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Öğe Alone or Combined Effect of Seaweed and Humic Acid Applications on Rapeseed (Brassica napus L.) under Salinity Stress(Springer Science and Business Media Deutschland GmbH, 2024) Gürsoy, MehtapOrganic fertilisers and biostimulants play a very important role in the germination, seedling stage, yield and quality of plants. Seaweed and humic acid are organic substances known for their positive effects. Therefore, the aim of this study was to investigate the effects of humic acid, seaweed extract and their combined applications against salt stress in oilseed rape at the seedling development stage. The effects of foliar application of seaweed extract (SW1, SW2, SW3) (0, 10, 20 mL), humic acid (HA1, HA2, HA3) (0, 10, 20 mL) and SW + HA (SW1 + HA1, SW2 + HA2, SW3 + HA3) (0, 10(5 + 5 mL L? 1 SW + HA), 20 mL L? 1 (10 + 10 mL L? 1 SW + HA)) on resistance to salt concentrations (S1, S2, S3) (0, 50, 100 mM) in oilseed rape cultivar (Elvis) under greenhouse conditions. In this study, seedling length (SL), root length (RL), total chlorophyll (Total Chl), carotenoids (Crt), electrolyte leakage (EL), malondialdehyde (MDA), superoxide dismutase (SOD), total phenolic compounds (TPC), relative water content (RWC) and proline (Pro) parameters were examined. Both applications played a significant role in reducing the negative effects of salt stress on all parameters studied. The combined application of SW + HA resulted in a remarkable increase in SL, RL TPC, SOD and RWC. In particular, the SW3 + HA3 dose played a more effective role in the antioxidant protective mechanism against stress. According to the PCA analysis, the studied parameters could be divided into 3 different groups. It was concluded that SW and HA can be evaluated as an effective natural, eco-friendly material that can be used to increase the resistance of plants to salt stress. In conclusion, in this study all applications are compared with each other, it has been determined that SW + HA is more effective application in reducing the effects of salt stress than others.Öğe Morphological and biochemical changes with hormone and hydropriming applications in safflower (Carthamus tinctorius L.) seedlings under salinity stress conditions(Academic Press, 2023) Gürsoy, MehtapIn this study, the ameliorative effects of hydro- and hormopriming applications against salt stress of safflower seeds during germination and seedling development stage were investigated. Primed (hydropriming (0, 1, 2 and 3 days) with distilled water and hormopriming for 24 hours (0, 50, 100 and 150 mg L-1 with kinetin) and nonprimed seeds were sown under control (no salt) and salt stress (0, 50, 100 and 150 mM NaCl) conditions. When priming applications under salt stress are compared with the control, germination percentage (GP), seedling lenght (SL), root length (RL), seedling fresh weight (SFW), root fresh weight (RFW), leaf relative water content (RWC), elctrolyte leakeage (EL) parameters reducing the effects of stress, however, it was determined that caused an increase in carotenoid (Car), superoxide dismutase (SOD), total phenolic compounds (TPC) parameters. Besides this, it has an inhibitory effect on the increase in proline (Pro) and malondialdehyde (MDA) content. According to the correlation analysis, significant positive correlation was determined in all parameters. A significant positive correlation was determined for hydropriming GP with SL, RL, SFW, RFW, and for hormopriming with SL, RL, SFW, RFW, total Chl, RWC and GP. According to the PCA analysis, the parameters examined in both applications it is seen that they are divided into four different groups. In conclusion, this study priming applications are compared with each other, it has been determined that hormopriming is more effective in reducing the effects of stress than hydropriming. © Articles by the authors; Licensee UASVM and SHST, Cluj-Napoca, Romania. The journal allows the author(s) to hold the copyright/to retain publishing rights without restriction.