Актуальні проблеми ботаніки та екології

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    (К.: Фітосоціоцентр, 2013)
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    Investigation of photosynthetic inactive suspension in some algae cultures at growth and under different illumination
    (К.: Фітосоціоцентр, 2013) Solomonova, E. S.; Akimov, A. I.
    The volume fraction of photosynthetic inactive suspension (PIS) under favorable growth conditions is 1-2% of the total biomass of algae species with rigid silicon - or cellulose membrane (Ph. tricornutum and Ch. vulgaris suboblonga), and does not exceed 0.5% of the populations of cells Is. Galban with cytoplasmic membrane. In the stationary phase of growth, as well as at high light intensities, the percentage of PIS is increased to 10-20% in Ch. vulgaris suboblonga and Ph. Tricornutum cultures. Increasing of PIS fraction is shown in the long-term steady-state, probably due to the high density of the culture, and not to the deficit of mineral nutrition. The particle size of PIS (Ph. tricornutum) widely varies, from a value exceeding the size of the cells to particles of less than 1 mkm3.
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    Influence of the nitrogen concentration in the medium on the maximum growth rate and C/Chl a ratio in Phaeodactylum tricornutum Bohlin
    (К.: Фітосоціоцентр, 2013) Shoman, N. Y.
    Decreasing of the nitrogen content in the original medium from 12 to 0.07 mg/L has no effect on the maximum growth rate and the C / Chl ratio, but it determines the maximum possible biomass of algae. The final density of the culture depends linearly from the initial concentration of nitrogen in the medium. Algal growth stops when the nitrogen content in the water reaches zero.
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    Dynamics of the biochemical composition in microalgal cells under growth on light-dark period
    (К.: Фітосоціоцентр, 2013) Novikova, Т. М.; Trenkenshu, R. P.
    The mathematical model allowing predicting the dynamics of protein, carbohydrates and lipids content on the pre-exponential and exponential growth phases of batch cultures of microalgae was developed. The point of developed model is to divide the synthesis processes of structural and reserved forms of proteins, carbohydrates and lipids, presented in a cell. The model is a system of differential equations that describes the synthesis and transformation of biochemical components in a cell. Solution of the obtained equations system allows to describe quantitatively the dynamics of changes in the biochemical composition of microalgae cells in batch culture.
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    Dynamics of extracellular and intracellular carbohydrates during growth of Porphyridium purpureum
    (К.: Фітосоціоцентр, 2013) Novikova, Т. М.; Kharchuk, I. A.
    The dynamics of the extracellular and intracellular carbohydrates in batch culture during Porphyridium purpureum growth was investigated. It was found that of reserve intracellular carbohydrates was 2-4% of the dry weight. The content of structural carbohydrates in the linear growth stage was 4-5% of the dry weight of cells, and it was 8.5% in the stationary growth phase. The maximum amount of extracellular carbohydrates in the culture medium was registered in mid-log growth phase of Porphyridium purpureum cells.
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    Influence of light on some of the structural and functional characteristics of the Black Sea dinoflagellates
    (К.: Фітосоціоцентр, 2013) Mansurova, I. M.
    Influence of light on some of the structural and functional characteristics of the Black Sea dinoflagellates was studied. It was found that the algal cultures reached the maximum growth rate at different illumination levels from 55 to 170 μmol m-2⋅s-1. At low light an increase of chlorophyll a in the microalgae cells and a decrease in their volume were observed. It was a slight reducing of the atomic ratio between nitrogen and organic carbon with increasing the intensity of the light.
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    Cellular quota of organic substance and of chlorophyll a isometric dependence
    (К.: Фітосоціоцентр, 2013) Kozhemyaka, A. B.
    Cellular quota of organic substance (mоs, pg/cell) on quota of chlorophyll a (mchla, pg/cell) isometric dependences have been obtained for eleven species of Bacillariophyceae mов=117.8×mchla (r2=0.997) and for six species of Dinophyceae mов=402.5×mchla (r2=0.986). It could explain the high degrees of correlation for two dependencies in optimal conditions of algae cultures growth. The difference in proportionality coefficients indicates physiological features of the chemical composition of Bacillariophyceae and Dinophyceae cells.
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    Recommendations on obtaining Dunaliella salina biomass with the high content of β-carotene
    (К.: Фітосоціоцентр, 2013) Borovkov, A. B.; Gudvilovich, I. N.
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    Influence of the diurnal light-dark regimen on growth and production characteristics of microalgae (review)
    (К.: Фітосоціоцентр, 2013) Avsiyan, A. L.
    The diurnal light-dark regimen is reviewed as the factor influencing growth and production characteristics of microalgae. Literature data show that photoperiod may influence cell cycle, growth rate, photosynthesis rate and other metabolic processes of microalgae. The factors modulating intensity of the influence of the photoperiod on growth parameters are revealed.
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    Experience of application of modern information technology in algal database development
    (К.: Фітосоціоцентр, 2013) Virsta, G. N.; Evstigneev, V. P.; Evstigneeva, I. K.; Tankovskaya, I. N.
    Databank of results of phytobenthos exploration of the Department of Biotechnology and Phytoresources (IBSS) is presented. Format of the databank is Microsoft Excel table. Using Visual Basic for Application built in Excel the databank has additional functionality enabling one to calculate a number of ecological-taxonomic, productional coefficients, indices etc.
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    Pseudospongiococcum protococcoides position detection in the system Chlorophyta
    (К.: Фітосоціоцентр, 2013) Skrebovska, S. V.; Chelebieva, E. S.
    For first time the place of authentic strain Pseudospongiococcum protococcoides (CALU-221) was determined on the basis of nucleic sequence analysis 18S rDNA. It has been shown that P. protococcoides attributes to Scenedesmaceae family and is a part of molecular clade «Coelastrella».
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    Use of Arthrospira platensis (Nordst.) Geitl for poultry waste utilization
    (К.: Фітосоціоцентр, 2013) Gorbunova, S. Yu.; Zhondareva, Y. D.
    The possibility of Arthrospira platensis cultivation in the organic nutrient medium consisting of extracts of chicken dung has been experimentally investigated. Chicken dung, as a multi-component mixture of various chemicals, stimulates the growth of algae. It is can be used as a free raw material for microalgae cultivation.
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    Features of secondary carotenogenesis in green microalgae Scenedesmus rubescens (P.J.L. Dangeard) E. Kessler et al.
    (К.: Фітосоціоцентр, 2013) Chelebieva, E. S.
    Based on the of nucleic sequence analysis 18S rDNA the taxonomic status Scenedesmus rubescens (strain IBSS - IPPAS D-292) is corrected. Data characterizing the features of secondary carotenogenesis (population dynamics, size of cells, total content of carotenoids, the secondary carotenoids composition and content of the main components of dry matter (protein, carbohydrates and lipids)) in cells and cultures of green microalgae Scenedesmus rubescens when grown by the method of two-stage batch culture are obtained.
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    Microalgae of benthos of the coastal waters of Cape Kazantip
    (К.: Фітосоціоцентр, 2013) Bondarenko, A. V.
    The species diversity of microalgae of Kazantip coasts from different localities were investigated. 172 taxa of microalgae in different marine ecotopes: epiphyton, epilithon and soft bottom were registered.