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Article

Bioprospecting of Microalgae Isolated from the Adriatic Sea: Characterization of Biomass, Pigment, Lipid and Fatty Acid Composition, and Antioxidant and Antimicrobial Activity

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Faculty of Food Technology and Biotechnology, University of Zagreb, 10000 Zagreb, Croatia
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Laboratory for Marine and Atmospheric Biogeochemistry, Division for Marine and Environmental Research, Ruđer Bošković Institute, 10000 Zagreb, Croatia
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Laboratory for Aquaculture Biotechnology, Division of Materials Chemistry, Ruđer Bošković Institute, 10000 Zagreb, Croatia
4
Center of Excellence for Marine Bioprospecting (BioProCro), Ruđer Bošković Institute, 10000 Zagreb, Croatia
*
Author to whom correspondence should be addressed.
Academic Editor: Pedro Lozano Rodríguez
Molecules 2022, 27(4), 1248; https://doi.org/10.3390/molecules27041248
Received: 11 December 2021 / Revised: 25 January 2022 / Accepted: 7 February 2022 / Published: 12 February 2022
(This article belongs to the Special Issue Isolation and Characterization of Antioxidants from Natural Sources)
Marine microalgae and cyanobacteria are sources of diverse bioactive compounds with potential biotechnological applications in food, feed, nutraceutical, pharmaceutical, cosmetic and biofuel industries. In this study, five microalgae, Nitzschia sp. S5, Nanofrustulum shiloi D1, Picochlorum sp. D3, Tetraselmis sp. Z3 and Tetraselmis sp. C6, and the cyanobacterium Euhalothece sp. C1 were isolated from the Adriatic Sea and characterized regarding their growth kinetics, biomass composition and specific products content (fatty acids, pigments, antioxidants, neutral and polar lipids). The strain Picochlorum sp. D3, showing the highest specific growth rate (0.009 h−1), had biomass productivity of 33.98 ± 0.02 mg L−1 day−1. Proteins were the most abundant macromolecule in the biomass (32.83–57.94%, g g−1). Nanofrustulum shiloi D1 contained significant amounts of neutral lipids (68.36%), while the biomass of Picochlorum sp. D3, Tetraselmis sp. Z3, Tetraselmis sp. C6 and Euhalothece sp. C1 was rich in glycolipids and phospholipids (75%). The lipids of all studied microalgae predominantly contained unsaturated fatty acids. Carotenoids were the most abundant pigments with the highest content of lutein and neoxanthin in representatives of Chlorophyta and fucoxanthin in strains belonging to the Bacillariophyta. All microalgal extracts showed antioxidant activity and antimicrobial activity against Gram-negative E. coli and S. typhimurium and Gram-positive S. aureus. View Full-Text
Keywords: bioprospecting; marine microalgae; biomass composition; fatty acids; growth rate; pigments; antioxidant activity; antimicrobial activity; glycolipids; phospholipids bioprospecting; marine microalgae; biomass composition; fatty acids; growth rate; pigments; antioxidant activity; antimicrobial activity; glycolipids; phospholipids
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MDPI and ACS Style

Grubišić, M.; Šantek, B.; Zorić, Z.; Čošić, Z.; Vrana, I.; Gašparović, B.; Čož-Rakovac, R.; Ivančić Šantek, M. Bioprospecting of Microalgae Isolated from the Adriatic Sea: Characterization of Biomass, Pigment, Lipid and Fatty Acid Composition, and Antioxidant and Antimicrobial Activity. Molecules 2022, 27, 1248. https://doi.org/10.3390/molecules27041248

AMA Style

Grubišić M, Šantek B, Zorić Z, Čošić Z, Vrana I, Gašparović B, Čož-Rakovac R, Ivančić Šantek M. Bioprospecting of Microalgae Isolated from the Adriatic Sea: Characterization of Biomass, Pigment, Lipid and Fatty Acid Composition, and Antioxidant and Antimicrobial Activity. Molecules. 2022; 27(4):1248. https://doi.org/10.3390/molecules27041248

Chicago/Turabian Style

Grubišić, Marina, Božidar Šantek, Zoran Zorić, Zrinka Čošić, Ivna Vrana, Blaženka Gašparović, Rozelindra Čož-Rakovac, and Mirela Ivančić Šantek. 2022. "Bioprospecting of Microalgae Isolated from the Adriatic Sea: Characterization of Biomass, Pigment, Lipid and Fatty Acid Composition, and Antioxidant and Antimicrobial Activity" Molecules 27, no. 4: 1248. https://doi.org/10.3390/molecules27041248

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