Carbon Partitioning and Lipid Remodeling During Phosphorus and Nitrogen Starvation in the Marine MicroalgaDiacronema lutheri(Haptophyta)
| Autor: | Gaël Bougaran, Bing Huang, Virginie Mimouni, Annick Morant-Manceau, Ewa Lukomska |
|---|---|
| Přispěvatelé: | Mer, molécules et santé EA 2160 (MMS), Le Mans Université (UM)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Université de Nantes - UFR des Sciences Pharmaceutiques et Biologiques, Université de Nantes (UN)-Université de Nantes (UN), Institut Français de Recherche pour l'Exploitation de la Mer - Atlantique (IFREMER Atlantique), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER) |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
[SDV]Life Sciences [q-bio] chemistry.chemical_element Biomass Plant Science Aquatic Science Biology Haptophyta Photosynthesis 010603 evolutionary biology 01 natural sciences nitrogen Pigment chemistry.chemical_compound Betaine Microalgae Food science phosphorus 2. Zero hunger chemistry.chemical_classification 010604 marine biology & hydrobiology Phosphorus Carbon fixation Diacronema lutheri polyunsaturated fatty acid Lipids Carbon chemistry 13. Climate action visual_art visual_art.visual_art_medium lipids (amino acids peptides and proteins) carbon partitioning Polyunsaturated fatty acid |
| Zdroj: | Journal of Phycology Journal of Phycology, Wiley, 2020, 56 (4), pp.908-922. ⟨10.1111/jpy.12995⟩ Journal Of Phycology (0022-3646) (Wiley), 2020-08, Vol. 56, N. 4, P. 908-922 |
| ISSN: | 1529-8817 0022-3646 |
| Popis: | International audience; 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. |
| Databáze: | OpenAIRE |
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