Table 2.
Effect of phosphorus on growth rate and toxin contents of semi-continuous cultures of different Aphanizomenon sp. strains.
| Strains | Conditions | µ a (d−1) | CYNin b (ng mm−3) | D-CYNin b (ng mm−3) | CYNex c (ng mm−3) | D-CYNex c (ng mm−3) | D-CYN d (%) |
|---|---|---|---|---|---|---|---|
| 10E9 | +P | 0.229 ± 0.027 | 431 ± 54 | 36 ± 8 | 78 ± 8 | 8 ± 2 | 8 ± 2 |
| −P | 0.122 ± 0.023 | 313 ± 38 | 44 ± 11 | 286 ± 49 | 81 ± 23 | 17 ± 3 | |
| 22D11 | +P | 0.247 ± 0.032 | 339 ± 26 | 87 ± 7 | 29 ± 3 | 11 ± 1 | 21 ± 2 |
| −P | 0.133 ± 0.102 | 8 ± 2 | 4 ± 2 | 219 ± 85 | 172 ± 68 | 44 ± 1 | |
| 30D11 | +P | 0.231 ± 0.054 | 559 ± 82 | 56 ± 18 | 151 ± 135 | 31 ±33 | 10 ± 2 |
| −P | 0.125 ± 0.040 | 589 ± 114 | 105 ± 22 | 320 ± 83 | 80 ± 24 | 17 ± 2 |
All values are means of 10 samples with confidence limits for p = 0.05; a Growth rate (d−1); b Biovolume related intracellular toxin contents; c Biovolume related extracellular toxin contents; d Share of total cylindrospermopsins.