Abstract
Influence of culture conditions such as light, temperature and C/N ratio was studied on growth of Haematococcus pluvialis and astaxanthin production. Light had significant effect on astaxanthin production and it varied with its intensity and direction of illumination and effective culture ratio (ECR, volume of culture medium/volume of flask). A 6-fold increase in astaxanthin production (37 mg/L) was achieved with 5.1468·107 erg·m−2·s−1 light intensity (high light, HL) at effective culture ratio of 0.13 compared to that at 0.52 ECR, while the difference in the astaxanthin production was less than 2 — fold between the effective culture ratios at 1.6175·107 erg·m−2·s−1 light intensity (low light, LL). Multidirectional (three-directional) light illumination considerably enhanced the astaxanthin production (4-fold) compared to unidirectional illumination. Cell count was high at low temperature (25 °C) while astaxanthin content was high at 35 °C in both autotrophic and heterotrophic media. In a heterotrophic medium at low C/N ratio H. pluvialis growth was higher with prolonged vegetative phase, while high C/N ratio favoured early encystment and higher astaxanthin formation.
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Abbreviations
- BBM:
-
Bold basal medium
- ECR:
-
effective culture ratio
- KM1:
-
heterotrophic medium
- HL:
-
high light
- LL:
-
low light
- ML:
-
multidirectional light
- TC:
-
total carotenoids
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Tripathi, U., Sarada, R. & Ravishankar, G.A. Effect of culture conditions on growth of green alga — Haematococcus pluvialis and astaxanthin production. Acta Physiol Plant 24, 323–329 (2002). https://doi.org/10.1007/s11738-002-0058-9
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DOI: https://doi.org/10.1007/s11738-002-0058-9