Abstract
A productive photoautotrophic induction system was established for the production of antioxidative astaxanthin by the green microalga Haematococcus pluvialis. During photoautotrophic induction, N-deprived Haematococcus cells were sensitive to the specific irradiation rate (I) on transformation to astaxanthin-rich cyst cells. Compared with the CO: condition, the optimum specific irradiation rate (Iopt) was confined within narrow limits between light limitation and inhibition. Maximal astaxanthin synthesis in H. pluvialis was promoted under a 5 % CO2 environment and unsynchronized illumination with a specific irradiation rate of 80 μmol photon/g·s, yielding an accumulation rate of 4.3 mg/g·day. This result indicates that a favorable CO2 concentration and controlled specific irradiation rate leads to the productive encystment of H. pluvialis and enhanced astaxanthin synthesis.
Original language | English |
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Pages (from-to) | 745-748 |
Number of pages | 4 |
Journal | Journal of Industrial and Engineering Chemistry |
Volume | 12 |
Issue number | 5 |
State | Published - Sep 2006 |
Keywords
- Astaxanthin
- CO
- Haematococcus pluvialis
- Photoautotrophic induction
- Specific irradiation rate