Жарияланымдар / Публикации

Постоянный URI для этого сообществаhttps://cris.qyzpu.edu.kz/handle/123456789/2

Просмотр

Фильтры

2025 - 20263

Настройки

Тип доступа: НеизвестноТема: search.filters.subject.plant conservation

Результаты поиска

Показано: 1 - 3 из 3
  • Загрузка...
    Изображение-миниатюра
    Некоторые метрики заблокированы вашими 
    настройками согласия
    Тип записи:Публикация,
    Assessment of Vegetation and Soil Characteristics of Calligonum Leucocladum Populations in the Balkhash Region, Kazakhstan
    (2025-02-10)
    Alibek Ydyrys
    ;
    Мaral Mussina
    ;
    Saltanat Nazarbekova
    ;
    Bektemir B. Osmonali
    ;
    Raushan Dossymbekova
  • Загрузка...
    Изображение-миниатюра
    Некоторые метрики заблокированы вашими 
    настройками согласия
    Тип записи:Публикация,
    ASSESSMENT OF THE CURRENT STATE OF THE POPULATION OF THE SPECIES RHEUM WITTROCKII LUNDSTR. FLORA OF THE SOUTH-EAST OF KAZAKHSTAN
    (Al-Farabi Kazakh National University, 2025-12-30)
    Gulbanu Aueskhanovna Sadyrova
    ;
    Kuralai Orazbekova
    ;
    Marzhankul Dauletbayeva
    ;
    Ainur Tanybayeva
    ;
    Bayan Tussupova
    This article is devoted to the study of the current state of the Rheum wittrockii Lundstr. species population, floristic composition and ecological characteristics of this species populations in the Uzynkara and Ile-Alatau ridges, Almaty region. Rheum wittrockii Lundstr., an ancient genus of the Neogene period of Asian origin, includes 9 species in Kazakhstan. Three natural populations of Rheum wittrockii Lundstr. were studied in various ecological and phytocenotic conditions of the Uzynkara and Ile-Alatau ridges. Rheum wittrockii in the studied areas are distributed in the middle part of the forest belt of mid-mountains where they exhibit high adaptive abilities, which indicate their ecological plasticity, are characterized by high rates of seed and vegetative reproduction, are resistant to diseases, retain a characteristic habitus in culture, are highly decorative and can be recommended for use in landscaping. In most populations of Rheum wittrockii, generative and virginal individuals prevailed, less often pregenerative individuals played the main role in the population. As a result of the monitoring, the population size in the studied area has been rapidly declining in recent decades, which requires necessary measures to preserve and restore the population size of Rheum wittrockii Lundstr. species in the studied area. To maintain and ensure normal life of Rheum wittrockii Lundstr. populations in the studied areas, it is necessary to standardize the degree of anthropogenic impacts. The main anthropogenic threats to the rare species Rheum wittrockii Lundstr. are overgrazing, habitat disturbance, which have led to a reduction in populations, which will require conservation strategies such as habitat monitoring. Keywords: natural populations, plant communities, rare species, Uzynkara. Ile Alatau
  • Загрузка...
    Изображение-миниатюра
    Некоторые метрики заблокированы вашими 
    настройками согласия
    Тип записи:Публикация,
    Comparative phytochemical and GC-MS analysis of leaves, stems, and roots of Euphorbia yaroslavii Poljakov.
    (Instituto Internacional de Ecologia (Brazil), 2026-01-01)
    Abibulla Ametov
    ;
    Marzhankul Dauletbayeva
    ;
    М.О. Айтжанова
    ;
    Zaida Rakhimova
    ;
    Sarsembayeva Aiman
    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.