FIG. 3.

Colonies of E. huxleyi cells on agar plates. Late-log-phase cells (ca. 2 × 10⁶ C cells/ml) were diluted to 10⁻⁴, and 0.1 ml was plated on an F/50 medium plate and incubated photosynthetically for 72 h. Note the large number of colonies actually present (ca. 1,000) compared to the number expected (ca. 20) based on the original number of C cells plated, indicating production of multiple S cells from a given C cell during phase transition.