TABLE 1.
Growth parameters of Prochlorococcus strains MIT 9302 and AS 9601 in laboratory experiments
| Strain | Light intensity (microeinsteins m−2 s−1) | Light-dark cycle (h:h) | Specific growth rate (μ d−1) | Division rate (div d−1) | % of cells that divided twicea |
|---|---|---|---|---|---|
| MIT 9302 | 30 | 13:11 | 0.48 | 0.69 | 0 |
| 40 | 13:11 | 0.73 | 1.05 | 4 | |
| 60 | 13:11 | 0.79 | 1.14 | 10 | |
| 100 | 13:11 | 0.97 | 1.40 | 32 | |
| 120 | 13:11 | 0.93 | 1.34 | 26.5 | |
| 40 | 14.5:9.5 | 0.99 | 1.43 | 34.5 | |
| AS 9601 | 60 | 13:11 | 0.82 | 1.18 | 13.5 |
| 120 | 13:11 | 0.84 | 1.21 | 16 | |
| 40 | 14.5:9.5 | 0.92 | 1.33 | 25.5 |
a
Computed from observed growth rate by assuming that, during ultradian growth, every cell divided at least once and some divided twice, producing four daughter cells.