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Öğe Antioxidant responses of pumpkin genotypes exposed to drought stress conditions(ELSEVIER SCIENCE BV, 2018) Hamurcu, Mehmet; Avsaroglu, Zuhal Zeynep; Ustun, Canan; Omay, Humeyra; Gezgin, Sait; Hakki, Erdogan Esref; Pandey, Anamika[Abstract not Available]Öğe Assessment of genetic variability for grain nutrients from diverse regions: potential for wheat improvement(SPRINGER INTERNATIONAL PUBLISHING AG, 2016) Pandey, Anamika; Khan, Mohd Kamran; Hakki, Erdogan E.; Thomas, George; Hamurcu, Mehmet; Gezgin, Sait; Gizlenci, OzgeBackground: A total of 150 bread wheat genotypes representing 121 Indian and 29 Turkish origin were screened for nutrient concentrations and grain protein content. Elemental and grain protein composition were studied by Inductively Coupled Plasma-Atomic Emission Spectrophotometer and LECO analyser, respectively. The study was performed to determine the variability in nutrient concentrations present in the collected wheat genetic material from two countries. Results: Several fold variations among genotypes existed for almost all the elements. Three major components of principal component analysis (PCA) revealed 60.8% variation among the genotypes. Nutrient variables segregated into two groups, one group containing all the macroelements except sulphur; and another cluster containing proteins and all the microelements except Zn and Mn. Pearson correlation analysis and heat-map were in accordance with each other determining strong positive association between P-K, Mn-Zn, Mg-S and Cu-protein content. Also, PCA and hierarchical grouping divided all the Indian and Turkish genotypes in two main clusters. Conclusions: Nutritional profile differentiated the genotypes from two countries into separate groups. However, some of the varieties were closely associated and indicated the success of global wheat exchange programs. While most of the correlations were in agreement with the previous studies, non-association of zinc with grain protein content directed towards its control by some other genetic factors. Some of the experimental wheat varieties with promising nutrient content have been suggested for future wheat advancement programs. Results obtained will be supportive for breeders involved in wheat biofortification programs, food industries and people relying on whole grain wheat products.Öğe Bioactive Properties, Fatty Acid Composition and Mineral Contents of Grape Seed and Oils(SOUTH AFRICAN SOC ENOLOGY & VITICULTURE-SASEV, 2017) Al Juhaimi, Fahad Y.; Geçgel, U.; Gülcü, Mehmet; Hamurcu, Mehmet; Özcan, Mehmet MusaThe oil content of grape seed samples changed between 4.53% (Adakarasi) and 11.13% (Sauvignon blanc). While the linoleic acid contents of grape seed oils ranged from 47.34% (Sangiovese) to 72.91% (Cinsaut), the oleic acid contents varied between 13.35% (Cabernet Sauvignon) and 26.30% (Sangiovese) (p < 0.05). Also, the palmitic acid and stearic acid contents of grape seed oils ranged from 7.15% (Cinsaut) to 16.06% (Sangiovese) and from 2.43% (Narince) to 6.55% (Sangiovese) respectively (p < 0.05). The flavonoid contents of the seeds changed between 263.53 (mg CE/g) and 1 706.00 (mg CE/g) (Cabernet Sauvignon). Total phenols were found to be between 6 711:.14 (mg GA/g extract) (Sangiovese) and 8 818.69 (mg GA/g extract) (Narince). The linoleic contents of oils changed from between 47.34% (Sangiovese) and 72.91% (Cinsaut). The K contents of the grape seed samples changed between 4 347.80 mg/kg (Cabernet Sauvignon) and 9 492.60 mg/kg (Gamay) (p < 0.05). The Fe contents of seeds were found to be between 29.96 mg/kg (Narince) and 73.82 mg/kg (Sangiovese). As a result, the current study shows that grape seeds are useful for human nutrition due to their components.