Chlamydomonas reinhardtii cell cycle. Bright-field optical micrographs of cells. Cell cycle was divided into two phases: interdivision (left panels a, b, c, d, e and f) and division (right panels f, g, h, i, j and k). Interdivision phase consists of two subphases: ready-for-hatch (left panels a and b) and growth-after-hatching (left panels c, d, e and f). Division phase consists of five subphases: shrinkage (right panels f and g), rotation (right panels g and h), first mitosis (right panels h and i), second mitosis (right panels i and j), and mitosis-completion (right panels j and k). Images were acquired after long-term cultivation of cells under continuous light illumination (200 μmol m-2 s-1).