The dynamics of Dunaliella viridis epigenotypes at cumulative and quasicontinuous cultivation was studied. It was found that the pattern of nucleic acids, proteins, triacylglycerides, β-carotene, which characterizes epigenotype depends on the conditions of cultivation of microalgae. Quasicontinuous cultivation of D. viridis can increase biomass yield by 23 % compared to the cumulative cultivation, with the specific productivity was 3 times less than the cumulative cultivation. It was found that the growth rate of the microalgae correlates with the accumulation exopolysaccharides in the culture medium.

Keywords: Dunaliella viridis, epigenotype, biomass composition, cumulative cultivation, quasicontinuous cultivation

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