Öğe Chemical and biological characterisation of 3D keratin-fibre chitosan-based films from goose feathers(Verlag Eugen Ulmer, 2023) Çakmak, EmelThe rapid increase in the world's population leads to increased consumption of animal products. Its impact on the environment is also an increase in the amount of solid waste such as feathers of poultry after processing. Feathers arise as a by-product of poultry farming, which makes them a sustainable resource in areas where feathers can be used as raw materials. The need for biopolymers alternative to synthetic ones which are not biocompatible and/or environmentally harmful, is increasing in various fields. With more than 90% keratin content, the feathers are a durable reinforcement product. Herein, it is aimed to produce 3D keratin-fibre chitosan-based film obtained from goose feathers for the first time. The method of this research involves Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and scanning electron microscopy (SEM) to characterise and compare the structure of films. Additionally, thickness and antioxidant activity tests were performed. The result obtained from SEM images showed that feather films (100, 200 and 300 mg 3D keratin-fibre) have the roughest surface compared to the control (only chitosan solution and glycerol). Keratin-fibre blending with chitosan showed structural changes, especially at the absorption bands of 3272–2961 cm–1 as well as the amide I, II and III regions. Moreover, thermal properties of the 3D keratin-fibres were increased by increasing the amount of feathers. The present study suggests a new natural material from goose feathers, e.g., for medical applications and reduces the problem of environmentally sensitive waste disposal of feathers. Thus, biological recycling of feathers will provide benefits to the poultry industry and ecosystem.Öğe Determination Conservation Priority Areas and Taxa in Terms of Birds: The Case of Aksaray(Iğdır Üniversitesi, 2023) Çakmak, Emel; Akın Pekşen, ÇiğdemGrowing environmental challenges worldwide and the lack of resources to tackle them require conservationists to set priorities for action. As known; protected areas will be needed as species change their distribution over time due to global climate change, drought, and complete habitat destruction. Although; conservation targets have been met for most species, some conservation features remain unprotected, especially for threatened bird species. There are certain habitat types in Aksaray province where target species belonging to different bird groups are concentrated. Herein; we identify these priority areas for conservation for the current and future estimated distributions of bird species. For this purpose; field studies have been carried out for two years (2015-2017) to represent different habitat types besides bird species detected within the borders of the province. According to our findings; three different habitats (wetland, swamp, and steppe) rich in target species were determined as priority areas for protection. In addition, five different bird species (Vanellus vanellus, Limosa limosa, Numenius arquata, Circus macrourus, Streptopelia turtur) observed in these habitats are in the Vu (Vulnerable) and NT (Near Threatened) categories according to the International Union for Conservation of Nature (IUCN) Red List. As a result;both the protection and monitoring of the identified habitats and taxa that directly reflect the health of the habitat will facilitate the ustainability of priority areas in future. This study could be a resource for future regulation of conservation strategiesÖğe Keratin isolation methods from waste goose feather: an effective comparison(Bingöl Üniversitesi Fen Bilimleri Enstitüsü, 