Role of light emitting diode (LED) wavelengths on increase of protein productivity and free amino acid profile of Spirulina sp. cultures

Denise da Fontoura Prates; Jessica Hartwig Duarte; Raquel Guidetti Vendruscolo; Roger Wagner; Cristiano Augusto Ballus; Wellington da Silva Oliveira; Helena Teixeira Godoy; Milene Teixeira Barcia; Michele Greque de Morais; Elisângela Martha Radmann; Jorge Alberto Vieira Costa

doi:10.1016/j.biortech.2020.123184

Role of light emitting diode (LED) wavelengths on increase of protein productivity and free amino acid profile of Spirulina sp. cultures

Bioresour Technol. 2020 Jun:306:123184. doi: 10.1016/j.biortech.2020.123184. Epub 2020 Mar 14.

Affiliations

¹ Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, Brazil.
² Department of Food Science and Technology, Federal University of Santa Maria, Santa Maria, Brazil.
³ Department of Food Science, Faculty of Food Engineering, University of Campinas, Campinas, Brazil.
⁴ Laboratory of Microbiology and Biochemistry, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, Brazil.
⁵ Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, Brazil. Electronic address: jorge@pq.cnpq.br.

PMID: 32238318
DOI: 10.1016/j.biortech.2020.123184

Abstract

LEDs have specific wavelengths that can positively influence the production of microalga biomass and biomolecules of interest. Filling the gaps in the literature, this study evaluated the effect of different LED wavelengths and photoperiods on protein productivities and free amino acid (FAA) profile of Spirulina sp. LEB 18 cultures. The best protein productivity results were obtained in red and green LED cultures using integral and partial photoperiods, respectively. In these experiments, protein productivities increased 2 and 1.6 times, respectively, compared to the control culture using fluorescent light. Green LEDs in partial photoperiod provided also the highest concentrations of essential and non-essential FAA, about 1.8 and 2.3 times higher, respectively, than control cultures. LEDs showed to be a promising sustainable light source for increasing protein productivity and FAA concentration in Spirulina sp. LEB 18 cultures.

Keywords: Cyanobacteria; Light source; Microalgae; Photoperiod; Protein productivity.

MeSH terms

Amino Acids
Biomass
Microalgae*
Spirulina*

Substances

Amino Acids