Oleksandr Polishchuk

Oleksandr Polishchuk
M.G.Kholodny Botany Institute · Membranology and phytochemistry department

PhD

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23
Publications
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46
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Publications

Publications (23)
Article
The article surveys multiple roles of carbonic anhydrases (CAs) in inorganic carbon (Ci) acquisition by cyanobacteria, microalgae, and macrophytes under Ci limiting conditions. Slow Ci diffusion in aquatic environments imposes the need for carbon concentrating mechanisms (also named CO2 concentrating mechanisms, CCMs) in aquatic photoautotrophs to...
Article
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The river basin of Siversky Donets is of great scientific interest since this river runs through a territory with heavy industry (in particular, coal mining, chemical processing and metal industries). Within the basin, rivers of different sizes were explored (small, medium, large and extra-large) that flow through siliceous and calcareous rocks on...
Article
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A correction to this paper has been published: https://doi.org/10.1007/s00425-021-03591-7
Article
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The frequency of extreme heat effects has recently increased in European cities due to climate change. The problem appears to be critical in urban areas where manmade structures significantly alter the temperature balance, thus highlighting the importance of sustainable management and proper inventory of urban green zones. Based on this, the paper...
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The data on stress-related changes in the expression and activity of plant carbonic anhydrases (CAs) suggest that they are generally upregulated at moderate stress severity. This indicates probable involvement of CAs in adaptation to drought, high salinity, heat, high light, Ci deficit, and excess bicarbonate. The changes in CA levels under cold st...
Article
The effect of different cultivation methods on the content of ganoderic acids of 7 species, 10 strains of the Ganoderma genus (Ganoderma applanatum 1899; Ganoderma сarnosum 2502; Ganoderma lucidum 1904; Ganoderma resinaceum 2477, 2503; Ganoderma sinense 2516; Ganoderma tsugae 1848, 2024, 2566, Ganoderma oregonense 2560) genus fungi from the IBK Mus...
Article
Operation of the indicators for the reliable regional carbon dioxide content in atmosphere is the important factor for the computer simulation of climatic changes at the appropriate scale. A goal is the experimental study of the processes for carbon dioxide gas exchange (photosynthesis and respiration) of wetland vegetation for the forest-steppe zo...
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We analyzed chloroplast ultrastructure, microstructure of fronds surfaces, pigment`s content and efficient use of light by photosynthetic apparatus in floating and submerged fronds of water fern Salvinia natans at different stages of development. In parenchymal cells of floating fronds average chloroplast cross-section area at intensive growth stag...
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The characteristics of photosynthetic pigments and efficient use of light energy are analyzed fon the example of chloroplast ultrastructure of the photosynthetic apparatus of floating and submerged fronds of annual heterosporous of water fern Salvinia natans (L.) All. in ontogenesis. It is established that at the stage of intensive growth chloropla...
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The ultrastructure and functional parameters of the photosynthetic apparatus in leaves of 14-day-old pea seedlings were studied in conditions of laboratory simulated acid rain (SAR). Pea seedlings were sprayed with an aqueous solution containing NaNO3 (0.2 mM) and Na2SO4 (0.2 mM) (pH 5.6, a control variant), or with the same solution, which was aci...
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The research aimed an estimation of the seasonal carbon fluxes (March – October) and analysis of the potential impact of altered precipitation on these fluxes in dry grasslands of South-Eastern Crimea. Calculations are based on the field data of CO2 fluxes (gross ecosystem productivity (GEP), net ecosystem exchange (NEE), ecosystem respiration (ER)...
Chapter
Cd2+, Zn2+ and Cu2+ have expressed effect on QB protonation and reduction in bacterial reaction centers (BRC) (Utschig et al., 2001). This work is dedicated to investigating influence of Cd2+, Pb2+, Hg2+, Zn2+, and Cu2+ at the level of acceptor side of photosystem II (PS II). Light-dependent proton uptake decreased in the presence of 80 μM Cu2+ by...
Article
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In most living organisms gravity perception is based on the response of the gravisensing system to displacement of specific mass induced by a gravitational force The amyloplasts in higher plants are known to play the important role as the specific mass in gravisensing cells As was shown by Kuznetsov Hasenstein 1996 the high-gradient magnetic field...
Article
As it was demonstrated by Kuznetsov & Hasenstein (1996) the high gradient magnetic field (HGMF) can produce a ponderomotive force that results in displacements of amyloplasts and causes the root response similar to the graviresponse. It was suggested that the HGMF could allow to imitate the effects of gravity in microgravity and/or change them in l...
Article
The upper sides of roots oriented horizontally grow more rapidly than the lower sides, causing the root ultimately to grow downward; this phenomenon is known as positive gravitropism. This ability is based on implicit mechanism which is being extensively investigated. Elaborate analysis of kinetic features of gravicurvature may complement the inves...

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Projects (2)
Project
The aim of the project is to develop the reliable methodology for assessment of water pollutants in rivers and lakes by measurement of spectral properties of water and aquatic vegetation from UAVs and satellites This research is a part of ERA-PLANET project funded by Horison 2020 framework program