2022) Çakmak, EmelConversion of biowaste into value-added material has attracted great interest lately. One of these materials is keratin, which is found in different structures such as nails, hair, beak, wool, feathers, claws and horns. Until now, keratin isolation has been carried out from waste wool, feather, hoof and hair. However, the development of effective techniques to obtain keratin without any damage to the secondary structure of the protein remains a challenging task. Herein, two distinct keratin isolation methods (sodium sulfide and ethylenediamine tetraacetic acid) were compared for the first time from Domestic Goose (Anser domesticus) waste feathers. The Kjeldahl method was used for the determination of crude protein by two methods from the obtained keratin powders and their antioxidant activities were conducted. According to our findings, keratin obtained from goose feathers using sodium sulfide showed higher yield (86.34%). On the other hand, the antioxidant activity of keratin obtained from the method prepared using ethylenediamine tetraacetic acid was found to be approximately three times higher than the other method, and our results proved that waste goose down could be considered as a potential source of keratin for further studies.Öğe Role of biostimulant priming applications on germination, growth and chlorophyll content of sunflower (Helianthus annuus L.) cultivars under salinity stress(Selçuk Üniversitesi Ziraat Fakültesi, 2022) Gürsoy, MehtapSalinity, which is one of the abiotic stresses, has become an important obstacle in agricultural areas. The use of humic acids (HA) as a biostimulant is increasing day by day and it is tried to increase the resistance of plants against stress. In this study, the effects of HA application of 0-15ml L?1 (4 concentrations) on the resistance to salt (S) 0-150 mM L?1 (4 concentrations) stress in 3 sunflower cultivars (Maximus (C1), Sirena (C2), Reyna (C3) were investigated under laboratory conditions. In the study; germination percentage (GP), mean germination time (MGT), salt tolerance percentage (STP), seeding length (SL), root length (RL), relative water content (RWC), real water content (GSI), total chlorophyll (Chl), chlorophyll stability index (CSI) parameters were examined. As a result of the study, HA applications played a role in reducing the negative effects of salt stress on the examined parameters. It was concluded that HA can be evaluated as an effective material that can be used to increase resistance and tolerance of plants against salt stress.Öğe Effect of foliar-applied aminopolysaccharide chitosan on seedling growth characteristics, antioxidant enzyme activity, and chlorophyll and carotenoid contents of safflower (Carthamus tinctorius L.) cultivars under saline conditions(Pakistan Botanical Society, 2022) Gürsoy, MehtapSalinity is a major concern in agricultural areas all over the world. Aminopolysaccharide chitosan is a biopolymer that is known to increase plant tolerance against salinity by increasing various antioxidant enzyme activities. Less studies are available on the effect foliar application of chitosan on safflower plants (Carthamus tinctorius L.) in saline conditions in the greenhouse. In this study, the effects of foliar aplication of 0-0.6% chitosan (4 concentrations) on the resistance to 0-150 mM salt (4 concentrations) in 3 safflower cultivars (Balcı, Linas and Remzibey) were investigated under greenhouse conditions. Chitosan applications played a role in reducing the negative effects of salt stress on the examined morphological features. In addition, the positive effect of chitosan application on enzyme activities in chlorophyll, carotenoid, SOD and CAT was determined by increasing salt doses. However, any positive effect of chitosan on the reduction of MDA content could not be determined. It was concluded that chitosan can be evaluated as an effective natural biopolymer material that can be used to increase resistance and tolerance of plants against salt stress.