alexa Effects of fertilizer-based culture media on the production of exocellular polysaccharides and cellular superoxide dismutase by Phaeodactylum tricornutum (Bohlin)
Agri and Aquaculture

Agri and Aquaculture

Journal of Fertilizers & Pesticides

Author(s): Mara A GuzmnMurillo, Claudia C LpezBolaos, Tania LedesmaVerdejo, Gabriela RoldanLibenson, Marco A CadenaRoa

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Microalgae cultures are receiving attention because of increasing biotechnological and biomedical production of active biomolecules. We evaluated various fertilizer-based culture media to scale up production of the marine microalga Phaeodactylum tricornutum for production of exocellular polysaccharides (EPS), soluble proteins, and cellular superoxide dismutase (SOD). The standard source of sodium nitrate was the same as that used in the synthetic f/2 culture medium and ammonium nitrate, urea, ammonium sulfate, and calcium nitrate as alternative sources of nitrogen. The maximum production of EPS was achieved in microalgae cells grown in the culture media containing 63 and 23% nitrogen from ammonium sulfate, and also in microalgae cells grown in the culture media containing 3% nitrogen from ammonium nitrate. The maximum production of cellular SOD was achieved in microalgae cells grown in the culture media containing 35 and 26% nitrogen from ammonium sulfate, and in the culture media containing 17% nitrogen from urea. The results suggest that it is possible to use a source of nitrogen, other than sodium nitrate, to scale up growth of P. tricornutum for production of EPS and SOD at reduced costs.

This article was published in Journal of Applied Phycology and referenced in Journal of Fertilizers & Pesticides

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