Figure 6. Mean mRNA expression patterns of circadian clock genes over a 24 h period under a SD photoperiod (12 h light/12 h dark)

Values show mean ? standard deviation (biological replicates, N = 3–4). (a) Photoperiod-sensitive plants and (b) auto-flowering plants. Circadian clock genes in order of expression peaks are CsLHY (purple), CsPRR37 (light blue), CsPRR95 (yellow), CsPRR3 (green), and CsTOC1/PRR1 (dark blue). White and gray bars represent white light and dark conditions, respectively. Gene expression is relative to the geometric mean of two reference genes, see Methods S3.