Öğe Discovery of protein-based natural hydrogel from the girdle of the 'sea cockroach' Chiton articulatus (Chitonida: Chitonidae)(PeerJ, 2022) Çakmak, Emel; Koç-Bilican, Behlül; Avila-Poveda, Omar Hernando; Karaduman, Tuğçe; Cansaran-Duman, Demet; Williams, Suzanne T.; Kaya, MuratHydrogels are widely used materials in biomedical, pharmaceutical, cosmetic, and agricultural fields. However, these hydrogels are usually formed synthetically via a long and complicated process involving crosslinking natural polymers. Herein, we describe a natural hydrogel isolated using a 'gentle' acid treatment from the girdle of a chiton species (Chiton articulatus). This novel hydrogel is shown to have a proliferative effect on mouse fibroblast cells (cell line, L929). The swelling capacity of this natural hydrogel was recorded as approximately 1,200% in distilled water, which is within desired levels for hydrogels. Detailed characterizations reveal that the hydrogel consists predominantly (83.93%) of protein. Considering its non-toxicity, proliferative effect and swelling properties, this natural hydrogel is an important discovery for material sciences, with potential for further applications in industry. Whether the girdle has some hydrogel activity in the living animal is unknown, but we speculate that it may enable the animal to better survive extreme environmental conditions by preventing desiccation.Öğe Effect of salicylic acid pretreatment on seedling growth and antioxidant enzyme activities of sunflower (Helianthus Annuus L.) and linseed (Linum Usitatissimum L.) plants in salinity conditions(National Agricultural Reasearch and Development Institute, 2022) Gürsoy, MehtapSalinity has become a problem all over the world in agricultural areas. Plants develop a defense mechanism to increase various antioxidant enzyme activities to resist salt stress. In addition, the effects of stress are tried to be reduced with various applications. One of these applications is the application of salicylic acid (SA). However, the effects of SA application vary depending on the plant species and cultivar. In this study, the seeds of sunflower and linseed plants were primed for 4 hours with different concentrations of SA doses 0 (control) (SA1), 0.25 mM (SA2), 0.50 mM (SA3), 1.00 mM (SA4) priming. In the laboratory, the seeds were permitted to develop in petri dishes with different salt 0 (control) (S1), 50 mM (S2), 100 mM (S3), 150m M(S4) concentrations for 14 days. As a result of the study, it was determined that SA had a positive effect on both morphological and chemical properties in both plant species grown under salt stress.Öğe Isolation and characterization of 3D chitin from a mite species Trachytes pauperior (Parasitiformes: Uropodina)(Salih DOĞAN, 2021) Çakmak, Emel; Koç Bilican, BehlülChitin is the most abundant structural biopolymer after cellulose in terrestrial ecosystems. Until now, chitin isolation in powder or granule form has been carried out from many macro living groups (Arthropoda, Crustacea, Mollusca etc.). However, studies on chitin characterization of microscopic organisms have remained limited. In this study, three dimensional (3D) chitin extraction was performed for the first time from Trachytes pauperior (Berlese), a mite species. The obtained chitin was observed by light microscopy and characterized by FT-IR, and SEM analysis. Our findings suggest that chitin, which was obtained in high purity and constitutes a large part of the organism's body structure, could be a potential source for future studies.