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Biology v.7 no.1, 2018년, pp.2 -   

Media Screening for Obtaining Haematococcus pluvialis Red Motile Macrozooids Rich in Astaxanthin and Fatty Acids

Butler, Thomas O.    (Department of Biological and Chemical Engineering, Sheffield University, Sheffield S1 3JD, UK   ); McDougall, Gordon J.    (The James Hutton Institute, Invergowrie, Dundee DD2 5DA, UK  ); Campbell, Raymond    (gordon.mcdougall@hutton.ac.uk (G.J.M.)  ); Stanley, Michele S.    (raymond.campbell@hutton.ac.uk (R.C.)   ); Day, John G.    (The James Hutton Institute, Invergowrie, Dundee DD2 5DA, UK  );
  • 초록  

    Astaxanthin from Haematococcus pluvialis is commercially produced in a two-stage process, involving green vegetative (macrozooid) and red aplanospore stages. This approach has been scaled up to an industrial process but constraints limit its commercial success and profitability, including: contamination issues, high pigment extraction costs, requirements for high light levels and photo-bleaching in the red stage. However, in addition to the aplanospore stage, this alga can produce astaxanthin in vegetative palmelloid and motile macrozooid cells. In this study, a two-stage process utilising different media in the green stage, with subsequent re-suspension in medium without nitrate was employed to optimise the formation of red motile macrozooids. Optimal growth in the green phase was obtained on cultivation under mixotrophic conditions in EG:JM media followed by re-suspension in medium without nitrate resulting in red motile macrozooids with an astaxanthin content of 2.74% (78.4% of total carotenoids) and a lipid content of 35.3% (rich in unsaturated fatty acids. It is envisaged that the red motile macrozooids could be harvested and fed as a whole-cell product directly in the animal feed and aquaculture sectors, or used as a blend of carotenoids and polyunsaturated fatty acids (PUFAs) in nutraceutical products.


  • 주제어

    algal biotechnology .   astaxanthin .   carotenoids .   fatty acids .   Haematococcus .   red motile macrozooids.  

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