Browsing by Author "Cakmakci, Ozlem"

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Bioactive Constituents of Allium Vineale L. Accessions From Eastern Turkey
(Elsevier, 2022) Cakmakci, Ozlem; Sensoy, Suat; Alan, Ali R.
Edible parts of Alliums are rich sources of health promoting bioactive compounds such as polyphenols, flavonoids, and antioxidants. These compounds are known to promote human health by reducing the risk of various cancer, cardiovascular and brain and diabetes diseases. Allium vineale is an edible wild Allium species collected from nature and used in herbed cheese production. Quality of herbed cheese is associated with A. vineale leaves, the main ingredient used as fresh or dried in the process of cheese production. The aim of this study was to evaluate bioactive constituents in above ground organs of 10 accessions from an A. vineale germplasm collected from Van province of Turkey. Each accession was represented with 10 plants in the analyses for bioactive compounds. It was found that A. vineale accessions were significantly different from each other for their bioactive content levels. Statistically significant differences were found among the accessions for total phenolic content and antioxidant activities. On average, A. vineale samples contained 60.11 g GAE kg(-1) total phenolic compound and 98.84 mmol TR kg(-1) total antioxidant capacity. The main phenolic compound detected in A. vineale was protocatechuic acid (similar to 221 g kg(-1)). The findings obtained from this study provide an opportunity for selecting genetically superior accessions with high bioactive compound production as starting materials in the improvement of new A. vineale cultivars suited for controlled cultivation.
Changes in Some Seedling Growth Parameters, Nutrient Content and Enzyme Activity in Different Melon (Cucumis Melo L.) Genotypes Under Deficit Irrigation Conditions
(Tarbiat Modares Univ, 2025) Cakmakci, Ozlem; Bitik, Selma Kipcak; Ekincialp, Aytekin; Erdinc, Ceknas; Kabay, Turgay; Eser, Fuat; Sensoy, Suat
Increasing need for drought adaptation measures to conserve water and sustain crop yield in water-scarce regions is driven by severe and recurrent droughts. Achieving sustainable production entails studying deficit irrigation as a means to enhance water productivity and selecting genotypes resilient to soil water deficits. In the present study, 17 different melon (Cucumis melo L.) genotypes collected from the Van Lake Basin and 3 hybrids and 1 standard melon cultivar for control purposes were used for this purpose. The study was carried out under climate room conditions. Two different irrigation levels (I100: 100% full irrigation, I50: 50% Deficit Irrigation-DI) were applied in the study for deficit irrigation. Water applications started with the emergence of the second true leaf of the plants and, after one-month, different growth, nutrient, and enzyme contents of the seedlings were determined. In general, it was determined that deficit water application negatively affected seedling growth, and root dry matter, stomatal opening and density, potassium, APX and SOD enzymes, and MDA content increased, while the other tested parameters decreased. The melon genotypes of the Van Lake Basin were found to vary in response to deficit irrigation treatments.