Öğe Aspir (carthamus tinctorius l.) çeşitlerine uygulanan mikro element gübrelemesinin çimlenme ve fide dönemine etkilerinin belirlenmesi(Atatürk Bahçe Kültürleri Merkez Araştırma Enstitüsü Müdürlüğü, 2020) Gürsoy, MehtapÖzellikle her yıl hissedilir derecede artan bitkisel yağ açığı; yurt dışından hem bitkisel yağ, hem de yağlı tohum ithali ile karşılanmaktadır. Yağ açığının kapatılabilmesi için mevcut yağlı tohumlu bitkilerin üretiminin artırılması zorunlu hale gelmiştir. Bitkisel üretimi artırmada çeşitli yöntemler uygulanmaktadır. Bunlardan birisi de gübreleme yapmaktır. Ancak genellikle makro besin elementleri gübrelemesi daha çok uygulanmaktadır. Mikro besin elementi gübrelemesi çoğunlukla göz ardı edilmektedir. Bitki gelişiminde ilk gelişme dönemleri olan çimlenme ve fide dönemleri verim üzerinde çok önemlidir. Bitki besin elementlerinin toprakta yeterli miktarda bulunması da bitkilerin çimlenme ve gelişimi için son derece önemlidir. Bu araştırma; farklı mikro besin elementlerinin aspir çeşitlerinin çimlenme ve fide gelişimi üzerine etkisini incelemek amacıyla Aksaray Üniversitesi Güzelyurt Meslek Yüksekokulu Bitkisel ve Hayvansal Üretim Bölümü uygulama serasında 3 tekerrürlü olarak Tesadüf Parselleri Deneme Desenine göre yürütülmüştür. Aspir diğer yağ bitkilerine göre iklim ve toprak istekleri bakımından daha az seçici olmakla beraber yağ açığımızın kapatılmasında ayçiçeğine alternatif bir bitkidir. Araştırmada materyal olarak 7 aspir çeşidi (Asol, Balcı, Olas, Linas, Göktürk, Hasankendi, Dinçer) ve mikro besin elementlerinin (Fe, Mn, Zn) 3 farklı dozu (kontrol (0), 5, 10 ml/l) kullanılmıştır. Araştırmada fide boyu, bitkide yaprak sayısı, gövde çapı, fide yaş ağırlığı, kök sayısı, kök yaş ağırlığı ve kök uzunluğu özellikleri incelenmiştir. Araştırma sonucunda en kısa fide boyu 15.87 cm olarak kontrol uygulamasında ve Asol çeşidinde, en uzun ise, 18.48 cm olarak Dinçer çeşidinde saptanmıştır. Kök sayısı özelliğinde ise, en az kök Asol çeşidinde, en fazla ise Linas çeşidinde belirlenmiştir. Çalışma sonucunda 10 ml/l dozunun Dinçer çeşidinde en iyi sonuçları verdiği gözlemlenmiştir.Öğe Effect of magnetic field strength on the seedling development in sunflower (Helianthus annuus L.)(Parlar Scientific Publications, 2020) Gürsoy, MehtapIt is an established fact that the amount of food needed to feed the ever growing future human population will not be enough, i f appropriate measures are not taken. Accordingly, different production methods have been developed. This study aimed to determine the effect of magnetic field strength on seedling development in sunflower (Helianthus annuus L.). The "Tarsan-1018" oil sunflower variety was used in the study. The seeds were exposed to different magnetic field strengths (0-control, 75, 150 and 300 mT) for 36h before planting. The study was carried out with four replications according to the randomized plot design. In the study, seedling length (cm), root length (cm), seedling fresh weight (mg), seedling dry weight (mg), and seedling water content (mg) values were determined. All properties except for seedling dry weight were positively affected by magnetic field treatments. The study showed that the magnetic field strength had a positive effect on the seedling growth in sunflower.Öğe Effect of chitosan pretreatment on seedling growth and antioxidant enzyme activity of safflower (Carthamus tinctorius l.) cultivars under saline conditions(Corvinus University of Budapest, 2020) Gürsoy, MehtapToday, salinity has become a major problem in agricultural areas all over the world. However, plants develop a defense mechanism against stress by increasing various antioxidant enzyme activities in order to tolerate salt and other stress factors. In addition to this mechanism, the effects of stress are attempted to be reduced by various applications that increase enzyme activities. One of these applications is chitosan application. In this study, 4 different doses of chitosan pretreatment (0 (control) (Ch1), 0.2% (Ch2), 0.4% (Ch3), 0.6% (Ch4)) were applied to safflower cultivars (Balcı, Linas, Remzibey) for 4 hours under laboratory conditions. For each chitosan application, 50 seeds were germinated under saline conditions (0 (control) (S1), 50 mM (S2), 100 mM (S3), 150 mM (S4)) in petri dish. As a result of the study, it has been determined that chitosan applications provide increases in seedling length, root length, seedling wet weight, root wet weight, germination percentage, total chlorophyll, carotenoid, ?