Table 1.
Doubling times for cultures grown in either a continuous or a light/dark cycle with different light intensities from 50 to 1500 μmol photons m−2 s−1. All samples were taken at mid log phase of the cultures and at the end of the light periods. Data are means of at least three experiments ± standard deviation.
| Light intensity (μmol photons · m−2 · s−1) | Doubling time |
|
|---|---|---|
| Continuous light | Light/dark period | |
| 50 | 198.0 (±19.1) | 63.0 (±11.2) |
| 200 | 28.0 (±2.8) | 23.3 (±2.1) |
| 500 | 7.5 (±0.1) | 6.4 (±0.2) |
| 1000 | 7.2 (±0.2) | 5.0 (±0.2) |
| 1500 | 6.5 (±0.3) | 4.2 (±0.1) |