Browsing by Author "Tuncturk, Rueveyde"

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Determination of Morphological and Quality Characteristics of Naturally Growing Thymus Kotschyanus Boiss. & Hohen. Var. Kotschyanus Populations Around of Van/Türkiye
(Mdpi, 2025) Nohutcu, Lutfi; Tuncturk, Murat; Tuncturk, Rueveyde; Selem, Ezelhan; Eroglu, Huseyin
In this study, morphological and quality characteristics (nutritional value, EO ratio and content, TPC, TFC, and TAA) of 12 different naturally growing populations (T1 to T12) of Thymus kotschyanus var. kotschyanus were investigated. In the case of macro and micro nutrients, all the populations have a rich ingredient, and for heavy metal content, all population results are within limits. The percentage of essential oils in the population varied between 0.43% to 4.66% (v/w). Thymol was the most abundant compound in the whole population and the percentage of thymol ranged from 4.07% to 81.15%. In the study, eight populations had more than 50% thymol content and the maximum percentage was recorded from the T1 population (81.15%). The total phenolic compound ranged from 152.81 to 195.23 mg GAE/g of dry extract and total flavonoid content ranged from 145.24 to 382.74 mg QE/100 g. Total antioxidant activity varies between 78.43 and 228.55 mu mol TE/g and the highest value was obtained from population T7. PCA analysis was carried out to determine the morphological and quality parameters of the populations. Four populations were superior to others for morphological analysis and two populations were superior to others for quality analysis. According to the result of the study, the T10 population has higher yield and quality compared to other populations.
Effect of Salinity Stress on Plant Green Weight and Nutrient Value of Soybean (Glycine Max (L.) Merrill) Cultivars
(Asian Journal of Chemistry, 2009) Tuncturk, Murat; Yasar, Fikret; Tuncturk, Rueveyde
Soil salinity is a major limitation to crop production in many areas of the world. A pot experiment was carried out with soybean cultivars to investigate the effects of salinity stress on plants growth and nutrient composition at 150 mM NaCl concentration under greenhouse conditions. Twelve soybean cultivars were exposed to salinity treatments (0 and 150 mM NaCl and control). All cultivars were harvested 45 d after plantation. Green parts of 45-day old plant weights were recorded. Soybean cultivar plants were divided into root, shoot and leaf parts for nutrient (K+, Na+, Ca2+ and Cl-) content measurements. Salinity stress negatively affected soybean cultivars and the effects varied according to the salt tolerance of the cultivars. Generally, salinity reduced the green weight. Salt stress decreased K+, Ca2+, contents and K+/Na+ rations in plants, but significantly increased Na+ and Cl- content in the roots. shoots and leaves of all cultivars. In the salt treatment, K+, Ca2+, concentration and K+/Na+ rations were high in leaf compared with those in roots and shoots. Howover, the highest increase in Na+ and Cl- contents were observed in the roots and shoot of plants. Under salinity, Mancon, Stresland and. Althow varieties retained the highest K+ and Ca2+ content in leaves, related to K+ the varieties were not effected under 150 Mm NaCl treatment.