-carotene and lycopene parameters. In the study, it was determined that the most effective chitosan application was Ch3 in terms of the properties examined in stress conditions. According to the research results, it was concluded that chitosan can be considered as a natural material that can positively affect in the defense mechanism of plants under stress conditions.Öğe The effects of heat treatment on the germination and seedling growth of sorghum (sorghum sp. l. moench)(Parlar Scientific Publications (P S P), 2019) Gürsoy, Mehtap; Özgen, YasinSorghum is a tropical plant belonging to the Poacea family. In addition to being a human and animal food source, it is an important plant used in bioenergy production. Moreover, it is known to have a high adaptability to different environmental conditions. The present study investigated the effects of heat treatment at different temperatures (20 degrees C, 30 degrees C) on the germination and seedling growth of sorghum. The germination rate, germination index (GI), germination rate index (GRI), coefficient of velocity of germination (CVG), mean germination time (MGT), seedling vigor index, root and shoot lengths(cm), seedling age and dry weight (mg), chlorophyll content, and antioxidant enzyme activity of sorghum were examined. The root and shoot lengths of the plant increased with increasing temperature. The highest chlorophyll content was obtained at 20 degrees C, while a decrease in all properties was observed at 30 degrees C. In conclusion, the results reveal that heat treatment at 30 degrees C positively affected the germination parameters in terms of the investigated properties.Öğe Agronomic importance of first development of chickpea (Cicer arietinum L.) under semi-arid conditions: II. Seed Imbibition(Science Alert, 2012) Ulukan, Hakan; Bayraktar, N.; Oksel, A.; Gürsoy, Mehtap; Koçak, NilüferDue to the slowness growth and weakness of the first developments of chickpea (Cicer arietinum L.), it could not combated with weeds and easiliy caught up by Ascochyta blight (Ascochyta rabiei (Pass) Labr.) disease. Additionally, due to biotic and abiotic stress factors, esp. at the late sowing, important seed yield losses could be happened. To be able to avoid from them is only possible to accelerate of its first development as possible as. So, one of the best solutions to is to use chemical compounds such as Humic Acid (HA) known soil regulator under the semi-arid conditions. With this aim this research was performed in a Randomized Complete Block Design (RCBD) with four replications under semi-arid field conditions during (2008/2009) and (2009/2010) in Turkiye. Two cultivars (V1 = Gokce and V2 = Ispanyol) and four seed imbibition methods (A0 = 0, Al = Tap Water, A2 = 1/2 Tap Water + 1/2 Humic acid (HA), A3 = Full HA, as w/w) and seven yield components Plant Height (PH), Number of Branches per Plant (NBP), Number of Pods per Plant (NPP), First Pod Height (NFP), Number of Seeds per Pod (NSP), Seed Weight per Plant (SWP) and 100-Seed weight (HSW) were investigated. The PH and FPH were affected the A0, the NBP, NPP and NSP were affected the A2 and the SWP and HSW were given the varied but not clear responses according to varieties for all the parameters in A1. The A0 and A1 were encouraged the germination and top soil of the plant but, the A2 to A3 were encouraged root system's development. It was concluded that the A2 is a promising method which makes the maximum and positive effect to the first development of