resumo
Green macroalgae of the genus Ulva, commonly known as sea lettuces, are currently traded worldwide for multiple applications, including human consumption. In this work, we evaluated the seasonal variation of the total content of lipids, esterified fatty acids (FAs) and polar lipids (the major carriers of FAs) at the level of the classes and molecular species of Ulva rigida cultivated in Portugal in a land-based integrated multitrophic aquaculture (IMTA) system. Comparing winter, spring, summer and autumn samples, the lipid content and abundance of unsaturated FAs, namely n-3 polyunsaturated FAs, were highest in winter and lowest in summer. However, regardless of seasonal variations, U. rigida had a low n-6/n-3 ratio in all seasons, which is associated with health benefits. Among the polar lipids, those that varied the most were betaines, glycolipids and phospholipids, including a high number of lysolipid species that increased during autumn and spring. Multivariate analysis using principal component analysis (PCA) showed better discrimination of the four seasons when the dataset on molecular lipid species was used. Knowledge of the seasonal variability of lipid composition in biomass of Ulva rigida can be used to better explore these green macroalgae as a source of bioactive polar lipids with high market value.
palavras-chave
FATTY-ACID-COMPOSITION; MEMBRANE-LIPIDS; LIGHT-INTENSITY; RED ALGA; MACROALGAE; SULFOQUINOVOSYLDIACYLGLYCEROL; NITROGEN; PROFILE; GROWTH; COAST
categoria
Biotechnology & Applied Microbiology
autores
Moreira, ASP; da Costa, E; Melo, T; Sulpice, R; Cardoso, SM; Pitarma, B; Pereira, R; Abreu, MH; Domingues, P; Calado, R; Domingues, MR
nossos autores
Ana Sofia Pereira Moreira
Investigador Júnior
Projectos
GENIALG - GENetic diversity exploitation for Innovative macro-ALGal biorefinery (GENIALG )
agradecimentos
This study was financed by Project GENIALG, from the European Union's Horizon 2020 research and innovation programme under grant agreement No. 727892. This output reflects only the author's view and the European Union cannot be held responsible for any use that may be made of the information contained therein. The authors are also grateful to FCT/MCTES (Portugal) for the financial support to CICECO - Aveiro Institute of Materials (UIDB/50011/2020+UIDP/50011/2020), QOPNA (UID/QUI/00062/2019), LAQV-REQUIMTE (UIDB/50006/2020), CESAM (UIDB/50017/2020+UIDP/50017/2020) and RNEM (LISBOA-01-0145-FEDER-402-022125), through national funds, and the co-funding by the FEDER, within the PT2020 Partnership Agreement and Compete 2020. Ana Moreira (BPD/UI51/5041/2017), Elisabete da Costa (BPD/UI51/5042/2018) and Ronan Sulpice are also grateful for the grants within the framework of Project GENIALG. This work was also supported by project OMICS4ALGAE (POCI-01-0145-FEDER-030962), funded by FEDER, through COMPETE2020 Programa -Operacional Competitividade e Internacionalizacao (POCI), and by national funds (OE), through FCT/MCTES, and project TraSeafood (PTDC/BIA-BMA/29491/2017) supported by FCT/MEC through national funds, and co-funding by FEDER, within the PT2020 Partnership Agreement and Compete 2020. This work is a contribution of the Marine Lipidomics Laboratory.