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
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Дата
2016-10
Назва журналу
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Видавець
SciPress Ltd.
Анотація
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.
Опис
Research paper
Ключові слова
woody plant undergrowth, stem histological indices, toxic gases, planting
Бібліографічний опис
T. Iusypiva and G. Miasoid, "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", International Letters of Natural Sciences, Vol. 59, pp. 62-71, 2016