Plant Science, Ecology, Evolution, Behavior and Systematics, Ecology, Agricultural and Biological Sciences
4
Scopus Publications
Scopus Publications
Comparative phytochemical and GC-MS analysis of leaves, stems, and roots of Euphorbia yaroslavii Poljakov. A. Ametov, M. Dauletbayeva, M. Aytzhanova, Z. Rakhimova, A. Sarsembayeva, U. Erezhetova, Zh. Turgara, G. Bolatbekova, A. Bekenova, G. Assan Brazilian Journal of Biology, 2026 Euphorbia yaroslavii Poljakov. is a rare plant species endemic to Kazakhstan whose phytochemical composition has remained largely unexplored. This study presents the first organ-specific phytochemical and GC-MS characterization of the leaves, stems, and roots of this species. Quantitative analyses indicated pronounced metabolic differentiation among plant organs. Roots were characterized by high contents of total phenolics (58.2 ± 2.5 mg GAE/g DW), coumarins (2.48%), and mineral components (total ash 13.22%), while leaves exhibited the highest tannin content (2.35%). The maximum flavonoid content was observed in roots (0.27%), whereas stems contained the highest level of ascorbic acid (0.70 mg/g DW). GC-MS profiling tentatively identified 68 compounds in leaf extracts, 65 in stem extracts, and 39 in root extracts. Root extracts were dominated by fatty acids and triterpenoid-sterol constituents, including octadecanoic acid (18.9%), hexadecanoic acid (17.5%), β-amyrin (5.2%), and lanosterol (4.9%). Overall, the results indicate organ-specific metabolic specialization in Euphorbia yaroslavii Poljakov. and provide a reliable phytochemical baseline for future bioactivity-oriented and conservation-related studies.
Soil properties drive population abundance of the rare, endemic Euphorbia yaroslavii in the Zailiyskiy Alatau, Kazakhstan ZHANSAYA ТURGARA, А. А. Амetov, Kanat Kulymbet, Assel Childibayeva, SALTANAT NAZARBEKOVA, et al. Biodiversitas, 2025 Abstract. ?urgara Z, Ametov A, Kulymbet K, Childibayeva A, Nazarbekova S, Ryskali T, Erezhetova U, Tastanbekova A. 2025. Soil properties drive population abundance of the rare, endemic Euphorbia yaroslavii in the Zailiyskiy Alatau, Kazakhstan. Biodiversitas 26: 5881-5890. This study investigates the ecological and soil-chemical factors influencing the population abundance of the rare herbaceous perennial geophyte Euphorbia yaroslavii in the Zailiyskiy Alatau Mountains, Southeastern Kazakhstan. Field surveys were conducted across three gorges - Ushkonyr, Shamalgan, and Kaskelen - comprising nine cenopopulations. A total of 337 individuals were recorded, with the highest abundance observed in Ushkonyr (188 individuals) and the lowest in Kaskelen (56 individuals). Soil texture, structure, and chemistry were analyzed in detail, including granulometry, humus content, pH, CO?, available N, P?O?, K?O, exchangeable cations (Ca²?, Mg²?, Na?, K?), and total soluble salts. Pearson correlation analysis revealed very strong positive correlations between population abundance and sand (r = +0.95), clay (r = +0.87), humus (r = +0.80), mobile nitrogen (r = +0.93), and with exchangeable magnesium among key base cations (r = +0.92). A strong negative correlation was found with silt content (r = -0.88), indicating that excess silt may limit aeration. Correlations were computed at the cenopopulation level (n = 9), pairing abundance with co-located soil measurements from the 0-20 cm layer. The most favorable soil conditions for E. yaroslavii are loamy calcareous soils with 40-50% sand, 20-30% clay, slightly alkaline pH (7.4-7.9), humus ? 2.5%, and high base saturation with dominance of Ca²? and Mg²?. These findings suggest that population abundance is primarily determined by soil texture and organic matter, with magnesium acting as an important component of an overall balanced base-cation regime. Sites meeting these criteria should be prioritized for in situ conservation and habitat restoration, with recommended practices including organic amendment and liming to improve soil fertility and structure.
Photosynthetic activity of triticum dicoccum × triticum aestivum alloplasmic lines during vegetation in connection with productivity traits under varying moister conditions N.V. TERLETSKAYA, V.YU. STUPKO, N.A. ALTAYEVA, N.O. KUDRINA, I.V. BLAVACHINSKAYA, M.S. KURMANBAYEVA, U. EREZHETOVA Photosynthetica, 2021 Drought is a key stressor under global climate change conditions around the world. Triticum dicoccum Shuebl is a species with high potential drought tolerance. Photosynthesis is the primary physiological process affected by water deficit. Rapid light curves (RLCs), recorded using PAM-fluorometers, appear suitable for drought tolerance determination in breeding material. Chlorophyll fluorescence parameters at different vegetation stages, morphophysiological traits, and their relationship with the productivity were analyzed in nine alloplasmic lines (allolines) of T. dicoccum Shuebl Ă T. aestivum L. partially exposed to drought conditions. Quantum yield parameters at the beginning of RLC at the early vegetation stages correlated with the productivity of investigated lines. Parameters related to photosynthetic capacity had a stronger correlation with the productivity at the stages of subflag and flag formation. For drought tolerance screening, quantum yield of nonorganized energy passive dissipation is particularly promising. Chlorophyll fluorescence and productivity data confirm the potential of the presented breeding strategy in allolines D-d-05 and D-d-05b.
Some mechanisms modulating the root growth of various wheat species under osmotic-stress conditions Nina V. Terletskaya, Tamara E. Lee, Nazira A. Altayeva, Nataliya O. Kudrina, Irina V. Blavachinskaya, Ulzhan Erezhetova Plants, 2020 The role of the root in water supply and plant viability is especially important if plants are subjected to stress at the juvenile stage. This article describes the study of morphophysiological and cytological responses, as well as elements of the anatomical structure of primary roots of three wheat species, Triticum monococcum L., Triticum dicoccum Shuebl., and Triticum aestivum L., to osmotic stress. It was shown that the degree of plasticity of root morphology in water deficit affected the growth and development of aboveground organs. It was found that in conditions of osmotic stress, the anatomical root modulations were species-specific. In control conditions the increase in absolute values of root diameter was reduced with the increase in the ploidy of wheat species. Species-specific cytological responses to water deficit of apical meristem cells were also shown. The development of plasmolysis, interpreted as a symptom of reduced viability apical meristem cells, was revealed. A significant increase in enzymatic activity of superoxide dismutase under osmotic stress was found to be one of the mechanisms that could facilitate root elongation in adverse conditions. The tetraploid species T. dicoccum Shuebl. were confirmed as a source of traits of drought tolerant primary root system for crosses with wheat cultivars.
