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Open AccessArticle

Far-Red Light Acclimation for Improved Mass Cultivation of Cyanobacteria

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Centre for Sustainable Aquatic Research (CSAR), Bioscience department, College of Science, Swansea University, Singleton Park, Swansea SA2 8PP, UK
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Department of Biosciences, College of Science, Swansea University, Singleton Park, Swansea SA2 8PP, UK
*
Author to whom correspondence should be addressed.
Metabolites 2019, 9(8), 170; https://doi.org/10.3390/metabo9080170
Received: 1 August 2019 / Revised: 13 August 2019 / Accepted: 15 August 2019 / Published: 19 August 2019
(This article belongs to the Special Issue Metabolites from Phototrophic Prokaryotes and Algae Volume 2)
Improving mass cultivation of cyanobacteria is a goal for industrial biotechnology. In this study, the mass cultivation of the thermophilic cyanobacterium Chlorogloeopsis fritschii was assessed for biomass production under light-emitting diode white light (LEDWL), far-red light (FRL), and combined white light and far-red light (WLFRL) adaptation. The induction of chl f was confirmed at 24 h after the transfer of culture from LEDWL to FRL. Using combined light (WLFRL), chl f, a, and d, maintained the same level of concentration in comparison to FRL conditions. However, phycocyanin and xanthophylls (echinone, caloxanthin, myxoxanthin, nostoxanthin) concentration increased 2.7–4.7 times compared to LEDWL conditions. The productivity of culture was double under WLFRL compared with LEDWL conditions. No significant changes in lipid, protein, and carbohydrate concentrations were found in the two different light conditions. The results are important for informing on optimum biomass cultivation of this species for biomass production and bioactive product development. View Full-Text
Keywords: cyanobacteria; chromatic adaptation; LED; far-red light; growth; photosynthesis; mass cultivation; pigments; Chlorogloeopsis cyanobacteria; chromatic adaptation; LED; far-red light; growth; photosynthesis; mass cultivation; pigments; Chlorogloeopsis
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Silkina, A.; Kultschar, B.; Llewellyn, C.A. Far-Red Light Acclimation for Improved Mass Cultivation of Cyanobacteria. Metabolites 2019, 9, 170.

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