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    Determination of Germination Threshold Value of Chickpea Varieties with GGE Biplot Method Under Different Irrigation Water Salinity Conditions
    (Ankara Univ, Fac Agr, 2022) Tas, Ismail; Tutenocakli, Tulay; Coskun, Yalcin; Akcura, Mevlut
    For sustainable agricultural production, besides drought, plant resistance to irrigation water and soil salinity should be investigated. Researchers mostly focused on salinity and drought resistance of common species such as wheat, barley, maize, etc. However, the number of studies on chickpea with various uses is quite limited. In the present study, 11 chickpea varieties (Aksu, Arda, Hasanbey, Azkan, Cagatay, Aslanbey, Inci, Seckin, 21C, 42C and EN1867) were subjected to germination tests under different levels of irrigation water salinity (ECi) conditions to identify irrigation water salinity resistant and sensitive varieties. In germination tests, besides control treatment (0 dS/m), five different EC levels (6, 8 10, 12 and 16 dS/m) were used in germination solution. The sodium absorption ratio of saline waters was adjusted to be below 3. GGE biplot method was used for visual assessment of genotype response to saline irrigation waters. The threshold salinity value for germination was identified as 12 dS/m based on germination ratios and seedling dry weights, 8 dS/m based on seedling stem lengths and 10 dS/m based on seedling root lengths. Based on germination ratios and seedling dry weights, Azkan cultivar was identified as the most resistant and Cagatay cultivar was identified as the most sensitive cultivar to irrigation water salinity.
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    Does Natural Boron Application Increase Yarrow ( Achillea millefolium L.) Essential Oil Yield?
    (Jihad Daneshgahi, 2024) Karayel, Hasan Basri; Coskun, Yalcin; Argui, Hayfa
    This study investigated the impact of different boron doses (Boron-free, 80 L/ha, and 10 L/ha) on the yield and components of yarrow essential oil. The study utilized a randomized block trial design with three replicated field studies conducted between 2017 and 2018 in the K & uuml;tahyaGediz region of T & uuml;rkiye. The essential oil of this species was extracted using the hydro-distillation procedure. The essential oil ratios were 0.66-0.59% in the plants grown without boron, 0.82-0.81% in the plants grown with the 80 L/ha boron dose, and 0.70-0.69% in the plants grown with the 10 L/ha boron dose, based on examinations conducted on dry flowers in 2017-2018. Employing GC-MS/FID analysis, 20 components of the yarrow essential oils were identified. 19 components were detected in the boron-free dose, while 18 were found in the dose 80 L/ha and 10 L/ha of boron. The main components of the essential oil (EO) based on boron doses were determined as follows: alpha-pinene at 16.25%, 20.50%, and 17.38%; Chrysanthenone at 16.54%, 19.29%, and 20.05%; cis-chrysanthenyl acetate at 11.33%, 15.26%, and 13.29%; and Filifolone at 10.00%, 11.46%, and 11.30%. The ratios of yarrow essential oil and its constituents were influenced positively by the applications of 80 L/ha and 10 L/ha natural boron supplementation. We can recommend applying 80 L/ha boron to the yarrow plant grown for its essential oil to obtain a high essential oil yield.
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    Does Natural Boron Application Increase Yarrow (Achillea millefolium L.) Essential Oil Yield?
    (Iranian Institute of Research and Development in Chemical Industries, 2024) Basri Karayel, Hasan; Coskun, Yalcin; Argui, Hayfa
    This study investigated the impact of different boron doses (Boron-free, 80 L/ha, and 10 L/ha) on the yield and components of yarrow essential oil. The study utilized a randomized block trial design with three replicated field studies conducted between 2017 and 2018 in the Kütahya-Gediz region of Türkiye. The essential oil of this species was extracted using the hydro-distillation procedure. The essential oil ratios were 0.66-0.59% in the plants grown without boron, 0.82-0.81% in the plants grown with the 80 L/ha boron dose, and 0.70-0.69% in the plants grown with the 10 L/ha boron dose, based on examinations conducted on dry flowers in 2017-2018. Employing GC-MS/FID analysis, 20 components of the yarrow essential oils were identified. 19 components were detected in the boron-free dose, while 18 were found in the dose 80 L/ha and 10 L/ha of boron. The main components of the essential oil (EO) based on boron doses were determined as follows: ?-pinene at 16.25%, 20.50%, and 17.38%; Chrysanthenone at 16.54%, 19.29%, and 20.05%; cis-chrysanthenyl acetate at 11.33%, 15.26%, and 13.29%; and Filifolone at 10.00%, 11.46%, and 11.30%. The ratios of yarrow essential oil and its constituents were influenced positively by the applications of 80 L/ha and 10 L/ha natural boron supplementation. We can recommend applying 80 L/ha boron to the yarrow plant grown for its essential oil to obtain a high essential oil yield. © 2024, Iranian Institute of Research and Development in Chemical Industries. All rights reserved.
