Browsing by Author "Tunçtürk, R."

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Determination of Morphological Measurements, Stoma and Pollen Characteristics With Pollen Viability of Some Allium Species
(Centenary University, 2020) Şelem, E.; Nohutçu, L.; Tunçtürk, R.; Tunçtürk, M.
Although Allium species are used in a wide variety of fields, they are frequently preferred as dry or fresh spices for intestine disorders, loss of appetite, for regulating blood sugar, pain reliever, wound healing, acne treatment and herby cheese making in the Eastern Anatolia region. In this study, it was aimed to determine of morphological measurements (plant length, stem length and diameter, leaf length and diameter, number of leaves, umbella diameter, pedicel length), stoma and pollen characteristics and pollen viability of some Allium species which are used extensively in our country especially due to their aroma and antimicrobial properties. Allium akaka, A. giganteum, A. kharputense, A. scorodoprasum subsp rotundum, A.vineale and A. sintensii species collected from their natural habitat they were cultivated and planted in plots prepared in the Van Yüzüncü Yıl University Medicinal and Aromatic Plants Garden during the field trips from Van and surrounding cities in 2016. As a result, according to the measurements and evaluations made in the observation plots where the plants are located, it has been observed that there is a good adaptation in terms of morphological features, it was determined that A. kharputense and A. sintensii species showed a weaker growth than others. In terms of pollen amount and vitality, which is an important parameter in high seed yield, it was observed that A.vineale and A. scorodoprasum subsp. rotundum species came to the fore. It has been observed that stomata, which play an important role in adaptation and photosynthesis, have the highest density of A. kharputense species and the highest measure is A. vineale. © 2020, Centenary University. All rights reserved.
Effect of Different Organic Fertilizers and Rhizobium Strains Applications on Some Agronomical Traits in Fenugreek (Trigonella Foenum-Graecum L.)
(Centenary University, 2016) Tunçtürk, R.; Kulaz, H.; Çiftçi, V.
This study was carried out to determine the effects of various fertilizer sources, and bacteria inoculation on the yield and yield components of fenugreek (Trigonella foenum graecum L.) under irrigated conditions in 2011 and 2012 spring periods. Field trials were conducted at randomized complete block split plot design with three replications on the experimental area of Yuzuncu Yıl University, Agricultural Faculty. As factorial, four different fertilizer sources [control, humic acid, aluminium silicat and organic (B5A) manure], three bacteria inoculants (#1, #22 and #760). Trait such as plant height, the number of branch, first bean height, bean length, the number of bean per plant, the number seed per bean, 1000-seed weight, hectoliter weight, seed yield, seed yield per plant, seed protein and seed fatty oil content of fenugreek seed were investigated. In the result of the study, the highest seed yield (743 kg ha-1) was obtained from the bacteria 760# inoculant in 2011; while the highest seed yield (1041 kg ha-1) was obtained from the bacteria #1 inoculant in 2012. However, significant differences were not determined between bacteria inoculants for seed yield in 2012. For fertilizer sources, the highest seed yields (864 kg ha-1 and 1124 kg ha-1) were obtained from the aluminium silikat fertilization in 2011 and 2012, respectively. © 2016, Centenary University. All rights reserved.
The Effect of Inorganic Fertilizer and Biofertilizer Applications on Some Quality and Biochemical Properties of Safflower (Carthamus Tinctorius L.)
(Centenary University, 2022) Yolci, M.S.; Tunçtürk, R.
This study was carried out in irrigated conditions during the summer growing season of 2020 and 2021 to determine the effects of biofertilizer applications and inorganic fertilization on some quality and biochemicals properties of safflower (Carthamus tinctorius L.) in Van ecological conditions. The experiment was set up as a randomized block design in 3 replicates at the Faculty of Agriculture, Van Yüzüncü Yıl University. The mixture of five different biofertilizers (Frateuria aurantia (B1), Bacillus megaterium (B2), Azospirillum lipoferum (B3), Chlorella saccharophilia (B4), and a mixture of Lactobacillus casei + Rhodopseudomonas palustris + Saccharomyces cerevisiae + Lactococcus lactis microorganisms (B5)) different NP (nitrogen+phosphorus) fertilizer doses (control, 100% NP (NP100) as full dose (optimum) 15 kg of pure nitrogen (Ammonium sulfate (21%) and 8 kg of pure phosphorus (TSP (42%)) per decare); % 7.5 kg of pure nitrogen (Ammonium sulfate (21%) and 4 kg of pure phosphorus (TSP (42%)) were applied as 50 NP (NP50) reduced dose per decare. Some quality and biochemical Parameters including petal yield, crude oil rate, crude oil yield, total dyestuff ratio, total phenolic substance content, total flavonoid substance content and total antioxidant activity were measured. According to the results of the research; In both experimental years, the best results for crude oil yield and petal yield were obtained from NP100 applications, while the best results for total flavonoid substance content and total antioxidant activity were obtained from NP0 applications. B4 biofertilizer applications for crude oil ratio, B1 biofertilizer applications for petal yield, and B5 biofertilizer applications for total phenolic content were the biofertilizer applications with the best results in both years. © 2022, Centenary University. All rights reserved.
