Abstract
Dynamics of chlorophyll and paramylon accumulation in Euglena gracilis cells at mixotrophic cultivation
Highlights
The photosynthetic efficiency of microalgae is much higher than land plants, its commercial cultivation is viewed as a promising area of biotechnology, that can facilitate the production of many useful compounds [28, 29]
In this work we investigated the effect of ethanol as a substrate on the culture growth and the paramylon accumulation in the cells during the cultivation of E. gracilis
The exponential growth phase begun at 2–3th days of cultivation and continued up to the 10th day in the all variants of the cultures, when transition growth phase began
Summary
The photosynthetic efficiency of microalgae is much higher than land plants, its commercial cultivation is viewed as a promising area of biotechnology, that can facilitate the production of many useful compounds [28, 29]. The metabolic flexibility enables microalgae to use different organic substrates for nutrition and to adapt to existence in wide range of environment conditions [20, 23]. Unicellular microalga E. gracilis attracts an increasing attention in this direction due to ability to simultaneous accumulation of several useful products: amino acids, vitamins, fat acids, paramylon [19, 21]. The organism is able to photosynthesis and can absorb different organic substrates from the environment in the light and in the dark. E. gracilis can use ethanol as organic substrate, despite the fact that it is toxic for majority of microorganisms [26].
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