Öğe Biochemical effects of drought stress on two Turkish watermelon varieties are different and influenced by nitric oxide(ELSEVIER SCIENCE BV, 2016) Hamurcu, Mehmet; Hakki, Erdogan Esref; Demiral, Tijen; Gezgin, Sait[Abstract not Available]Öğe Bor Uygulamasının Şeker Pancarının Verim ve Kalitesine Etkisi(2001) Gezgin, Sait; Hamurcu, Mehmet; Apaydın, MustafaThis research was conducted to determine the effects of application methods and the levels of boron on the root yield and quality of sugar beet in the Konya-Altınekin plain. The experimental soil was sandy loam, poor in organic matter and rich in calcium carbonate. The soil was alkaline in reaction and sufficient in boron content (0.55 ppm). In this work, three different levels of boron in borax form (0, 0.3 and 0.6 kg B/da) were applied with five different methods (soil, leaf, seed, soil leaf, seed leaf). The results showed that the root yield and refined sugar yield of sugar beet with "soil leaf'', "soil'', and "leaf'' application methods of boron at the level of 0.3 kg/da over the controls were increased by 12.5%, 12.1%, 11.1% and 8.7%, 18.3%, 3.5%, respectively. On the other hand, increasing levels of boron applied with the same methods to the soil decreased the root and refined sugar yield. However, with the "seed'' and '"seed leaf'' application methods of boron at the levels of 0.3 and 0.6 kg/da, the root and refined sugar yield, as compared to controls, decreased by 17.8%, 12.5% and 23.7%, 0.35%, and 31.0%, 20.1% and 37.5%, 14.7%, respectively. While the root sugar content and refined sugar content varied depending on the application methods and levels of boron, they were generally lower than the controls in terms of the boron applications. The highest yield and the highest quality of sugar beet were obtained with the soil application method of boron at the level of 0.3 kg/da as borax material.Öğe Bor Uygulamasının Şeker Pancarının Verim ve Kalitesine Etkisi(TÜBİTAK, 2001) Gezgin, Sait; Hamurcu, Mehmet; Apaydın, MustafaThis research was conducted to determine the effects of application methods and the levels of boron on the root yield and quality of sugar beet in the Konya-Altinekin plain. The experimental soil was sandy loam, poor in organic matter and rich in calcium carbonate. The soil was alkaline in reaction and sufficient in boron content (0.55 ppm). In this work, three different levels of boron in borax form (0, 0.3 and 0.6 kg B/da) were applied with five different methods (soil, leaf, seed, soil + leaf, seed + leaf). The results showed that the root yield and refined sugar yield of sugar beet with "soil + leaf", "soil", and "leaf" application methods of boron at the level of 0.3 kg/da over the controls were increased by 12.5%, 12.1%, 11.1% and 8.7%, 18.3%, 3.5%, respectively. On the other hand, increasing levels of boron applied with the same methods to the soil decreased the root and refined sugar yield. However, with the "seed" and "seed + leaf" application methods of boron at the levels of 0.3 and 0.6 kg/da, the root and refined sugar yield, as compared to controls, decreased by 17.8%, 12.5% and 23.7%, 0.35%, and 31.0%, 20.1% and 37.5%, 14.7%, respectively. While the root sugar content and refined sugar content varied depending on the application methods and levels of boron, they were generally lower than the controls in terms of the boron applications. The highest yield and the highest quality of sugar beet were obtained with the soil application method of boron at the level of 0.3 kg/da as borax material.Öğe Boron Content of Cultivated Soils in Central-Southern Anatolia and Its Relationship with Soil Properties and Irrigation Water Quality(Kluwer Academic/Plenum Publ, 2002) Gezgin, Sait; Dursun, Nesim; Hamurcu, Mehmet; Harmankaya, Mustafa; Önder, Mustafa; Sade, Bayram; Topal, Ali; Soylu, Süleyman; Akgün, Necdet; Yorgancılar, Mustafa; Ceyhan, Ercan; Çiftçi, Nizamettin; Acar, Bilal; Gültekin, İrfan; Işık, Yusuf; Cevdet, Şeker; Babaoğlu, MehmetBoron toxicity may occur in semi-arid regions due to high levels of B in soils, in the ground water, in fertilisers or in irrigation water (U.S. Salinity Lab. Staff, 1954; Nable et al., 1997). Boron availability is affected by soil properties, principally pH, salt content, organic matter, lime, soil texture and exchangeable cations (Keren and Bingham, 1985; Sakal and Singh, 1995; Rahmatullah et al, 1999). According to Wilcox and Durum (1967), the minimum B concentration in irrigation water for a given crop species that does not reduce yield or lead to injury (symptoms) ranged from 0.3 to 1.0 mg B I¹ for sensitive crops, to 1.0 to 2.0 mgl¹ for semi-tolerant crops, and 2.0 to 4.0 mgl¹ for tolerant plant species.