Effect of Mycorrhiza Applications on Some Physiological and Macro-Micro Element Contents in Soybean (Glycine Max L.) Grown Under Salt Stress Condition
(Centenary University, 2025) Oral, E.; Tunçtürk, R.; Tunçtürk, M.; Nohutçu, L.; Şelem, E.
This study was carried out to determine the effects of mycorrhizal applications on some biochemical and macro/micro nutrient characteristics of soybean (Glycine max L.) under salt stress (0, 50, 100, 150, 200 mM NaCl). In the research investigated chlorophyll a (17.30-22.61 µg g-1 TA), chlorophyll b (3.05-5.78 µg g-1 TA), total chlorophyll (20.46-27.72 µg g-1 TA), carotenoids (3.57-4.72 µg g-1 TA), proline (0.43-1.81 µg g-1 TA), malondialdehyde (MDA) (13.1-18.3 nmol g-1), and several macro-and micro-elements, including Ca (9.43-12.8 g kg-1), K (9.97-11.8 g kg-1), Na (0.94-3.52 g kg-1), P (1.49-2.44 g kg-1), Mg (3.03-3.46 g kg-1), Zn (3.71-7.63 g kg-1), K/Na ratio (3.32-7.17%), Mn (23.6-56.5 g kg-1), Mo (0.81-1.26 g kg-1), Cu (0.76-1.78 g kg-1), As (2.17-5.26 g kg-1), Ni (0.99-1.97 g kg-1), Pb (0.07-0.12 g kg-1), Cd (0.06-0.13 g kg-1), Co (0.06-0.08 g kg-1) and Cr (0.78-1.48 g kg-1). As a result of the study; a decrease or an initialincrease followed bya decrease was observed inin chlorophyll a and b, total chlorophyll, carotenoids, P, Zn, K/Na, Ca/Na, Mn, Mo, Cu, As, Ni, Pb, Cd, Co and Cr contents in mycorrhiza-treated plants under salt stress. The levels of Ca, K and Na increased, while Mg levels remained statistically insignificant, following a fluctuating pattern.. Additionally, boron applications were found to increase the nitrogen balance index, MDA, flavonol, anthocyanin, antioxidant and phenolic contents. Overall, the study demonstrated that mycorrhiza applications have a beneficialand regulatory effect on the biochemical composition and macro/micro-element levels in soybean under salt stress. © 2025, Centenary University. All rights reserved.
The Effect of Plant Growth Promoting Rhizobacteria Applications on Some Growth Parameters and Physiological Properties of Marigold (Calendula Officinalis L.) Plant Grown Under Drought Stress Conditions
(Centenary University, 2021) Şelem, E.; Nohutçu, L.; Tunçtürk, R.; Tunçtürk, M.
