Sequential expression of genes associated with specific biological processes under LD cycles. (A) Main clusters associated with biological processes, plotted according to their phase of expression. BFC cluster (BFC), number of gene probes in the cluster (Nb) and Phase of expression (Phase). Biological processes are represented by different colours. Black and yellow vertical bands represent night and light periods respectively. (B) Overview of the transcriptional regulations of the main biological processes during a light/dark cycle. During the night actors of transcription, translation and protein synthesis are sequentially transcribed. During the light period, genes of Photosynthesis and lipid metabolism are transcriptionally coregulated. DNA repair and photoprotection genes are found in midday clusters. At the end of the day, specific transcriptional networks are associated with DNA replication and mitosis.