Öğe Boron deficiency responses on nutrients composition in brachypodium distachyon, a model for wheat(ELSEVIER SCIENCE BV, 2017) Pandey, Anamika; Khan, Mohd Kamran; Hamurcu, Mehmet; Gezgin, Sait; Hakki, Erdogan Esref[Abstract not Available]Öğe Boron enhances strength and alters mineral composition of bone in rabbits fed a high energy diet(ELSEVIER GMBH, URBAN & FISCHER VERLAG, 2013) Hakki, Sema S.; Dundar, Niyazi; Kayis, Seyit Ali; Hakki, Erdogan E.; Hamurcu, Mehmet; Kerimoglu, Ulku; Baspinar, NuriAn experiment was performed to determine whether boron had a beneficial effect on bone strength and composition in rabbits with apparent adiposity induced by a high energy diet. Sixty female New Zealand rabbits, aged 8 months, were randomly divided into five groups with the following treatments for seven months: control 1, fed alfalfa hay only (5.91 MJ/kg); control 2, high energy diet (11.76 MJ and 3.88 mg boron/kg); B10, high energy diet + 10 mg/kg body weight boron gavage/96 h; B30, high energy diet + 30 mg/kg body weight boron gavage/96 h; B50, high energy diet + 50 mg/kg body weight boron gavage/96 h. Bone boron concentrations were lowest in rabbits fed the high energy diet without boron supplementation, which suggested an inferior boron status. Femur maximum breaking force was highest in the B50 rabbits. Tibia compression strength was highest in B30 and B50 rabbits. All boron treatments significantly increased calcium and magnesium concentrations, and the B30 and B50 treatments increased the phosphorus concentration in tibia of rabbits fed the high energy diet. The B30 treatment significantly increased calcium, phosphorus and magnesium concentrations in femur of rabbits fed the high energy diet. Principal component analysis of the tibia minerals showed that the three boron treatments formed a separate cluster from controls. Discriminant analysis suggested that the concentrations of the minerals in femur could predict boron treatment. The findings indicate boron has beneficial effects on bone strength and mineral composition in rabbits fed a high energy diet. (C) 2012 Elsevier GmbH. All rights reserved.Öğe Determination of reliable house keeping gene(s) for qPCR in maize under different boron dosages(ELSEVIER SCIENCE BV, 2014) Can, Hasan; Hamurcu, Mehmet; Demiral, Tijen; Pandey, Anamika; Khan, Mohd Kamran; Kayis, Seyit Ali; Avsaroglu, Zuhal Zeynep[Abstract not Available]Öğe Dietary boron does not affect tooth strength, micro-hardness, and density, but affects tooth mineral composition and alveolar bone mineral density in rabbits fed a high-energy diet(ELSEVIER GMBH, 2015) Hakki, Sema S.; Malkoc, Siddik; Dundar, Niyazi; Kayis, Seyit Ali; Hakki, Erdogan E.; Hamurcu, Mehmet; Baspinar, NuriThe objective of this study was to determine whether dietary boron (B) affects the strength, density and mineral composition of teeth and mineral density of alveolar bone in rabbits with apparent obesity induced by a high-energy diet. Sixty female, 8-month-old, New Zealand rabbits were randomly assigned for 7 months into five groups as follows: (1) control 1, fed alfalfa hay only (5.91 MJ/kg and 57.5 mg B/kg); (2) control 2, high energy diet (11.76 MJ and 3.88 mg B/kg); (3) B10, high energy diet + 10 mg B gavage/kg body weight/96 h; (4) B30, high energy diet + 30 mg B gavage/kg body weight/96 h; (5) B50, high energy diet + 50 mg B gavage/kg body weight/96 h. Maxillary incisor teeth of the rabbits were evaluated for compression strength, mineral