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Provedor de dados:  ArchiMer
País:  France
Título:  Carbon partitioning and lipid remodeling during phosphorus and nitrogen starvation in the marine microalga Diacronema lutheri (Haptophyta)
Autores:  Huang, Bing
Mimouni, Virginie
Lukomska, Ewa
Morant-manceau, Annick
Bougaran, Gael
Data:  2020-08
Ano:  2020
Palavras-chave:  Carbon partitioning
Diacronema lutheri
Polyunsaturated fatty acid
Resumo:  The domesticated marine microalga Diacronema lutheri is of great interest for producing various highly valuable molecules like lipids, particularly long‐chain polyunsaturated fatty acids (LC‐PUFA). In this study, we investigated the impact of phosphorus (P) and nitrogen (N) starvation on growth, carbon fixation (photosynthetic activity) and partitioning, and membrane lipid remodeling in this alga during batch culture. Our results show that the photosynthetic machinery was similarly affected by P and N stress. Under N starvation, we observed a much lower photosynthetic rate and biomass productivity. The degradation and re‐use of cellular N‐containing compounds contributed to triacylglycerol (TAG) accumulation. On the other hand, P‐starved cells maintained pigment content and a carbon partitioning pattern more similar to the control, ensuring a high biomass. Betaine lipids constitute the major compounds of non‐plastidial membranes, which are rich in eicosapentaenoic (EPA) and docosahexaenoic (DHA) acids. Under P and N starvations, EPA was transferred from the recycling of membrane polar lipids, most likely contributing to TAG accumulation.
Tipo:  Text
Idioma:  Inglês

Editor:  Wiley
Formato:  application/pdf
Fonte:  Journal Of Phycology (0022-3646) (Wiley), 2020-08 , Vol. 56 , N. 4 , P. 908-922
Direitos:  info:eu-repo/semantics/openAccess

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