Calendula officinalis L. species, which has an important place among medicinal plants, is used in the pharmacology, food, ornamental plant, and cosmetics industry. In recent studies, It is known that the usage areas of marigold have become increasingly widespread, but despite this widespread use, the species is quite limited of commercial production. Against drought stress, which is an important abiotic stress factor in agricultural production, BGUB (plant growth-promoting rhizobacteria) applications have come to the fore in order to minimize the decrease in yield and quality. In this study, it is aimed to determine the effects of PGPR (B0: Bacteria-free environment (control), B1; Azospirillum lipoferum, B2: Bacillus megaterium, B3: Chlorella saccharophila) applications on some growth parameters and physiological changes of C. officinalis plant grown under drought stress (normal irrigation (K1), reduced ½ (K2) ve reduced ¾ (K3)) conditions. The study was carried out in a controlled climate room with a temperature of 25o C and a humidity of 65% in a dark/light photoperiod of 8/16 hours. Seeds were sown on 28.05.2020 and were subjected to analysis of variance in randomized plot design and 3x4 factorial design. In this study, it is aimed to determine the effects of BGUKB (B0: Bacteria-free environment (control), B1; Azospirillum lipoferum, B2: Bacillus megaterium, B3: Chlorella saccharophila) applications on some growth parameters and physiological changes of C. officinalis plant grown under drought stress (normal irrigation (K1), reduced ½ (K2) ve reduced ¾ (K3)) conditions. Considering the parameters examined, drought applications were found to be statistically significant in terms of stem length (K1: 11.1 cm), root fresh (K1: 1.06 g) and dry (K1: 0.17 g) weight, stem fresh (K1: 7.26 g) weight, leaf area (K1: 7.81 cm2) and temperature (K3: 27.7o C), epidermal cell number (K1: 593.16 number/mm2 and all stomatal characteristics. In conclusion, bacteria applications showed a significant impact on some of the characters like stem length (B1: 11.0 cm), root fresh (B1: 0.89 g) weight, stem fresh (B1: 6.09 g) weight, epidermal cell number (B1: 672.88 number mm-2), stoma length (B1: 32.71 µ) and density (B1: 11.06 number (mm2). © 2021, Centenary University. All rights reserved.
Effect of Salt Stress on Some Growth and Physiological Parameters of Peanut (Arachis Hypogea L.) Varieties
(Centenary University, 2021) Yolcı, M.S.; Tunçtürk, R.; Tunçtürk, M.
In this study, the effects of salt stress (0, 100, 200 mM NaCl) on some growth and physiological parameters of peanut (Arachis hypogea L.) cultivars (Arıoğlu-2003 and Gazipaşa) were investigated. The experiment was carried out as a factorial experiment based on completely randomized design with 3 replicates under controlled growth chamber. As a result of the research; The effect of salt stress on shoot length, root fresh and dry weight was statistically insignificant. Increasing salt concentrations, while increasing ion leakage in leaf tissues, leaf temperature and malonyldialdehyde (MDA) level, it decreased other growth and physiological parameters. In the study; maximum root length (29.2 cm), shoot fresh weight (8.67 g), shoot dry weight (2.88 g), relative water content in leaf tissues (56.6%), membrane resistance index in leaf tissues (79.7%), leaf area (17.6%) and chlorophyll ratio (66.3) were obtained from control (0 mM NaCl) applications, while the highest ion leakage in leaf tissues (61.4%), leaf temperature (19.3 0C) and MDA level (0.464 nmol g-1) were determined from 200 mM NaCl applications. In addition, statistically significant differences were found among the varieties on other parameters except shoot length, root fresh and dry weight, and it was determined that Gazipaşa peanut variety was partially more resistant to salt stress than Arıoğlu-2003 variety. © 2021, Centenary University. All rights reserved.
Effect of Seaweed on Growth Parameters, Total Phenolic and Antioxidant Substance in Echinacea (Echinacea Purpurea L.) Under Drought Stress
(Centenary University, 2019) Bat, M.; Tunçtürk, R.; Tunçtürk, M.
This study was carried out to determine the effects on biochemical changes with growth parameters of seaweed (Ascophyllum nodosum) extract applications (control, 2, 4 and 6 cc l-1) and drought stress at the different osmotic pressure (control,-0.5 MPa,-1.0 MPa and-1.5 MPa) generated by PEG 6 000 in echinacea. In this study, root length, shoot length, root and shoot fresh weight, root and shoot dry weight, total antioxidant and total phenolic content of echinacea plant were investigated. As a result of the research; it was decreased the root fresh and dry weight, shoot fresh and dry weight, root and shoot length of drought stress. It was determined caused to increase total antioxidant substance amount. Drought stress did not have a significant effect on total phenolic content. It has been reduced with seaweed applications the negative effects on the plant of drought stress. It has been positive and increasing the effects on examined parameters such as root length, shoot length, root and shoot fresh weight, root and shoot dry weight of seaweed applications while seaweed application did not affect at the significant level as statistically total antioxidant and the phenolic substance amount. © 2019, Centenary University. All rights reserved.
The Effect of Some Endophytic Bacteria on Seedling Growth and Physiological Properties of Salvia Officinalis L
(Centenary University, 2023) Uçar, C.P.; Selem, E.; Tunçtürk, R.; Tunçtürk, M.; Akköprü, A.
