Circadian period of autonomous flowering time pathway mutants Circadian period estimates for mutants in the autonomous flowering-time pathway and their respective wild-types. Period was assayed by rhythmic leaf movement in constant white light for approx. 1 week (n = 25–155). 1a) genotypes in the Col-0 genetic background. 1b) Genotypes in the Ws-2 background. 1c) Representative leaf movement traces of Arabidopsis mutant (white circles) and wild-type seedlings (filled triangles), imaged in constant dim white light for approx. 1 week.