus genotype grouped with native Turkish varieties indicating the genetic linkage. Among all the Turkmenistan Citron genotypes, Turkmenistan-11 was the most distinct form. Moreover, sufficient genetic variation was found between the commercial and native Lanatus genotypes of Turkey as well as Citron genotypes of Turkmenistan. Hence, it will be beneficial to include these genotypes in the future breeding programs to transfer disease-resistant alleles from Citron to Lanatus genotypes.Öğe Genetic variation within the purple carrot population grown in Eregli District in Turkey(TUBITAK SCIENTIFIC & TECHNICAL RESEARCH COUNCIL TURKEY, 2016) Ipek, Ahmet; Turkmen, Onder; Fidan, Sali; Ipek, Meryem; Karci, HarunAlthough the majority of carrots grown in Turkey and around the world are orange, the production of anthocyanin-containing purple carrots has recently increased in Turkey due to the extraction of anthocyanin from these carrots for use as a natural food colorant. Purple carrot production for this purpose is concentrated in Eregli District in Konya Province, and open-pollinated local purple carrot cultivars or landraces have been used for this production. Genetic variation within the local purple carrot populations in this region is of interest to plant breeders worldwide for the development of new purple carrot cultivars. Therefore, in this study, genetic variation within the purple carrot population grown in Eregli District was assessed using SSR markers. Purple carrot samples were collected by visiting 14 purple carrot growing fields in this region. A total of 20 SSR markers were used. Two SSR markers were monomorphic and the remaining 18 SSR markers amplified 106 SSR alleles. The number of polymorphic alleles per SSR marker ranged from 1 to 14. The polymorphism information content varied from 0.29 to 0.85, and the expected heterozygosity ranged from 0.32 to 0.87. STRUCTURE analysis indicated the presence of two distinct populations within the purple carrot genotypes used in carrot production in Eregli District. The genetic similarity of the genotypes ranged from 0.20 to 0.70. These results indicate that the genetic variation within these carrot populations in Eregli District is high, and the purple carrot populations in this region are valuable genetic resources for the development of new purple carrot cultivars.Öğe Oxidative stress responses in watermelon (Citrullus lanatus) as influenced by boron toxicity and drought(LITHUANIAN RESEARCH CENTRE AGRICULTURE & FORESTRY, 2015) Hamurcu, Mehmet; Demiral, Tijen; Hakki, Erdogan Esref; Turkmen, Onder; Gezgin, Sait; Bell, Richard W.This study aimed to investigate the effect of different boron (B) treatments on drought tolerance of watermelon plants. Drought tolerant Citrullus lanatus (Thunb.) Matsum. et Nakai genotype 'Kar 98' was grown in controlled greenhouse conditions hydroponically and exposed to drought stress by applying PEG 6000 (polyethylene glycol) in the presence of three boron dosages: 0.05, 0.25 and 1.25 mM. Growth parameters (fresh weight, dry weight and lengths of shoot and roots), leaf relative water content, boron accumulation, lipid peroxidation level and activities of superoxide dismutase (SOD), catalase (CAT) and glutathione reductase (GR) enzymes were determined as well as the accumulation of hydrogen peroxide (H2O2) and hydroxyl (center dot OH)-scavenging activity were assayed. Increasing dosages of boron alone caused more severe growth reduction than combined with PEG 6000-induced drought stress. Induced drought stress caused less accumulation of boron in leaves and roots. B concentration of 1.25 mM caused lipid peroxidation in a reactive oxygen species-independent manner and drought stress-induced lipid peroxidation was alleviated by increasing B dosages. Induced glutathione reductase activity under the combination of 1.25 mM B and PEG 6000-induced drought stress seemed an important physiological response in 'Kar 98' plants against multiple stresses.