the chickpea agronomy under the semi-arid conditionsÖğe Humik asit uygulama zamanı ve dozlarının kışlık kolzada verim ve verim öğelerine etkileri(T.C. Tarım Ve Orman Bakanlığı, 2016) Gürsoy, Mehtap; Nofouzi, Farzad; Başalma, DilekBu çalışmanın amacı; kışlık kolzaya farklı zamanlarda ve değişik dozlarda humik asit uygulamalarının verim ve verim öğelerine etkilerini belirlemektir. Ankara koşullarında 2013-2014 yılında Tesadüf Bloklarında Bölünmüş Parseller deneme desenine göre üç tekerrürlü olarak kurulan denemede Bristol çeşidi kullanılmıştır. Humik asit dozları olarak (0, 250, 500, 1000 ml/da) 4 farklı doz uygulanmıştır. Humik asit uygulama zamanları olarak; çıkış, 6-8 yapraklı, sapa kalkma, çiçeklenme dönemleri belirlenmiştir. Araştırmada; bitki boyu, ana sapa bağlı yan dal sayısı, ana saptaki kapsül sayısı, kapsülde tohum sayısı, bin tohum ağırlığı ve tohum verimine ait ölçüm ve gözlemler yapılmıştır. Araştırmanın sonucunda ele alınan özelliklerin tamamında humik asit uygulama zamanları ve dozları arasındaki farklılıklar istatistiki açıdan önemli bulunmuştur. En yüksek değerler, bitki boyunda 118.60 cm ile 6-8 yapraklı dönemde ve 250 ml/da humik asit uygulamasından, ana saptaki kapsül sayısı 30.77 adet ile sapa kalkma ve 500 ml/da humik asit dozundan, bin tohum ağırlığı 3.68 g ile 6-8 yapraklı dönemde ile kontrol uygulamasından ve tohum verimi değeri de 238.40 kg/da ile 6-8 yapraklı dönemde ve 250 ml/da uygulamalarından elde edilmiştir. Bu çalışmada genel olarak, humik asit dozlarından 250 ve 500 ml/da uygulamalarının ve uygulama zamanı olarak da 6-8 yapraklı ve sapa kalkma dönemlerinin incelenen özellikler bakımından daha iyi sonuçlar verdiği gözlenmiştirÖğe Ankara koşullarında kışlık Kolzada uygun ekim zamanının belirlenmesi(Tarla Bitkileri Merkez Araştırma Enstitüsü Dergisi, 2015) Gürsoy, Mehtap; Nofouzi, Farzad; Başalma, DilekBu araştırma, 2012 - 2013 yetiştirme sezonunda (2012 Eylül-2013 Haziran) Ankara koşullarında kışlıkkolzada farklı ekim zamanlarının verim ve verim unsurları üzerine etkilerini belirlemek amacıyla TesadüfBlokları Deneme desenine göre üç tekerrürlü olarak Ankara Üniversitesi Ziraat Fakültesi Tarla Bitkileri Bölümüdeneme arazisinde yürütülmüştür. Kışlık kolza çeşidi olarak Capitol kullanılmış olup, 5 farklı ekim zamanında(2 Eylül, 16 Eylül, 30 Eylül, 14 Ekim, 28 Ekim) ekimler yapılmıştır. Araştırmada; bitki boyu, ana sapa bağlıyan dal sayısı, ana saptaki kapsül sayısı, kapsülde tohum sayısı, bin tane ağırlığı, tohum verimi, yağ oranıve yağ verimine ait gözlemler yapılmıştır. Araştırma sonucunda ele alınan özelliklerin tamamında ekimzamanları arasındaki farklılıklar istatistiki açıdan önemli bulunmuştur. Ortalama değerlere bakıldığında; enyüksek bitki boyu (158.2 cm), en fazla yan dal sayısı (6.73), en fazla ana saptaki kapsül sayısı (47.53),kapsülde tohum sayısı (29.03), bin tane ağırlığı (2.85 g), tohum verimi (246.70 kg da-1) ile en yüksek yağoranı (% 45.0) ve en yüksek yağ verimi (107.20 kg da-1) de en erken ekimden (2 Eylül) elde edilmiştir. Gecikenekimler tohumdaki yağ oranının azalmasına neden olmuştur. Araştırma sonucunda; Ankara koşullarında kışlıkkolza için en uygun ekim zamanının eylül ayı başı olması gerektiği belirlenmiştirÖğe Bitkisel üretimde allelopati(Uludağ Üniversitesi, 2013) Gürsoy, Mehtap; Balkan, Alpay; Ulukan, HakanBitkide üretilen ve ikincil metabolit olan allelokimyasalların neden olduğu “allelopati”; direkt ya da dolaylı olarak önemli bir yere sahiptir. Genel olarak, kendinden sonra gelen aynı (autotoxicity) ya da farklı türlere (heterotoxicity) ait bitki kökler tarafından üretilen bu maddeler ya büyüme ve gelişmeyi azaltıp, durdurabilmekte ya da tamamen önleyebilmektedir. Bu olayda bitkinin yaşı, toprağın yapısı, genotip, nem, ışık, sıcaklık, nem, ekoloji gibi faktörler çok önemlidir. Özellikle sürdürülebilirlik bakımından ekim nöbeti, anızlı nadas, malçlı nadas gibi çeşitli