Determination of Phenolic Compound and Organic Acid Contens of Some Grape Varieties Grown in Hizan (Bidis) Province
(Kahramanmaras Sutcu Imam Univ Rektorlugu, 2020) Uyak, Cuneyt; Dogan, Adnan; Sensoy, Ruhan Ilknur Gazioglu; Keskin, Nurhan; Cavusoglu, Seyda; Cakmakci, Ozlem; Kunter, Birhan
Aim of this study was to determine phenolic compound and organic acid contents of 17 local grape varieties grown in Hizan (Bitlis) province of Turkey. Organic acid and phenolic compound amounts were determined via HPLC (High Performance Liquid Chromatography). Organic acids amount of grape varieties ranged from 1362.06 mu g g(-1) (Sapi Beyaz) to 4269.90 mu g g(-1) (Husni Beyaz) fortartaric acid and from1072.70 mu g g(-1) (Alaki) to 2858.69 mu g g(-1) (Kus Uzumu) for malic acid. Phenolic compound amounts of grape varieties ranged from 4.718 mu g g(-1) (Husni Beyaz) to 33.177 mu g g(-1) (Sapi Yesil) for gallic acid, from 6.293 mu g g(-1) (Beyaz Bineteti) to 20.201 mu g g(-1 )(Alaki) for vanilic acid, from 0.174 mu g g(-1 )(Beyaz Bineteti) to 2.830 mu g g(-1) (Alaki).for rutin, from 0.193 mu g g(-1) (Beyaz Bineteti) to 1.395 mu g g(-1 )(Kus uzumu) for protocatechuic acid, from 0.509 mu g g(-1) (Husni Beyaz) to 12.036 mu g g(-1) (Beyaz Guzane) for clorogenic acid, from 0.050 mu g g(-1 )(Siyah Guzane) to 0.485 mu g g(-1) (Husni Beyaz) for syringic acid, from 0.043 mu g g(-1) (Alaki) to 0.211 mu g g(-1) (Kirmizi Tayfi) for p-coumaric acid, from 0.041 mu g g(-1) (Beyaz Sinciri) to 1.238 mu g g(-1) (Siyah Guzane) for ferulic acid, from 0.023 mu g g(-1) (Beyaz Sinciri) to 1.083 mu g g(-1) (Kus Uzumu) for o(-)coumaric acid from 0.209 mu g g(-1) (Siyah Guzane) to 2.360 mu g g(-1) (Inek Memesi) for resveratrol, from 0.086 mu g g(-1) (Beyaz Sinciri) to 1.228 mu g g(-1) (Alaki) for florodiz.
The Effect of Cucumber (Cucumis Sativus) Cultivation in Aquaponic and Hydroponic Systems on Plant Nutrient Elements and Antioxidant Enzyme Activity
(Parlar Scientific Publications (p S P), 2018) Guzel, Senol; Odun, Ugur Cansin; Cakmakci, Talip; Cakmakci, Ozlem; Sahin, Ustun
Search for raw materials, especially for those used in food production, gained further importance with the increasing world population. In recent years, aquaponic systems which integrated form of fish and plant cultivation were increasingly preferred in the search for new food sources. In this study, culture mediums in aquaponic and hydroponic systems were investigated for koi carps (Cyprinus carpio) and cucumber plants (Cucumis sativus). At the end of the study, nutrient element and chlorophyll contents with antioxidant enzyme activities of the plants grown in aquaponic and hydroponic systems were compared. The comparison between aquaponic and hydroponic systems showed that the differences between the systems in terms of Ca, Na and P were not statistically significant, while there was a statistically significant difference in K and Mg levels among the macro elements between the systems. Differences in microelements (B, Cd, Cr, Cu, Fe, Mn, Ni, Pb and Zn) were significant among systems. In the aquaponic system, Cd, Cr, Fe, Ni, Pb, and Zn levels were higher compared to those in the hydroponic system, while B, Cu and Mn levels were higher in the hydroponic system. There was no difference in antioxidant system activities (CAT, APX, MDA, SOD) in both systems. The difference between the systems in terms of chlorophyll content was significant, and chlorophyll content in the hydroponic system was higher than that in the aquaponic system.
Effects of Arbuscular Mycorrhizal Fungi in Melon (Cucumis Melo L.) Seedling Under Deficit Irrigation
(Parlar Scientific Publications (p S P), 2017) Cakmakci, Ozlem; Cakmakci, Talip; Durak, Emre Demirer; Demir, Semra; Sensoy, Suat
Melon (Cucumis melo L.) is an important vegetable and is growth in Eastern Anatolia region of Turkey since the early times. Drought is effective abiotic stress factors for plants. As is known that arbuscular mycorrhizal fungi (AMF) have positive effects on plant growth and arbuscular mycorrhizal symbiosis can play a prominent role in tolerance to abiotic stress factors. Plant material used in this study is cv. Napolyon F-i cultivated commonly in the Lake Van Basin. The effects of two different mycorrhiza applications (Glomus intraradices and Glomus spp.) on some growth parameters in melon seedlings under water deficit were investigated. There were four different water deficit applications (control, 20 %, 40 % and 60 % water deficit). At the end, it was found that mycorrhiza improved the physiological and photosynthetic parameters of inoculated plants compared with non-AMF plants in water deficit conditions. Moreover, AM Fungi increased the chlorophyll content of melon seedlings. Results indicated that AMF can ameliorate the tolerance to deficit irrigation in melon seedlings.
