Перегляд за Автор "Iusypiva, Tetiana"

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  • Ескіз
    Документ
    The Impact of Industrial Pollution with Toxic Gases on Stem Histological Parameters of Woody Plant Undergrowth under Conditions of the Southern Industrial Zone of the City of Dnipro, Ukraine
    (SciPress Ltd., 2016-10) Iusypiva, Tetiana; Miasoid, Galyna; М'ясоїд, Галина Іванівна
    The paper examines the influence of industrial emissions of sulphur (IV) and nitrogen (IV) oxides (the southern industrial zone of the city of Dnipro) on stem histological parameters of the autochthonous woody plant species undergrowth of Acer platanoides L. and Fraxinus excelsior L., which are natural forest edificators in the steppe zone of Ukraine. It shows that stem anatomical characteristics undergo quantitative changes in the annual undergrowth shoots of the two tree species under anthropogenic burden, with the most significant changes in the area of heavy pollution. Results indicate the decrease of such stem parameters as stem and stele diameters, wood radius and primary cortex thickness under high concentrations of SO2 and NO2 in seedlings of both species. However, this parameter drops in A. platanoides stems by reducing the collenchyme width, whereas it goes down in F. excelsior stems due to cork thickness loss. Another difference in the response of A. platanoides to the influence of phytotoxic pollutants compared to F. excelsior is the depletion of conducting elements of its phloem, which results in thinning the secondary cortex of the stem. The research findings prove high vulnerability of A. platanoides undergrowth to the chronic exposure of SO2 and NO2. Therefore, this woody species is suggested to be used as a test object in monitoring research on plants of virginal group in the technogenic areas contaminated with sulphur (IV) and nitrogen (IV) oxides.
  • Ескіз
    Документ
    The Impact of SO2 and NO2 Industrial Emissions on Anatomical Stem of Salix alba
    (SciPress Ltd., 2016-02) Iusypiva, Tetiana; Miasoid, Galyna; М'ясоїд, Галина Іванівна
    The paper examines the influence of industrial emissions SO2 and NO2 on the anatomical structure of the annual shoot stems of Salix alba L. in conditions of steppe zone of Ukraine. It reveals high stability of histological characteristics of the studied type to phytotoxic pollutants, which was proved by thickening of almost all anatomical stem parameters. It was ascertained the toxic gases chronic effect results in increasing the thickness of the stem cortex in the research object through the increase of the primary cortex where collenchyme and parenchyma grow thicker, and through thickening the secondary cortex as hard bast indices rise. The study proved that toxic gases do not affect the wood radius and pith diameter, though the biggest trachea diameter increases significantly. It has shown the thickening of both primary cortex and secondary bast which contribute to the change of that the diameter of annual shoot stems of S. alba in conditions of technogenesis. The high adaptive capacity of anatomical indicators of this his plant species stem to industrial pollution has been demonstrated, and therefore it was suggested that S. alba can be used for planting the areas subject to chronic actions SO2 and NO2.