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Título

Improvement of lipid production in the marine strains Alexandrium minutum and Heterosigma akashiwo by utilizing abiotic parameters

AutorFuentes-Grünewald, Claudio CSIC; Garcés, Esther CSIC ORCID CVN ; Alacid, Elisabet CSIC ORCID; Sampedro, Nagore CSIC ORCID ; Rossi, Sergio CSIC ORCID; Camp, Jordi CSIC ORCID
Palabras claveMicroalgae
Dinoflagellates
Raphidophytes
Lipids
Biofuel
Triacylglycerols
Fecha de publicaciónene-2012
EditorSpringer Nature
CitaciónJournal of Industrial Microbiology and Biotechnology 39 (1): 207-216 (2012)
ResumenTwo different strains of microalgae, one raphidophyte and one dinoflagellate, were tested under different abiotic conditions with the goal of enhancing lipid production. Whereas aeration was crucial for biomass production, nitrogen deficiency and temperature were found to be the main abiotic parameters inducing the high-level cellular accumulation of neutral lipids. Net neutral lipid production and especially triacylglycerol (TAG) per cell were higher in microalgae (>200% in Alexandrium minutum, and 30% in Heterosigma akashiwo) under treatment conditions (25°C; 330 μM NaNO3) than under control conditions (20°C; 880 μM NaNO3). For both algal species, oil production (free fatty acids plus TAG fraction) was also higher under treatment conditions (57 mg L−1 in A. minutum and 323 mg L−1 in H. akashiwo). Despite the increased production and accumulation of lipids in microalgae, the different conditions did not significantly change the fatty acids profiles of the species analyzed. These profiles consisted of saturated fatty acids (SAFA) and polyunsaturated fatty acids (PUFA) in significant proportions. However, during the stationary phase, the concentrations per cell of some PUFAs, especially arachidonic acid (C20:4n6), were higher in treated than in control algae. These results suggest that the adjustment of abiotic parameters is a suitable and one of the cheapest alternatives to obtain sufficient quantities of microalgal biomass, with high oil content and minimal changes in the fatty acid profile of the strains under consideration.
Descripción12 pages, 3 figures, 3 tables
Versión del editorhttps://doi.org/10.1007/s10295-011-1016-6
URIhttp://hdl.handle.net/10261/48806
DOI10.1007/s10295-011-1016-6
ISSN1367-5435
E-ISSN1476-5535
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