RT Book, Section
T1 UV-A promotes long-term carotenoid production of Dunaliella in photobioreactors with retention of cell viability
A1 Mogedas Romero, Benito
A1 Salguero, A.
A1 Casal Bejarano, Carlos
A1 Vílchez Lobato, Carlos
AB The effect of adding UV-A radiations (320-400 nm) to photosynthetically active radiation (PAR, 400-700nm) during the growth of Dunaliella bardawil in an air-fluidized bed photobioreactor was studied toevaluate cell growth and long-term production of carotenoids. The obtained results were compared tothose obtained from D. bardawil cultures incubated under lab standard conditions for carotenoidproduction, this is to say, nitrogen starvation and absence of UV-A radiation. The addition of 26.5 μmolphotons m-2 s-1 UV-A radiation to 1150 μmol photons m-2 s-1 PAR stimulated the growth of D. bardawilcultures grown in a full nutrient culture medium. The total carotenoid content, mostly β-carotene, washigher than that of control cultures (UV-A non added cultures) along the exponential phase. Theconcentration of β-carotene in UV-A added cultures after 450 h was found to be about two-fold that ofcontrol cultures. From the results of this work it can be concluded that the UV-A modulated addition toPAR could be successfully applied to long-term carotenoid production processes, whereas D. bardawilcells accumulates carotenoids with retention of its viability. It is also shown that UV-A promotesincreases of both carotenoid production per culture volume unit and the specific carotenoid productionrate (pg.cell-1), β-carotene being the major accumulated carotenoid.
PB Formatex
SN ISBN-13: 978-84-611-9421-6(SERIE)
SN ISBN-13: 978-84-611-9422-3(VOL. I)
YR 2007
FD 2007
LK http://hdl.handle.net/10272/4506
UL http://hdl.handle.net/10272/4506
LA eng
NO MOGEDAS, B., SALGUERO, A., CASAL BEJARANO, C., VÍLCHEZ LOBATO, C.(2007) : "UV-A promotes long-term carotenoid production of Dunaliella in photobioreactors with retention of cell viability". En: Communicating Current Research and Educational Topics and Trends in Applied Microbiology. Microbiology Book Series,  VOL. I, pag. 348-355. 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 14 jul 2026