| Registro completo |
| Provedor de dados: |
ArchiMer
|
| País: |
France
|
| Título: |
Betaine lipid and neutral lipid production under nitrogen or phosphorus limitation in the marine microalga Tisochrysis lutea (Haptophyta)
|
| Autores: |
Huang, Bing
Marchand, Justine
Thiriet-rupert, Stanislas
Carrier, Gregory
Saint-jean, Bruno
Lukomska, Ewa
Moreau, Brigitte
Morant-manceau, Annick
Bougaran, Gael
Mimouni, Virginie
|
| Data: |
2019-06
|
| Ano: |
2019
|
| Palavras-chave: |
Tisochrysis lutea
Phosphorus
Nitrogen
Lipid remodeling
Betaine lipid
Polyunsaturated fatty acid
|
| Resumo: |
Nitrogen (N) and phosphorus (P) limitations induce neutral lipid accumulation and membrane lipid remodeling in the domesticated oleaginous microalga Tisochrysis lutea. This study compared growth, photosynthetic activity, biochemical and transcriptional responses of T. lutea throughout batch cultures under N or P limitation compared with non-limiting nutrient condition (NP). The results show that, under N limitation, the breakdown and re-use of cellular N-containing compounds contributed to carbohydrates and further triacylglycerol (TAG) accumulation, where the accumulation of docosahexaenoic acid (DHA) in neutral lipids might mainly be derived from the recycling of membrane polar lipids. Conversely, P limitation did not hinder the photosynthetic capacity; a higher efficiency of carbon fixation fueled the allocation of carbon fluxes to the reserves of carbohydrates and neutral lipids. These latter accumulated without massive degradation of essential cellular compounds. Betaine lipids constitute the major compounds of non-plastidial membranes in T. lutea. Given an extremely low constitutive phospholipid level, phospholipids might not be involved in the regulation of P storage. However, transfer of P from non-plastidial to chloroplast membranes might occur, keeping a stable lipid composition of thylakoid membranes and maintaining a relatively high photosynthetic capacity under P deprivation.
|
| Tipo: |
Text
|
| Idioma: |
Inglês
|
| Identificador: |
https://archimer.ifremer.fr/doc/00492/60409/64776.pdf
DOI:10.1016/j.algal.2019.101506
https://archimer.ifremer.fr/doc/00492/60409/
|
| Editor: |
Elsevier BV
|
| Formato: |
application/pdf
|
| Fonte: |
Algal Research-biomass Biofuels And Bioproducts (2211-9264) (Elsevier BV), 2019-06 , Vol. 40 , P. 101506 (15p.)
|
| Direitos: |
info:eu-repo/semantics/openAccess
restricted use
|
|