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    EVALUATION OF DIFFERENT SIGMOIDAL GROWTH MODELS AND CLIMATE PARAMETERS FOR DRY MATTER ACCUMULATION OF OAT
    (Serbian Genetics Soc, 2018) Coskun, Yalcin
    The monitoring of the biological growth of field crops is important for planning and scheduling agricultural applications. In order to assess biological growth pattern and, dry matter accumulation of Yeniceri oat variety were obtained in canakkale conditions in 2012-2013 and 2013-2014 growing seasons with continuous plant samplings from seedling emergence until seed maturation. Gompertz, Logistic, Logistic Power, Weibull, and Ratkowsky sigmoidal growth models are fitted to actual growth data and their predictions were compared. Results suggested that all sigmoidal growth models successfully explained oat dry matter accumulation a high R-2 values (over 99%) and low mean square errors, Weibull model fitted lower than others for first year with an R-2 value under 99%. Dry matter accumulation was also investigated as a result of average temperature and precipitation with stepwise regression. Results indicated that average weather temperature has a similar pattern across both growing seasons and has a major influence on dry matter accumulation.
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    EVALUATION OF DRY MATTER ACCUMULATION IN TRITICALE BY DIFFERENT SIGMOIDAL GROWTH MODELS IN WEST ANATOLIA OF TURKEY
    (Serbian Genetics Soc, 2018) Hocaoglu, Onur; Coskun, Yalcin
    Monitoring biological growth of field crops is important for planning and timing agricultural practices. In order to assess biological growth pattern of dry matter accumulation in triticale Egeyildizi triticale variety were grown in canakkale conditions in 2012-2013 and 2013-2014 growing seasons with continuous plant samplings from seedling emergence until seed maturation. Gompertz, Logistic, Logistic Power and Richards growth models are fitted to actual growth data and their predictions were compared. Results suggested that all sigmoidal growth models successfully explained triticale dry matter accumulation over 98 % R-2 values and low mean square errors, Richards model fitted best for both years with an R-2 value over 99 %. Dry matter accumulation were also investigated as a result of average temperature, precipitation, growth degree days and cumulative growth degree days with stepwise regression. Rresults indicated that average weather temperature had a similar pattern across both growing seasons and had a major influence on dry matter accumulation. Since Richards sigmoidal growth model may be adequately described growth pattern of triticale by generally high R-2 with lower Mean Square Error (MSE) values.
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    Fast selection opportunity of salt tolerant guar bean genotypes with GGE biplot method
    (Taylor & Francis Ltd, 2023) Tas, Ismail; Akcura, Mevlut; Coskun, Yalcin; Tutenocakli, Tulay
    In this study, 81 guar bean genotypes developed in Turkey were tested in the germination stage under saline conditions, and Genotype-Genotype-Environment (GGE) biplot method was used to identify salt tolerant and sensitive genotypes. In the study, irrigation waters with six different Electrical Conductivity (ECi = 0.5 [control], 6, 8, 10, 12, and 15 dS m(-1)) levels were used. Split-plots experimental design was used in the study, and it was carried out in a laboratory environment with three replications. A dry-weight-based stress tolerance index (STI) was calculated for each ECi level. Salt treatments were considered as environments in GGE biplot analysis conducted for genotype selection based on salt concentrations. Seedling dry weight of some genotypes significantly decreased after 8 dS m(-1) level and such decreases were more remarkable in the other genotypes after 12 dS m(-1) level. It was concluded that ECi = 8 dS m(-1) level could be used for selection of genotypes with moderate salt tolerance and high adaptation capacity and ECi = 12 dS m(-1) level could be used for selection of genotypes with a high salt tolerance and special adaptation capacity. It was also concluded that the GGE biplot method quite facilitated the selection of genotypes tolerant to abiotic stressors, especially to salt stress.
