Abstract
The culture of microalgae and cyanobacteria in open systems has been improved through the novel approach of thin-layer raceway ponds. The importance of studying mass cultivation of the cyanobacterium Nostoc calcicola (further as Nostoc) lies in its biotechnological potential as a source of bioactive compounds for food and non-food applications. These compounds include polysaccharides, mycosporine-like amino acids and phycocyanin. Nostoc was cultured outdoors in a thin-layer raceway pond where the biomass production, physiological status, photosynthetic activity, and biochemical composition were monitored through the experimental period of 5 days. The biomass, as did the maximal quantum yield of PSII, maximal electron transport rate (ETRmax) and photosynthetic efficiency (αETR) increased throughout the experimental period showing the optimal operation of the thin-layer raceway ponds, due to the light penetrates deeper into the thin culture layer and thus more light is available to the cells. Oxygen levels in the culture increased over time, but no photoinhibition was evident indicating optimal action of non-photochemical mechanisms. Nostoc increased the total internal carbon content over the experimental period. Chlorophyll increased, whereas the N compounds such as the biliprotein phycocyanin decreased. Among the UV-absorbing compounds, polyphenols, mycosporine-like amino acids, such as shinorine and other unknown UV-A absorbing compounds were detected. There components showed a positive correlation to antioxidant activity. Thus, the optimal accumulation of biomass and the accumulation of bio-active compounds having antioxidant capacity show the possible biotechnological applications of Nostoc.
Original language | English |
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Article number | 102421 |
Journal | Algal Research |
Volume | 59 |
DOIs | |
State | Published - Nov 2021 |
Bibliographical note
Funding Information:The authors thank Ms. Soňa Pekařová, Mr. Jan Pilný, Mr. Michal Bureš and Mr. Petr Novotný for technical assistance and Dr. Richard Lhotský for experiment management. The authors thank to the local organizers of Algatech Center of the Institute of Microbiology (Czech Academic of Sciences) the organization of GAP10 workshop “Aquatic productivity - in the Omics Era”, held in Třeboň (Czech Republic) between 19 and 30 August 2017. This work was supported by the EU program Horizon 2020 (project SABANA, grant no. 727874) and in part by the Program INTERREG V-A Austria – Czech Republic, project ATCZ221 Algae 4 Fish. PSMCP was supported by the Santander scholarship to young research 2017 and project FONDECYT N° 11180197. FLF thanks Junta de Andalucía for financial support of the research group “Photobiology and biotechnology of aquatic organisms” (FYBOA-RNM295). TAR was supported by the Universidad de Buenos Aires, Argentina. AN thanks BARD Research Grant Award No. US – 4599-13R (The United States – Israel Binational Agricultural Research and Development Fund) and additional funds from the Israeli Ministry for Science and Technology and the Dead Sea-Arava Science Center (DSASC) to AN. This special issue of Algal Research is dedicated to Prof. Jacco Kromkamp, regular participant and organizer of GAP workshops, who unluckily passed away in October 2020.
Funding Information:
This work was supported by the EU program Horizon 2020 (project SABANA, grant no. 727874 ) and in part by the Program INTERREG V-A Austria – Czech Republic , project ATCZ221 Algae 4 Fish. PSMCP was supported by the Santander scholarship to young research 2017 and project FONDECYT N° 11180197 . FLF thanks Junta de Andalucía for financial support of the research group “Photobiology and biotechnology of aquatic organisms” ( FYBOA-RNM295 ). TAR was supported by the Universidad de Buenos Aires , Argentina. AN thanks BARD Research Grant Award No. US – 4599-13R (The United States – Israel Binational Agricultural Research and Development Fund) and additional funds from the Israeli Ministry for Science and Technology and the Dead Sea-Arava Science Center (DSASC) to AN.
Publisher Copyright:
© 2021 Elsevier B.V.
Keywords
- Aquaculture
- Biochemical composition
- In-vivo chlorophyll a fluorescence
- Nostoc
- Photosynthesis
- Thin-layer raceway cultivator
ASJC Scopus subject areas
- Agronomy and Crop Science