Table 1.

Growth parameters of Prochlorococcus strains MIT 9302 and AS 9601 in laboratory experiments

StrainLight intensity (microeinsteins m−2s−1)Light-dark cycle (h:h)Specific growth rate (μ d−1)Division rate (div d−1)% of cells that divided twicea
MIT 93023013:110.480.690
4013:110.731.054
6013:110.791.1410
10013:110.971.4032
12013:110.931.3426.5
4014.5:9.50.991.4334.5
AS 96016013:110.821.1813.5
12013:110.841.2116
4014.5:9.50.921.3325.5
  • 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.