Cultivation and Analytical Screening of Kremastochrysis sp. (Chrysophyceae), a Microalga Isolated from Alpine Snow

Cecilia Nicoletti, Klaus Krennhuber, Daniel Remias

Publikation: Beitrag in Buch/Bericht/TagungsbandKonferenzbeitrag


Unicellular photoautotrophic Chrysophyceae (golden algae) are predominantly known for their presence in plankton during spring and autumn. They also occur in long-lasting, melting snowfields in polar and mountainous environments, where they give the snow a yellowish color. Little is known about their adaptations to cold and oligotrophic habitats or about their biotechnological potential. A species was isolated from a seasonal snowfield in the Austrian Alps, 2000 m above sea level. The strain was preliminarily assigned to the genus Kremastochrysis. Cultures were grown in inorganic DY-V medium, aerated, illuminated at 30 to 40 µmol PAR m-2 s-1 and exposed either to 1 or 15°C. The cells occurred mainly as heterokont flagellates or, in older batches, as loose aggregates of immotile capsal stage cells. The lyophilised algae were analyzed for fatty acids (GC/MS), pigments and amino acids (LC/DAD+FLD) in order to evaluate the occurrence of valuable metabolites. It was found that Kremastochrysis sp. DR75b accumulated the polyunsaturated fatty acid eicosapentaenoic acid (EPA; C20:5), which has become popular as a substitute for fish oil in vegan diets. Further steps will include improving growth conditions and the EPA output, as well as a transcriptomic comparison of the two tested temperature levels.
TitelCultivation and Analytical Screening of Kremastochrysissp. (Chrysophyceae), a Microalga Isolated from Alpine Snow
PublikationsstatusVeröffentlicht - 2018
VeranstaltungSymposium on Microalgal Biotechnology in Agriculture - Třeboň, Tschechische Republik
Dauer: 25 Sep. 201826 Sep. 2018


KonferenzSymposium on Microalgal Biotechnology in Agriculture
Land/GebietTschechische Republik


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