Abstract
The variability of the dimensional characteristics of 11 strains of green coccoid microalgae of five genera depending on the duration of exposure, temperature (22-34°C), light conditions (1-3 (± 0.5) kLx), and also on the composition of cultural medium, was investigated. It has been found that the dynamics of cell length and width depending on culture age and stage of its development are species specific. At the same time, cell downsizing was registered during the period of the most intensive culture growth, whereas cell enlargement was observed during the period of culture growth slowdown. In this case, cell length and its width changed not simultaneously. Culture aging was often accompanied by cell rounding. Abiotic factors (temperature, light, and nutrient medium composition) also significantly influenced cell dimensions of microalgae. Under optimal conditions, the density of algal cultures increased, whereas cell dimensions decreased.
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