RT Journal Article
T1 Amino acids profile of 56 species of microalgae reveals that free amino acids allow to distinguish between phylogenetic groups
A1 León Vaz, Antonio
A1 Giráldez Díaz, Inmaculada
A1 Moreno Garrido, Ignacio
A1 Varela, João
A1 Vigara Fernández, Javier
A1 León Bañares, Rosa María
A1 Cañavete, José Pedro
AB Microalgae represent a phototrophic resource with a high protein content, whose nutritional value is very high as a result of its amino acid profile. Although the total amino acid profile has been repeatedly described to change little among phylogenetic groups of microalgae, some variability has occasionally been reported. Part of this uncertainty is associated with the low phylogenetic diversity encompassed in the work to date and the high methodological variability between studies. Among these studies, very few have differentiated between total and free amino acid content for common microalgae samples. Thus, in the present work, the profile of total and free amino acids has been determined in a diverse group composed of 56 species of microalgae belonging to 7 phyla. A multivariate analysis of the total amino acid profile in the studied microalgae group revealed close amino acid patterns throughout microalgae phylogeny and agreed with results obtained from similar analysis performed with published data. Conversely, the free amino acid profile strongly differentiated between phylogenetic groups. On the one hand, species of Cyanobacteria, Plantae, Cryptophyta, and Bacillariophyta showed close free amino acid patterns, characterized by the highest abundance of free glutamic acid. Ochrophyta species were particularly rich in free proline, while the free amino acid profile of Miozoa and Haptophyta species stood out from the rest of the phylogenetic groups for their outstanding levels of the two essential amino acids phenylalanine and lysine. Haptophyta species were also characterized by their much higher free tyrosine content.
PB Elsevier
SN 2211-9264
YR 2023
FD 2023-06-21
LK https://hdl.handle.net/10272/22270
UL https://hdl.handle.net/10272/22270
LA eng
NO León-Vaz, A., Giráldez, I., Moreno-Garrido, I., Varela, J., Vigara, J., León, R., & Cañavate, J. P. (2023). Amino acids profile of 56 species of microalgae reveals that free amino acids allow to distinguish between phylogenetic groups. In Algal Research (Vol. 74, p. 103181). Elsevier BV. https://doi.org/10.1016/j.algal.2023.103181
NO This work was supported by the European Union Cooperation ProgramINTERREG VA POCTEP-055 ALGARED PLUS5E Spain-Portugal(2014–2020). The authors are grateful to the Fertinagro Biotech Foundation(C´atedra Fertinagro Biotech Universidad de Huelva). Funding foropen access charge: Universidad de Huelva / CBUA is acknowledged.
DS Repositorio Institucional de la Universidad de Huelva
RD 13 jun 2026