Magnetic fields exhibit a positive impact on lipid and biomass yield during phototrophic cultivation of Spirulina sp.

Autor: da Costa Menestrino B; Laboratory of Biotechnology, School of Chemistry and Food, Federal University of Rio Grande, Rio Grande, Rio Grande do Sul, 96203-900, Brazil., Sala L; Laboratory of Biotechnology, School of Chemistry and Food, Federal University of Rio Grande, Rio Grande, Rio Grande do Sul, 96203-900, Brazil., Costa JAV; Laboratory of Biochemical Engineering, School of Chemistry and Food, Federal University of Rio Grande, Rio Grande, Rio Grande do Sul, 96203-900, Brazil., Buffon JG; Laboratory Mycotoxins and Food Science, School of Chemistry and Food, Federal University of Rio Grande, Rio Grande, Rio Grande do Sul, 96203-900, Brazil., Santos LO; Laboratory of Biotechnology, School of Chemistry and Food, Federal University of Rio Grande, Rio Grande, Rio Grande do Sul, 96203-900, Brazil. santoslucielen@gmail.com.
Jazyk: angličtina
Zdroj: Bioprocess and biosystems engineering [Bioprocess Biosyst Eng] 2021 Oct; Vol. 44 (10), pp. 2087-2097. Date of Electronic Publication: 2021 May 23.
DOI: 10.1007/s00449-021-02585-9
Abstrakt: This study aimed to investigate the effects of magnetic field (MF) application (1, 12 and 24 h day  -1 ) to Spirulina sp. LEB 18 in different photosynthesis cycles (dark and/or light) during short (15 days) and long periods (50 days) of cultivation. MF application was performed via two sources: ferrite magnets and solenoids. At the end of cultivation, the biomass was characterized in terms of lipids, proteins, and carbohydrates. In the 15 day cultures, the highest maximum biomass concentrations (2.06 g L -1 and 1.83 g L -1 ) were observed when 30 mT was applied for 24 h day  -1 or 12 h day  -1 (on the light cycle), respectively. MF application throughout cultivation (24 h day  -1 ) for more than 30 days is not recommended. In all conditions, there was an increase in the lipid concentration (from 14 to 45%). The protein profile suggested important changes in photosystems I and II due to MF application. Cell morphology was not altered by MF application. In conclusion, the effects on the metabolism of Spirulina sp. are directly related to the photosynthesis cycle and time period in which the MF was applied.
(© 2021. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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