Figure 1.

Response of starch synthesis to short days in clock and photoperiod mutants. For all experiments, values are means ± se of measurements made on six plants. A, Rosette starch content over 24 h in wild-type (Col-0 and Ws) and mutant Arabidopsis plants grown in 12:12 (white circle) or 6:18 (black square) conditions. The cca1 lhy double mutant is in the Ws background; other mutants are in the Col-0 background. See Supplemental Table S1 for calculated rates of starch synthesis. B, Starch contents at the end of the night (white and light gray) and after 6 h of the light period (black and dark gray) in wild-type (Col-0) and mutant plants grown in 12:12 (white and black) and 6:18 (light gray and dark gray) conditions. C, Starch contents after 6-h light in wild-type (Col-0) and cdf quadruple mutant plants grown in 12:12 (black) and 6:18 (gray) conditions. FW, Fresh weight.