In order to meet the demand for medicinal sage (Salvia officinalis L.), which is an important economic product, harvesting from nature has economic value. However, it may not always be of the desired standard and quality. Also, the harvesting from nature endangers their natural population causing their genetic base to decline. For this reason, it is important to produce it in an agrosystem and to increase yield in a sustainable way. In this study, the effects of eleven endophyte bacteria (EB) isolates applications on the development, morphology, and physicochemical properties of Salvia officinalis L. were investigated by climate chamber experiments. Peat+perlite+soil (1:1:2) mixture was used as the growing medium and EB was applied two times by soaking method. Effects of EB applications on shoot/root length, root/stem fresh and dry weight, Dualex values (Nitrogen balance index (NBI), flavonol, anthocyanin, and chlorophyll), leaf area, leaf temperature and color values (L*, a) *, b * C and Hue° were examined. All EB applications increased the plant height and leaf area. Also, the majority of EB isolates enhanced the root dry weight. The effect of EB applications on flavonol and chlorophyll content was not found statistically significant. However, there was a statistically significant increase in the nitrogen balance index (NBI). It was also observed that EB applications caused changes in plant color. According to the results obtained, it has been seen that it is possible to produce environmentally friendly and sustainable medicinal sage with appropriate plant-bacteria combinations. © 2023, Centenary University. All rights reserved.
The Effects of Glomus Intraradices on Seedling Growth Parameters of Sage (Salvia Officinalis L.) Under Salinity Stress Conditions
(Association of Agricultural Technology in Southeast Asia, 2024) Tunçtürk, R.; Tunçtürk, M.; Danesh, R.Y.; Najafi, S.; Toprak, T.
Salinity is a significant abiotic stress that adversely affects plant growth and development, threatening global agricultural productivity, particularly in arid and semi-arid regions. Results indicated that increasing salt concentrations significantly inhibited seedling growth in all studied parameters, with control plants (0 mM) exhibiting the highest growth values. The tallest plants measured 23.16 cm in the control treatment, while those exposed to 200 mM salt reached only 13.12 cm. Although AMF applications did not show significant effects on plant height, they positively influenced growth parameters in salt-free conditions. Statistical analysis revealed significant interactions between salt levels and AMF on root fresh and dry weights, with the highest values recorded in the control group. Furthermore, AMF applications generally promoted growth, particularly in non-saline conditions, corroborating findings from previous research highlighting mycorrhizae's role in enhancing plant stress tolerance. In conclusion, the research findings emphasize the detrimental impact of salinity on plant development and the potential of mycorrhizal inoculation as a strategy to mitigate these effects. These findings contribute to understanding the beneficial role of AMF in improving salt tolerance and promoting sustainable agricultural practices in saline-prone environments. © 2024 Association of Agricultural Technology in Southeast Asia. All rights reserved.
Tuzluluk Stresi Koşullarında Yetiştirilen Soya (Glycine Max L.) Bitkisinde Bazı Fizyolojik ve Biyokimyasal Değişimler Üzerine Salisilik Asit Uygulamalarının Etkileri
(Ege Universitesi, 2023) Havva Kurt, C.; Tunçtürk, M.; Tunçtürk, R.
Objective: The objective of this study was to observe the morphological and biochemical changes of salicylic acid in soybean grown under salinity stress. Material and Methods: The study was carried out in climate room of Van Yuzuncu Yil University, Faculty of Agriculture, Department of Field Crops in 2019. The “Ilksoy” soybean variety was used in the study. Four different salisilic acid doses (0, 0.5, 1 and 1.5 mM) and 3 different NaCl salt doses (0, 150 and 300 mM) were applied. Plant releated properties such as root - stem length, root -stem fresh weight, root - stem dry weight, leaf area, chlorophyll content, ion leakage in leaf tissues (ILLT), lipid peroxidation level (MDA), relative water content (RWC) and membrane resistance in leaf tissues (MRLT) were determined. Results and Conclusions:It was observed that as the salt doses increased, the stem fresh weight of the soybean plants decreased, and the lowest value was obtained from 1.26 g and 300 mM salt concentration. The highest MDA content (0.75 nmolg-1 FW) and the lowest chlorophyll content (39.46 SPAD) were obtained when the 300 mM NaCl dose was applied. From the study conducted, the stem length, root, stem fresh and dry weights, RWC, MRLT, leaf area and chlorophyll ratio decreased with salt stress applications while the MDA and ILLT values increased. In addition, the longest roots were detected in 150 mM salt applications as compared to the control. © 2023 Authors. All rights reserved.