(a), Rhythmic cell amplitudes per section imaged with amplitude of the mean trace overlaid (green line). Whiskers represent 9th and 91st percentile. (b), Between-cell and within-cell period variability in each section. (c), Scatterplot of the rhythmic cells in all imaged plant sections stitched together. Colour indicates the maximum expression value. (d), Scatterplot of the maximum expression values vs. longitudinal position on the plant measured from the root tip. Colour legend is same as (c). (e), Scatterplot of the rhythmic cells in stitched plant sections. Colour indicates the oscillation period. (f), Scatterplot of the period values vs. longitudinal position on the plant measured from the root tip. Colour legend is same as in (e). (g), Sequential montage of the normalised CCA1-YFP expression of rhythmic cells from WT CCA1-YFP repeat. Both colour intensity and spot size indicate expression level. By colour, red indicates low and yellow high intensity. Scale bar represents 0.25 mm. For root tip, n = 200 root (up from tip), n = 46 root (section 1), n = 25 root (sections 2,3,4), n = 70 hypocotyl (section 1), n = 31, hypocotyl (section 2), n = 22; cotyledon, n = 100), n = the number of rhythmic cells.