RT Book, Section
T1 Enhancement of carotenoid production in Nannochloropsis by phosphate and sulphur limitation
A1 Forján Lozano, Eduardo
A1 Garbayo Nores, Inés
A1 Casal Bejarano, Carlos
A1 Vílchez Lobato, Carlos
AB Because of its value as antioxidants, food-supplements and in animal-feeding, carotenoids are among themost attractive target compounds of marine microalgae. In this contribution the influence of essentialnutrients (N, S and P) limitation on the accumulation of carotenoids in the marine microalgaNannochloropsis gaditana has been studied. High and rapid biomass production, which depends ongrowth conditions, is the first step in a bioproduction process. In our work was observed thatNannochloropsis gaditana growth was significantly faster when using 5 % (v/v) CO2 in air instead air orHCO3- as carbon source, at two different pH values assayed (7.2 and 8.2), as revealed from cellchlorophyll content, nitrate consumption rates and light-dependent oxygen production. Afterwards, cellsgrown to exponential phase were incubated in culture media containing none or limiting concentrations ofeither nitrate, sulphate or phosphate. The results showed that both starvation and low concentrations ofnutrients (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 alllimiting conditions tested, the increase of violaxanthin content being less pronounced.
PB Formatex
YR 2007
FD 2007
LK http://hdl.handle.net/10272/4510
UL http://hdl.handle.net/10272/4510
LA spa
NO FORJÁN LOZANO, E., GARBAYO NORES, I., CASAL BEJARANO, C., VÍLCHEZ LOBATO, C. (2007). "Enhancement of carotenoid production in Nannochloropsis by phosphate and sulphur limitation". En: Communicating Current Research and Educational Topics and Trends in Applied Microbiology. Microbiology Book Series, VOL. I, pp. 356-364.  Formatex. Badajoz, España.  ISBN-13: 978-84-611-9421-6(SERIE), ISBN-13: 978-84-611-9422-3(VOL. I).
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026