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    Preparation and Characterization of Poly(lactic acid)-Based Poly(ethylene glycol) and Daphne Essential Oil-Loaded Smart Nanofibers for Thermal Protection
    (Amer Chemical Soc, 2024) GungorErtugral, Tugba; Coskun, Yalcin; Oral, Ayhan; Ulusoy, Seyhan
    Phase change material (PCM) stores latent heat energy, and poly(ethylene glycol) (Mw: 4000) (PEG 4000) is also a solid-liquid PCM. PEG and poly(lactic acid) (PLA) polymers are biodegradable. Essential oils are known as plant extracts with antimicrobial properties. In this study, daphne essential oil (DEO) obtained by the distillation method and PLA/PEG/DEO composite nanofibers were prepared by the electrospinning method with PLA, PEG 4000, and daphne (Laurus nobilis L.) essential oil in certain ratios (100/100/20, 100/120/20, and 100/150/20). DEO showed an antibacterial effect against Staphylococcus aureus and Escherichia coli bacteria. Thermal behaviors of the nanofibers were characterized by differential scanning calorimetry and thermogravimetric analysis. Morphological features were observed by scanning electronic microscopy (SEM), crystal behavior by X-ray diffraction analysis, and molecular structures were examined by Fourier transform infrared spectroscopy. Essential oil composition was determined by GC-MS. The thermal decomposition temperatures of the nanofibers were found between 250 and 276 degrees C, and the latent heat storage energies of nanofibers were 69.06, 86.76, and 96.39 J g(-1) at temperatures 59.0 and 54.37 degrees C. High PCM added fiber was observed as 182 nm diameter with 3.264 mu m diameter spheres. The produced nanofiber matrix has the potential to be used in applications such as medicine, textile, and hot food logistics.
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    RESPONS OF WHEAT SPECIES TO IRRIGATION WATER SALINITY
    (Serbian Genetics Soc, 2017) Coskun, Yalcin; Tas, Ismail
    This study was conducted to investigate the effects of different irrigation water salinity level on chromosomes and shoots of wheat with three different ploidy level (diploid, tetraploid and hexaploid). Greenhouse experiment revealed that irrigation water salinity level had significant effects on shoot dry weight, root dry weight, shoot length and root length (P < 0.05). The effects of ploidy level and cultivar shoot dry weight and root dry weight were also found to be significant (P < 0.05), but the effects on shoot length and root length were not significant (P > 0.05). Negative effects of salinity on shoot and root were started at 8 dS m(-1). Also hexaploid wheat was more tolerant then tetraploid and diploid wheat to salinity. It was not determined that possible effects of irrigation water salinity to structure of chromosomes with current equipment and methods. Cell divisions were normal, but decreasing cell division rates were observed with increasing irrigation water salinity levels.
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    THE EFFECTS OF IRRIGATION WATER SALINITY ON THE SEED GERMINATION AND SEEDLING GROWTH OF RICE
    (Serbian Genetics Soc, 2022) Bayindir, Fikri; Coskun, Yalcin
    To determine the effects of irrigation water salinity on seed germination and seedling development of two rice cultivars, irrigation waters with low SAR (below 3) were prepared in different salinity levels (control [0.5], 2, 4, 8, 12, 16, and 20 dS m(-1)) from different salinity sources (NaCl, MgS0(4), and CaCl2 salts). The average germination rate was decreased for the cv. Baldo 20.19%, while for cv. Osmancik-97 it was 26.73%. The average of the single seedling dry weight of cv. Baldo was 0.2666 g, while for cv. Osmancik-97 it was 0.2569 g. The average single seedling dry weight was 0.2940 g in the control application. In parallel to the increased irrigation water salinity level, the single seedling dry weight decreased. The irrigation water salinity had not affected up to 4 dS m(-1) in terms of the germination rate decrease and the single seedling dry weight of rice, but it started to be affected when increased salinity level to 8 dS m(-1) and it was more effective at higher doses. Also, cv. Osmancik-97 was more sensitive to irrigation water salinity than cv. Baldo. In conclusion, it turns out that the irrigation water to be used in rice farming should not have salinity since the tolerance of the rice plant against irrigation water salinity is low.