composition, and micro-hardness. Enamel, dentin, cementum and pulp tissue were examined histologically. Mineral densities of the incisor teeth and surrounding alveolar bone were determined by using micro-CT. When compared to controls, the different boron treatments did not significantly affect compression strength, and micro-hardness of the teeth, although the B content of teeth increased in a dose-dependent manner. Compared to control 1, B50 teeth had decreased phosphorus (P) concentrations. Histological examination revealed that teeth structure (shape and thickness of the enamel, dentin, cementum and pulp) was similar in the B-treated and control rabbits. Micro CT evaluation revealed greater alveolar bone mineral density in B10 and B30 groups than in controls. Alveolar bone density of the B50 group was not different than the controls. Although the B treatments did not affect teeth structure, strength, mineral density and micro-hardness, increasing B intake altered the mineral composition of teeth, and, in moderate amounts, had beneficial effects on surrounding alveolar bone. (C) 2014 Elsevier GmbH. All rights reserved.Öğe Effect of nitric oxide on the tolerance mechanism of bread wheat genotypes under drought stress(ELSEVIER SCIENCE BV, 2014) Hamurcu, Mehmet; Demiral, Tijen; Calik, Merve; Avsaroglu, Z. Zeynep; Celik, Ozgur; Hakki, Erdogan E.; Topal, Ali[Abstract not Available]Öğe Effect of nitric oxide on the tolerance mechanism of bread wheat genotypes under salinity stress(ELSEVIER SCIENCE BV, 2014) Hakki, Erdogan Esref; Hamurcu, Mehmet; Demiral, Tijen; Avsaroglu, Zuhal Zeynep; Calik, Merve; Zengin, Mehmet; Topal, Ali[Abstract not Available]Öğe Effect of Some Medicinal Tea Extracts on Some Oxidative Parameters of Sesame Oil(ASIAN JOURNAL OF CHEMISTRY, 2013) Hamurcu, Mehmet; Uslu, Nurhan; Al Juhaimi, Fahad Y.; Özcan, Mehmet MusaIn this study, the antioxidant activity of some medicinal tea extracts at different concentrations (0.3 and 0.5 %) on the oxidation parameters of sesame oil at 80 degrees C was determined. Butylated hydroxy anisole was used as positive control in experiment. All the extracts exhibited antioxidant activity compared to butylated hydroxy anisole upto 14 days. When antioxidant effect of extract concentrations were compared with butylated hydroxy anisole, the effect of 0.5 % extract concentration was more remarkable for sesame oil upto 14 days. All of seed extracts was effective at 80 degrees C in comparison with control. On the other hand, the peroxide and viscosity values during the experiment period increased. It concluded that tea extract could be used as an oxidative inhibitor agent in oil and oil products.Öğe Effects of application boron on yields, yield component and oil content of sunflower in boron-deficient calcareous soils(ACADEMIC JOURNALS, 2008) Ceyhan, Ercan; Onder, Mustafa; Ozturk, Ozden; Harmankaya, Mustafa; Hamurcu, Mehmet; Gezgin, SaitThe study was conducted to investigate the effects of five boron ( B) doses; 0, 2.5, 5.0, 7.5 and 10.0 kg B ha(-1) in B-deficient calcareous soils on yield and some yield components of four sunflower genotypes. Genotypes have shown variations with respect to their responses to B applications. AS-615 and Coban had the highest seed yield (3.75 and 3.23 t ha(-1), respectively) at 7.5 kg B ha(-1), whereas S-288 and TR-4098 yielded 4.17 and 3.28 t ha(-1), respectively, at 0 kg B ha(-1). Therefore, S-288 and TR-4098 can be indicator genotypes for B toxicity. The other genotypes appeared to have high sensitivity to B deficiency. For AS-615 and Coban, application at 7.5 kg B ha(-1) level was found to be sufficient for adequate grain yield, whereas further B levels might have detrimental effects on grain yield.