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- W4321351800 abstract "Abstract Background Microalgae represent a suitable and eco-sustainable resource for human needs thanks to their fast growth ability, together with the great diversity in species and intracellular secondary bioactive metabolites. These high-added-value compounds are of great interest for human health or animal feed. The intracellular content of these valuable compound families is tightly associated with the microalgal biological state and responds to environmental cues, e.g., light. Our study develops a Biotechnological response curve strategy exploring the bioactive metabolites synthesis in the marine cyanobacterium Spirulina subsalsa over a light energy gradient. The Relative Light energy index generated in our study integrates the red, green and blue photon flux density with their relative photon energy. The Biotechnological response curve combined biochemical analysis of the macromolecular composition (total protein, lipid, and carbohydrate content), total sterols, polyphenols and flavonoids, carotenoids, phenolic compounds, vitamins (A, B 1 , B 2 , B 6 , B 9 , B 12 , C, D 2 , D 3 , E, H, and K 1 ), phycobiliproteins, together with the antioxidant activity of the biomass as well as the growth ability and photosynthesis. Results Results demonstrated that light energy significantly modulate the biochemical status of the microalga Spirulina subsalsa revealing the relevance of the light energy index to explain the light-induced biological variability. The sharp decrease of the photosynthetic rate at high light energy was accompanied with an increase of the antioxidant network response, such as carotenoids, total polyphenols, and the antioxidant capacity. Conversely, low light energy favorized the intracellular content of lipids and vitamins (B 2 , B 6 , B 9 , D 3 , K 1 , A, C, H, and B 12 ) compared to high light energy. Conclusions Results of the Biotechnological response curves were discussed in their functional and physiological relevance as well as for the essence of their potential biotechnological applications. This study emphasized the light energy as a relevant tool to explain the biological responses of microalgae towards light climate variability, and, therefore, to design metabolic manipulation of microalgae." @default.
- W4321351800 created "2023-02-20" @default.
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- W4321351800 date "2023-02-19" @default.
- W4321351800 modified "2023-10-10" @default.
- W4321351800 title "Biotechnological response curve of the cyanobacterium Spirulina subsalsa to light energy gradient" @default.
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- W4321351800 doi "https://doi.org/10.1186/s13068-023-02277-4" @default.
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