Figure 1.

CS3227 has a short period. Seedlings were grown under 12L:12D cycles for 5 (A) or 7 (B−D) d before release into constant light for recording of circadian parameters. (A) Cotyledon movement for Col-2 and CS3227 seedlings. (B) Segregation of the short period phenotype in an F₂ population derived from a cross between CS3227 and a TOC1:LUC reporter in the Col-2 background. (C) Mean TOC1:LUC activity for Col-2 and CS3227 seedlings after release into constant light and temperature. (D) Mean TOC1:LUC period for Col-2, CS3227 F₃ lines and the short period mutants lhy-20 and toc1-101, under the same conditions as (B) and (C). All data shown as means ± SEM (n = 12−24).