Table 1.
Pigments produced by C. vulgaris supplemented with various concentrations of Pyridoxal (vitamin B6).
| Vitamins Conc. µg/L | Pigments | Days | ||||||
|---|---|---|---|---|---|---|---|---|
| 3 | 7 | 9 | 11 | 16 | 20 | p-Value | ||
| Control | Chl a | 1.17 ± 0.06 bB | 3.12 ± 0.02 aB | 1.53 ± 0.08 bB | 3.06 ± 0.49 aB | 1.81 ± 0.05 bB | 1.79 ± 0.07 bB | ** |
| Chl b | 1.04 ± 0.05 B | 1.28 ± 0.09 C | 1.26 ± 0.06 B | 1.12 ± 0.35 B | 1.61 ± 0.14 B | 1.23 ± 0.04 B | NS | |
| Carotenoid | 10.65 ± 1.50 cA | 5.36 ± 0.29 dA | 10.88 ± 0.88 cbA | 17.48 ± 0.83 aA | 16.93 ± 0.29 aA | 13.53 ± 0.83 bA | ** | |
| p-Value | *** | *** | *** | *** | *** | *** | ||
| 0.02 | Chl a | 2.25 ± 0.48 abB | 1.63 ± 0.20 bB | 1.55 ± 0.03 bB | 2.83 ± 0.38 aB | 2.03 ± 0.27 abB | 2.24 ± 0.09 abB | * |
| Chl b | 0.93 ± 0.17 bB | 1.96 ± 0.26 bB | 2.10 ± 0.04 bB | 3.63 ± 0.43 bB | 6.42 ± 1.69 aB | 3.50 ± 0.43 bB | ** | |
| Carotenoid | 10.50 ± 1.24 bA | 7.75 ± 0.98 bA | 12.68 ± 0.34 bA | 24.12 ± 2.73 aA | 19.21 ± 2.96 abA | 12.42 ± 1.85 bA | *** | |
| p-Value | *** | *** | *** | *** | *** | *** | ||
| 0.04 | Chl a | 0.54 ± 0.14 cB | 1.30 ± 0.04 cbB | 1.24 ± 0.24 cbB | 2.57 ± 0.68 aB | 2.85 ± 0.36 abB | 2.27 ± 0.59 abB | ** |
| Chl b | 0.92 ± 0.37 cB | 1.45 ± 0.28 cbB | 1.43 ± 0.009 cbB | 2.81 ± 0.47 aB | 2.32 ± 0.18 abB | 1.38 ± 0.50 cbB | * | |
| Carotenoid | 9.19 ± 1.64 bA | 10.24 ± 1.72 bA | 10.32 ± 0.95 bA | 19.60 ± 1.50 aA | 15.42 ± 1.10 aA | 17.89 ± 2.32 aA | *** | |
| p-Value | *** | *** | *** | *** | *** | *** | ||
| 0.06 | Chl a | 0.28 ± 0.03 dC | 1.03 ± 0.07 cdB | 1.55 ± 0.08 cbB | 2.58 ± 0.55 aB | 2.18 ± 0.33 abB | 1.81 ± 0.14 abcB | ** |
| Chl b | 2.06 ± 0.63 abB | 1.46 ± 0.10 bB | 2.23 ± 0.17 abB | 2.54 ± 0.63 abB | 2.92 ± 0.122 aB | 2.51 ± 0.35 abB | * | |
| Carotenoid | 6.80 ± 0.47 bA | 12.31 ± 0.54 abA | 12.03 ± 0.59 abA | 12.10 ± 4.18 abA | 16.71 ± 1.39 aA | 15.43 ± 0.79 aA | *** | |
| p-Value | *** | *** | *** | *** | *** | *** | ||
| 0.08 | Chl a | 0.19 ± 0.06 cB | 2.58 ± 0.43 aB | 1.58 ± 0.62 abB | 1.41 ± 0.31 bB | 1.81 ± 0.60 abB | 1.64 ± 0.08 abB | *** |
| Chl b | 0.84 ± 0.40 dB | 1.17 ± 0.09 cdB | 1.99 ± 0.05 cbB | 2.45 ± 0.36 bB | 3.63 ± 0.65 aB | 2.72 ± 0.065 abB | *** | |
| Carotenoid | 5.20 ± 1.55 bA | 9.68 ± 1.53 abA | 11.25 ± 1.46 abA | 16.85 ± 4.50 aA | 11.28 ± 2.20 abA | 9.32 ± 1.30 abA | * | |
| p-Value | *** | *** | *** | *** | *** | *** | ||
Data are expressed as (mean values ± S.E.), rows showing different small letters (a, b, c) and column within each concentration showing different capital letters (A, B, C) are significantly different at (p ≤ 0.05). * p < 0.05; ** p < 0.01; *** p < 0.001. NS: non-significant.