Öğe Effects of chelating agents on the mineral content of root canal dentin(MOSBY-ELSEVIER, 2011) Cobankara, Funda Kont; Erdogan, Hilal; Hamurcu, MehmetObjective. The objective of this in vitro study was to assess the effect of several chelating agents on the mineral content of root dentin. Study design. Extracted human mandibular incisor roots were prepared and divided into groups according to the following irrigation protocols: 1) 17% ethylenediaminetetraacetic acid (EDTA); 2) 10% citric acid solution; 3) 18% etidronate; 4) 2.25% peracetic acid; 5) and deionized water (control). Dentin chips were obtained (Gates-Glidden nos. 3, 4, and 5). The levels of different minerals were analyzed with the use of inductively coupled plasma-atomic emission spectrometry (ICP-AES). Results. 1) Peracetic acid significantly decreased P, K, Mg, Na, and S levels compared with the other groups (P < .05). 2) S decreased by different levels in all of the chelating solutions (P < .05), and the greatest decrease was observed in peracetic acid. 3) Ca levels significantly decreased in peracetic acid, citric acid, and EDTA (P < .05). 4) Mn levels significantly decreased in the citric acid and peracetic acid groups (P < .05). 5) Na and Zn levels significantly decreased in the peracetic acid, citric acid, and etidronate groups (P < .05). Conclusions. The chelation agents can create different effects on mineral contents of root dentin, so it is important to know what effects each solution will have on root dentin before their clinical use. In addition, according to the results of this in vitro study, it might be recommended that peracetic acid, in particular, should be used with caution. (Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2011;112:e149-e154)Öğe The effects of toxic level boron treatments on the bio-chemical features of Puccinellia distans(CURRENT BIOLOGY LTD, 2011) Hamurcu, Mehmet; Demiral, Tijen; Gezgin, Sait; Caglar, Hayriye; Kizmaz, Veysi; Hakki, Erdogan Esref[Abstract not Available]Öğe Estimation of Indian and Turkish Hexaploid Wheat Population Structure Employing Molecular Markers(UNIV AGR SCI & VETERINARY MED CLUJ-NAPOCA, 2015) Pandey, Anamika; Khan, Mohd Kamran; Thomas, George; Hakki, Erdogan E.; Kayis, Seyit Ali; Hamurcu, Mehmet; Gezgin, SaitBread wheat (Triticum aestivum) is the most commonly grown crop due to its adaptation in a wide range of ecogeographical conditions and providing enhanced food assurance to the modern world. A diverse and rich collection is the foundation of each successful wheat improvement program. Therefore, major efforts are in progress worldwide to boost wheat production by broadening genetic diversity. Accepting this issue as a target, present study gives an overview of the major progress in the diversity and population evaluation of Indian and Turkish hexaploid wheat employing ISSR and RAPD primers. Various statistical analyses were employed for determining the hexaploid wheat population structure of India and Turkey. Results of dendrogram, scatterplots, Analysis of Molecular Variance (AMOVA) and population structure analysis were found in accordance with each other. All the experimental genotypes were clustered in two main groups, one group containing Indian varieties and another group containing both Indian and Turkish varieties reflecting the direct or indirect interbreeding among the populations of the two countries. Utilizing the genetic association of Indian and Turkish hexaploid wheat population, based on genetic distance estimated in the study, researchers worldwide may include Indian and Turkish hexaploid varieties in the wheat improvement programs and can evade the likelihood of selected germplasm becoming hereditarily consistent.Öğe Evaluation of puroindoline b as a house keeping gene in wild wheat species(CURRENT BIOLOGY LTD, 2011) Hakki, Erdogan Esref; Uygan, Songul; Hamurcu, Mehmet; Gezgin, Sait; Bozkurt, Buket Serife; Kayis, Seyit Ali[Abstract not Available]Öğe Evaluation of serine carboxypeptidase (PsCP) gene expression in Pisum arvense L. grown under different boron levels(ELSEVIER SCIENCE BV, 2012) Hakki, Erdogan Esref; Tamkoc, Ahmet; Hamurcu, Mehmet; Can, Nimet; Demiral, Tijen; Gezgin, Sait; Ozdemir, Canan[Abstract not Available]