Genetic Characterization of Rheum Ribes (Wild Rhubarb) Genotypes in Lake Van Basin of Turkey Through Issr and Ssr Markers
(Friends Science Publishers, 2019) Ekincialp, Aytekin; Erdinc, Ceknas; Turan, Sibel; Cakmakci, Ozlem; Nadeem, Muhammad Azhar; Baloch, Faheem Shehzad; Sensoy, Suat
Rheum ribes L. (wild rhubarb) is one of the less known plants to the world and the only species from the Rheum genus present in Turkey. In this study, one R. rhabarbarum (as check genotype) and 80 R. ribes genotypes were collected from different geographical locations of Turkey for the investigation of diversity and genetic structure using ISSR (Inter Simple Sequence Repeat) and SSR (Simple Sequence Repeats) markers. SSR markers reflected higher (100%) polymorphism as compared to the ISSR marker. However, ISSR markers produced higher average Polymorphism Information Content (PIC) value (0.805) than the SSR markers (0.724). A Similar range of (PIC) values with ISSR markers was found greater (0.935-0.395) as compared to the range of SSR makers (0.88-0.47). Using Jaccard similarity index, genetic distance was measured for both markers and average genetic distance was found to be higher with ISSR markers as compared to the SSR markers. Neighbor-joining analysis clustered genotypes into 3 groups for both marker systems. During this study some distinct genotypes like R. rhabarbarum, YYUERC19, YYUERCO9 and YYUNIER65 were investigated that can be used as candidate parents for the development of R. ribes L. varieties. Structure analysis grouped the genotypes according to altitude by clustering genotypes having at more than 2000 m in one group and genotypes less than 2000 m altitude in another group. Genetic variations observed in this study can be applied to investigate various traits of interest for the R. ribes L. breeding. (C) 2019 Friends Science Publishers
Nano-Silica Modulates Salt Stress Response in Lettuce by Enhancing Growth, Antioxidant Activity, and Mineral Uptake
(Czech Academy of Agricultural Sciences, 2025) Cakmakci, Ozlem; Sensoy, Suat
Salt stress is a significant abiotic factor that limits crop growth and yield. Nano-fertilisers, effective even in small quantities, have gained prominence for their ability to enhance plant growth and stress tolerance. This study investigated the effects of silica nanoparticles (SiNPs) at different concentrations (0, 100, 200, and 400 mg/L solution) under varying saline water application levels (0.6, 1.2, 2.4, and 3.6 dS/m) on growth parameters, antioxidant enzyme activity, and nutrient uptake in lettuce. The greenhouse experiment followed a randomised complete block design with three replications. Results demonstrated that SiNPs effectively increased head diameter and plant height by approximately 8% and 14%, respectively, compared to the control. Similarly, dry matter content improved by 22% with SiNP-400. While salinity stress significantly increased electrolyte leakage and lipid peroxidation (as indicated by malondialdehyde (MDA) content), SiNPs reduced MDA levels by 21%, indicating lower oxidative damage. Soilplant analysis development (SPAD) values improved by 6%, and leaf relative water content increased by 4% with the application of SiNPs. Enzyme activity analysis revealed that salinity stress enhanced superoxide dismutase (SOD) and catalase (CAT) activities, but SiNP-400 reduced SOD and CAT levels by 23% and 50%, respectively, suggesting a decrease in oxidative stress. Furthermore, SiNPs enhanced nutrient uptake, significantly increasing the contents of Mg, Fe, and Zn while reducing Na accumulation. The highest Mg, Zn, and K concentrations were recorded under the SiNP-400 treatment. These findings highlight the potential of silica nanoparticles in mitigating the effects of salt stress and improving plant resilience, highlighting their role in sustainable agriculture. © 2025 Elsevier B.V., All rights reserved.