Öğe RADIOBIOLOGICAL EFFECTS OF GAMMA IRRADIATION ON WINTER SQUASH (CUCURBITA MAXIMA DUCH.) AND PUMPKIN (CUCURBITA MOSCHATA DUCH.) LINES IN M-0 AND M-1 GENERATIONS(PARLAR SCIENTIFIC PUBLICATIONS (P S P), 2018) Kurtar, Ertan Sait; Seymen, Musa; Turkmen, Onder; Kurt, DursunMutation breeding is one of the favorable techniques to the production of new cultivars and lines. But the determination of mutagen type and their appropriate doses the most important points in mutagenesis due to lethality in living organism. In the present study, the winter squash and pumpkin seeds were irradiated with a Co-60 source at five gamma ray doses (50, 100, 200, 300 and 400 Gy). Radiobiological effects of the gamma rays were investigated in root tip cells of germinated seeds in the M-0 (irradiated seeds) and M-1 generations of winter squash and pumpkin lines via mitotic index (MI), mitotic abnormalities (MA) (total abnormal cell, abnormality percentage, and chromosomal aberrations). Seeds irradiated with doses of up to 200 Gy exhibited similar MI and MA as non-irradiated control seeds. While cell division sharply interrupted and reduced, MA gradually increased at 300 Gy and 400 Gy gamma ray doses. M-0 showed the greater decrease in MI and increase in MA than M-1 generation.Öğe Responses of some different pepper (Capsicum annuum L.) genotypes to inoculation with two different arbuscular mycorrhizal fungi(ELSEVIER SCIENCE BV, 2007) Sensoy, Suat; Demir, Semra; Turkmen, Onder; Erdinc, Ceknas; Savur, Orcun BurakEight different pepper genotypes inoculated by two different arbuscular mycorrhizal fungi (AMF) [Glomus intraradices (Gi) and Gigaspora margarita (Gm)] in a growth chamber experiment under normal seedling growing conditions were evaluated for seedling traits, colonization and relative mycorrhizal dependency (RMD). In general, inoculated plants had greater dry weights compared to non-inoculated plants. Five cultivars responded positively to inoculation with AM fungi and three responded negatively. A great variation in mycorrhizal colonization dependency was observed among the pepper genotypes, with the N52 genotype showing the highest RMD and the Karaisali genotype the lowest. RMD and dry weights of pepper genotypes were inversely correlated. (C) 2007 Elsevier B.V. All rights reserved.Öğe Sewage sludge and farmyard manure ratios in growing media affect nutrient and heavy metal contents in cucumber(PARLAR SCIENTIFIC PUBLICATIONS (P S P), 2006) Sensoy, Suat; Turkmen, Onder; Cirka, Mustafa; Dursun, Atilla; Tufenkci, SerikThis study aimed to determine the effects of substituting sewage sludge for farmyard manure in seedling growing, media on the total dry weight, as well as nutrient and heavy metal contents of cucumber plants. Seedling growing, media consisted of 2:1:2 soil (S), pumice (P) and an organic fertilizer mixture [farmyard manure (FM) + sewage sludge (SS)]. Then, SS was progressively substituted for FM, at rates of 0%, 25 %, 50%, 75 %, and 100%. Treatments were placed in a growth chamber. No additional nutrients were applied. Dry weight, and Fe, Mn, B, Zn, Cu, Mo and Cd contents were found to increase with increases in SS ratios. Conversely, N, P, K, Ca, Mg and S contents increased with increases in FM ratios. Applications of 0:1 and 1:3 FM:SS ratios provided the best results based on dry weight of seedlings; however, when plant nutrient an heavy metal contents were taken into consideration, 1:1 and 3:1 FM:SS ratios were found to be preferable.Öğe TOXIC EFFECTS OF EXCESS Cu2+ AND Zn2+ ON GROWTH AND SOME ANTIOXIDANT ENZYMES OF TOMATO (Solanum lycopersicum L.)(PARLAR SCIENTIFIC PUBLICATIONS (P S P), 2010) Bozkurt, Mehmet Ali; Sensoy, Suat; Celik, Ismail; Turkmen, Onder; Bitiktas, AyseguelThe toxic effects of excess Cu2+ and Zn2+ doses on growth of tomato seedlings were studied in a pot experiment with the measurement of fresh and dry biomass of the plants. The toxic effects of both elements were evaluated by measuring copper and zinc accumulations, glutathione S transferase (GST) and superoxide dismutase (SOD) activities in tomato plants. The doses were 0, 150, 300, 450, and 600 mg kg(-1) of copper as well as 0, 250, 500, 750 and 1000 mg kg(-1) of zinc, and two separate pot experiments were conducted for these metals. The experimental results demonstrated that the excess Cu2+ and Zn2+ applications inhibited the growth of tomato seedlings and diminished their biomasses. The applications increased copper and zinc accumulations in the shoots and roots in comparison to control treatments. The accumulations were markedly higher in the roots than those in the shoots. The excessive Cu2+ amounts caused significant decreases in the GST and SOD activities of the roots. However, the SOD activities in the shoots significantly increased with excessive Cu2+ doses. The excessive Zn2+ applications significantly affected the GST activities in the shoots and the SOD activities in the roots. Both enzyme activities in the roots decreased with excessive Cu2+ and Zn2+ applications. This study shows that GST and SOD activities in tomatoes may be used as sensitive indicators of copper and zinc toxicity.
