Жарияланымдар / Публикации

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ВЛИЯНИЕ ТЯЖЕЛЫХ МЕТАЛЛОВ (CD, CU, ZN) НА НАКОПЛЕНИЕ БИОМАССЫ СОРТОВ РИСА ТИТАН, АЙСАУЛЕ
(2021-03-21)
K.N. ZHAILYBAY
;
А. Жарқынбек
;
Didar Zamanbekovna Abilmazhinova
Heavy metals accumulation in a plant results in negative effect on physiological and biochemical processes going on in an organism. In this respect, the present article considers particular features of heavy metals (Cadmium - Cd, Cuprum - Cu, Zinc - Zn) on biomass accumulation by rice cultivars. Increase in heavy metals content results in significant slowing down the biomass accumulation in rice cultivars in the beginning of vegetation. Cadmium exerts significantly greater influence on biomass accumulation by Titan and AiSaule rice cultivars as compared to copper and zinc. Effect of heavy metals on biomass accumulation by rice cultivars is in the following order: cadmium> copper> zinc.
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Soil morphological and chemical characteristics in the habitats of the rare, endemic plant Spiraeanthus schrenkianus in Karatau Mountains, Kazakhstan
(Instituto Internacional de Ecologia (Brazil), 2025-01-01)
A Muratbayeva
;
Akmaral Nurmahanova
;
Канат Кулымбет
;
A. T. Myltykbayeva
;
Aigul Аkhmetova
BACKGROUND: The article presents the results of the study of ecological characteristics of soils of three populations on the territory of Karatau. The populations were located in different geographical points with differences in soil types, depth of horizons and content of chemical elements. The study evaluated the main soil parameters including humus content, pH, CO2, macro- and microelements, and salinity level. It was found that population-1 (mountain gray-brown soils) was characterized by the highest content of humus and mobile nitrogen, indicating better availability of nutrients to plants. population-2 (mountain southern serozems) has higher potassium content, which is favourable for plant growth. population-3 (mountain gray-brown soils) showed the lowest content of mobile phosphorus and copper compared to other populations. Analysis of heavy metal concentrations showed that zinc exceeded the maximum permissible concentration only in population-2. At the same time, soil salinization at all three sites remains at a low level and does not pose a threat to the ecosystem. These findings are ecologically significant as they reveal the critical role of soil fertility and contamination in supporting the distribution and survival of the rare endemic species Spiraeanthus schrenkianus. These results provide new information for assessing the fertility and sustainability of land resources.
Цитирования (OpenAlex) 4Цитирования (OpenCitations) 1
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ASSESSMENT OF THE INFLUENCE OF THUJA OCCIDENTALIS L. AND PLATYCLADUS ORIENTALIS L. SPECIES ON THE ECOLOGICAL COMPOSITION OF SOILS IN ALMATY CONDITIONS
(Al-Farabi Kazakh National University, 2025-03-30)
Nurgul Yerezhepova
;
Kanat Qulymbet
;
Ainur Yerezhepova
Most of the pollutants from the atmosphere of the urbanised area get into the soil. Due to the increase in population and motor transport in Almaty city there is a high level of atmospheric air pollution, increased content of heavy metals in the soil. Accumulation of heavy metals by green trees from the soil positively affects soil conditions, in this regard, it is relevant to assess the current state of soil cover of regions where Thuja occidentalis L. and Platycladus orientalis L. trees grow. In the article, to determine the influence of western and eastern thuja trees on soil composition, soil were obtained with coordinates at point 2 and control point, where trees of thuja species grew side by side. Total and mobile content of heavy metals in soil (Cu, Zn, Mn, Fe) were determined by atomic absorption spectrometry. Morphological characterisation of the soil cover was made, granulometric composition and soil types were determined by the Tyurin method. Point 1 Thuja occidentalis L. humus content in soil cuttings on which the tree was growing showed maximum content of 3.82% in 0-10 cm, while Platycladus orientalis L. when growing the humus content is low 1.86%, the soil in point 2 opposite Platycladus orientalis L. humus content of 2.96% when growing Thuja occidentalis L. (2.14%) has a higher humus content compared to the augmented soil. Thuja occidentalis L. and Platycladus orientalis L. in the control, where the species grew together, the humus content is 3.1%. the pH value ranged from 8.26 to 8.81, with soil cuttings generally showing a strong alkaline environment. Among the heavy metals, Zn, Cu and Fe were found to be significantly above the MAC in the soil, meaning that the soils of the study area were contaminated with heavy metals. At profile 1, the soil on which western thuja grew has less amount of Zn, Cu, Mn, Fe compared to the soil on which eastern thuja grew, Mn- and others are above MAC. At profile 3, only the Fe size of Platycladus orientalis L. is higher in the overgrown soil. Thuja occidentalis L. and Platycladus orientalis L. where the species grew together, the amount of Mn decreased by 452.2µg/kg. The study showed that the accumulation of heavy metals in the soil decreased when growing the western thuja species compared to the eastern thuja species. Keywords: Thuja, soil cover, granulometric composition, humus, heavy metals, MPC
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THE EFFECT OF PSEUDOMONAS BACTERIA ON THE ANTIOXIDANT SYSTEM OF PLANTS UNDER CONDITIONS OF HEAVY METAL CONTAMINATION
(2026-01-01)
А.А. Ramazanova
;
Gulzira Izmukhanovna Yernazarova
;
Sana Kabdrakhmanova
;
Khaiyrnisa Aisakulova
;
А.А. Kulbekova
This study investigated changes in the antioxidant system of Phaseolus vulgaris plants grown in a medium contaminated with heavy metals (Cu, Cd, Zn) and Pseudomonas spp., with the aim of evaluating the bioremediation effect of the bacterial consortium. The results showed that in the control group, antioxidant activity was 25% in the roots, 24% in the leaves, and 27% in the stems. Upon exposure to copper (Cu 0.01), these values increased significantly to 59%, 56%, and 57%, respectively, indicating activation of the antioxidant system in response to severe oxidative stress. When the copper concentration was reduced (Cu 0.001), antioxidant activity decreased to 14% in roots, 11% in leaves, and 18% in stems. In the case of cadmium (Cd 0.01), the values were 19%, 15%, and 18%, whereas in the Cd 0.001 treatment, an increase to 25% in leaves and 31% in stems was observed. Antioxidant activity decreased under zinc (Zn 0.01) exposure and amounted to 11% in roots, 4% in leaves, and 14% in stems, while the lowest values were recorded at Zn 0.001 (3%; 1.73%; 8%). The use of the Pseudomonas spp. consortium increased plant resistance to heavy metals and contributed to the stabilization of the antioxidant system. Overall, the results demonstrate that these bacteria can be used as an effective bioremediation agent by biosorbing heavy metal ions and reducing oxidative stress in plants.

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