Table 1.
The maximum value of biomass, biomass productivity, astaxanthin concentration, astaxanthin productivity, astaxanthin content, and astaxanthin content increase rate of the control- and treatment group under different IBDs.
| Parameters | IBD: 0.2 | IBD: 0.5 | IBD: 0.8 | |||
|---|---|---|---|---|---|---|
| Control Group | Treatment Group | Control Group | Treatment Group | Control Group | Treatment Group | |
| Biomass (g L−1) | 0.58 ± 0.06 | 0.92 ± 0.06 | 1.24 ± 0.13 | 2.02 ± 0.03 | 1.66 ± 0.08 | 2.62 ± 0.06 |
| Biomass productivity (g L−1 d−1) |
0.34 ± 0.04 | 0.44 ± 0.49 | 0.50 ± 0.08 | 0.66 ± 0.04 | 0.62 ± 0.04 | 0.72 ± 0.05 |
| Astaxanthin concentration (mg L−1) |
15.62 ± 1.35 | 32.26 ± 2.76 | 34.67 ± 2.91 | 72.51 ± 0.82 | 43.63 ± 3.03 | 87.35 ± 0.40 |
| Astaxanthin productivity (mg L−1 d−1) |
2.76 ± 0.33 | 5.42 ± 0.59 | 5.42 ± 0.05 | 11.36 ± 0.83 | 6.68 ± 0.66 | 12.37 ± 0.02 |
| Astaxanthin content (mg g−1) | 27.29 ± 0.67 | 35.29 ± 2.66 | 29.99 ± 1.43 | 38.02 ± 2.40 | 26.19 ± 0.59 | 33.35 ± 0.87 |
| Astaxanthin content increase rate (mg g-1 d−1) |
0.34 ± 0.01 | 0.54 ± 0.03 | 0.41 ± 0.10 | 0.74 ± 0.07 | 0.46 ± 0.06 | 0.65 ± 0.00 |
| Cell mortality rate (ca.%) | 25.85 ± 1.20 | 7.63 ± 3.35 | 23.14 ± 5.22 | 4.56 ± 0.27 | 19.08 ± 0.88 | 3.51 ± 2.48 |
The maximum value of each parameter was presented in the table. The cell mortality rate was obtained on day 8 of the red stage.