@misc{10272/4510,
year = {2007},
url = {http://hdl.handle.net/10272/4510},
abstract = {Because of its value as antioxidants, food-supplements and in animal-feeding, carotenoids are among the
most attractive target compounds of marine microalgae. In this contribution the influence of essential
nutrients (N, S and P) limitation on the accumulation of carotenoids in the marine microalga
Nannochloropsis gaditana has been studied. High and rapid biomass production, which depends on
growth conditions, is the first step in a bioproduction process. In our work was observed that
Nannochloropsis gaditana growth was significantly faster when using 5 % (v/v) CO2 in air instead air or
HCO3
- as carbon source, at two different pH values assayed (7.2 and 8.2), as revealed from cell
chlorophyll content, nitrate consumption rates and light-dependent oxygen production. Afterwards, cells
grown to exponential phase were incubated in culture media containing none or limiting concentrations of
either nitrate, sulphate or phosphate. The results showed that both starvation and low concentrations of
nutrients (0.005 mM P, 0.2 mM N, 1.1 · 10-5 mM S) drove to increases of carotenoids/chlorophyll ratios,
specially for sulphur limitation. In a general view, zeaxanthin and violaxanthin content increased in all
limiting conditions tested, the increase of violaxanthin content being less pronounced.},
publisher = {Formatex},
keywords = {Nannochloropsis},
keywords = {Carotenoids},
keywords = {Nutritional stress},
title = {Enhancement of carotenoid production in Nannochloropsis by phosphate and sulphur limitation},
author = {Forján Lozano, Eduardo and Garbayo Nores, Inés and Casal Bejarano, Carlos and Vílchez Lobato, Carlos},
}