Publications

Authors:

Fattore, Nicolò; Bellan, Alessandra; Pedroletti, Luca; Vitulo, Nicola; Morosinotto, Tomas

Title:

Acclimation of photosynthesis and lipids biosynthesis to prolonged nitrogen and phosphorus limitation in Nannochloropsis gaditana

Year:

2021

Type of item:

Articolo in Rivista

Tipologia ANVUR:

Articolo su rivista

Language:

Inglese

Referee:

No

Name of journal:

ALGAL RESEARCH

ISSN of journal:

2211-9264

N° Volume:

58

Page numbers:

1-11

Keyword:

Microalgae; Biodiesel; Triacylglycerols; Photosynthesis; Nannochloropsis

Short description of contents:

Microalgae represent a potential sustainable source of molecules and materials and the improvement of the knowledge of their metabolic regulation is essential to maximize their potential. Nutrients deprivation stimulates the accumulation of reserve lipids, triacylglycerols but also inhibits photosynthesis with a negative impact on biomass production and therefore overall productivity. In this work, the seawater microalga Nannochloropsis gaditana was cultivated long term in a semi-continuous system where the concentrations of nitrogen or phosphorus were limiting but still sufficient to sustain growth indefinitely, to highlight the response to a long-term nutrient limitation and distinguishing it from the one to acute short-term stress. N. gaditana cells can acclimate to chronic nutrients limitation maintaining photosynthetic activity while also accumulating lipids. Both nitrogen and phosphorus limitation induced an increase of triacylglycerols content, although not by the induction of the synthesis of fatty acids but rather by modulating the fluxes of reduced carbon molecules toward lipid biosynthesis. Photosynthetic activity was maintained under P limitation while this was strongly affected by nitrogen depletion, where proteins of photosynthetic apparatus were largely reduced in content but still maintained their functionality and were able to achieve half of the biomass productivity with 30% of the nitrogen supply.

Product ID:

125332

Handle IRIS:

11562/1060200

Last Modified:

November 15, 2022

Bibliographic citation:

Fattore, Nicolò; Bellan, Alessandra; Pedroletti, Luca; Vitulo, Nicola; Morosinotto, Tomas, Acclimation of photosynthesis and lipids biosynthesis to prolonged nitrogen and phosphorus limitation in Nannochloropsis gaditana «ALGAL RESEARCH» , vol. 58 , 2021 , pp. 1-11

Consulta la scheda completa presente nel repository istituzionale della Ricerca di Ateneo