RT Unpublished Material
T1 UV-A mediated modulation of photosynthetic efficiency, xanthophyll cycle and fatty acid production ofNannochloropsis
A1 Vílchez Lobato, Carlos
A1 Forján Lozano, Eduardo
A1 Garbayo Nores, Inés
A1 Henriques, Marta Helena Fernandes
A1 Rocha, Jorge
A1 Vega Piqueres, José María
K1 Algas
AB Nannochloropsis, a green microalga, is source for commercially valuable compounds asextensively described and, in particular, is recognized as a good potential source of EPA(20:5v3), an important polyunsaturated fatty acid for human consumption for preventionof several diseases. Climate change might include variation in the UV levels, as one ofthe consequences derived from the antropogenic activity. This paper shows the responseof Nannochloropsis cultures exposed for 7 days to UV-A added to PAR. Growth ratesand photosynthetic activity were assessed to determine the impact of UV-A increasedlevels on the cell growth and basic metabolism activity. Xanthophyll pigments(zeaxanthin and violaxanthin), carotenoids (cantaxanthin and β-carotene) and PUFAs(miristic, palmitic, palmitoleic, araquidonic and eicosapentanoic acids) were measuredfor assessing the antioxidant response of the microalgae to added UV-A radiation toPAR. The results show that the modulated use of UV-A radiations can led to increasedgrowth rates which are sustained in time by an increased light transduction activity. Theexpected antioxidant response to the incident UV-A radiation consisted of increases inzeaxanthin and β-carotene contents –synthesis of antioxidant carotenoids- and increasesin the SFAs (saturated fatty acids) to PUFAs (polyunsaturated fatty acids) ratio. Theresults suggest that modulated UV-A radiation can be used as a tool to stimulate valuemolecules accumulation in microalgae through an enhanced both light transductionprocess and antioxidant response, while sustaining cell growth
PB Springer
SN 1436-2228
YR 2010
FD 2010
LK http://hdl.handle.net/10272/2721
UL http://hdl.handle.net/10272/2721
LA eng
NO VÍLCHEZ LOBATO, Carlos ; FORJÁN LOZANO, Eduardo ; GORBAYO NORES, Inés ; ENRIQUES, Marta Helena Fernandes ; ROCHA, Jorge. "UV-A mediated modulation of photosynthetic efficiency, xanthophyll cycle and fatty acid production ofNannochloropsis". Marine Biotechnology. Vol 12, n. 5 (2010). ISSN 1436-2228
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026