yetiştiricilik tekniklerini kullanmanın büyük bir yeri vardır. Genotip, toprak, ekoloji ve yetiştiricilik teknikleri dikkate alınmazsa, tarımsal üretimin düzeyi bitki besin maddeleri, nem, sıcaklık, stres faktörleri ve kendinden sonra gelen bitkiye bıraktığı tohum yatağı, özellikle de bitki kök bölgesindeki allelopatik madde(lerin) konsantrasyonunca belirlenir. Nitekim ortam nem miktarındaki fazlalık ya da aşırılıktan dolayı (örnek Karadeniz bölgesi); tarımı yapılan bitkinin üretiminde allelopatik etkileşim(ler)’den dolayı azalmalar ortaya çıkmakta; ancak özellikle nem oranındaki azalmalar allelopatik kaynaklı olumsuzlukların her zaman aynı şiddette oluşmasını önlemektedir.Öğe First assessment on the molecular phylogeny of Anatololacerta (Squamata, Lacertidae) distributed in Southern Anatolia: insights from mtDNA and nDNA markers(Taylor&Francis LTD, 2016) Candan, Kamil; Kankılıç, Tolga; Güçlu, Özgür; Kumlutaş, Yusuf; Durmuş, Salih Hakan; Lymberakis, Petros; Poulakakis, Nikos; Ilgaz, CetinThe genus Anatololacerta (Lacertidae) occurs mainly in Anatolia (western and southern Turkey) and on the Aegean islands Samos, Ikaria, and Rhodos. Although its taxonomy has long been debated and is currently nascent, three morphological species have been attributed to this genus: Anatololacerta anatolica, Anatololacerta oertzeni, and Anatololacerta danfordi. Here, we investigated the evolutionary history of A. oertzeni and Anatololacerta danfordi based on both mitochondrial and nuclear markers (16S rRNA and cmos). In total, 34 Anatololacerta specimens were analyzed using maximum likelihood (ML) and Bayesian inference (BI) methods. Our results supported the presence of four well-supported lineages: two belongs to A. oertzeni and two to A. danfordi. The temporal diversification of these lineages probably started with the divergence of the first A. oertzeni lineage from western Antalya at 7.9 Mya. The other two major splits may have occurred in early Pliocene (4.4 Mya: the divergence of the second A. oertzeni from A. danfordi) and in late Pliocene (2.7 Mya: the divergence of the two lineages of A. danfordi). The phylogeographical scenario suggests that the major diversification events (from late Miocene to late Pliocene) could be related with climatic oscillations (such as the late Miocene aridification and the Messinian Salinity Crisis) and tectonic movements (such as the uplift of the central Taurus mountain).Öğe Morphological and biochemical changes in response to salinity in sunflower (Helianthus annus L.) cultivars(PAGEPRESS PUBL, 2018) Taher, Mehdi; Beyaz, Ramazan; Javani, Marieh; Gürsoy, Mehtap; Yıldız, MustafaThis study was conducted to evaluate the alterations of some morphological and biochemical parameters of sunflower cultivars ('08-TR-003', 'TR-3080' and TARSAN- I 018') under salt stress. For this aim, the seedling of sunflower cultivars was irrigated with tap water as a control, and with salinised water With 50, 150 and 250 mM NaC1 for 30 days under controlled conditions. Salinity caused an apparent reduction in morphological parameters (plant height, leaf area, fresh weight, dry matter and water content) in all cultivars. Salt stress significantly (P<0.01) reduced the activity of ghttathione reductase (GR) and ascorbate peroxidase (APX) activities in all sunflower cultivars expect for superoxide dismutase (SOD) activity. According to our results, SOD seems to play a key role in the antioxidative process in salt treated sunflower plants. Proline and malondialdehyde contents were significantly (P9.0.05) increased under salt stress in all cultivars. Among the cultivars 'TR-3080' had greater values in terms of morphological (plant height. leaf area. fresh weight, water content) and biochemical APX and SOD (secondly) activities and proline contents] parameters. In the light of these findings. cv. 'TR-3080' seems to he less affected by salt stress.
