Fig. 4
Examples of convergent change in diel transcript expression pattern in CAM species. a The four time-windows for comparative analysis of temporal changes in transcript expression, which were represented by 12 time points: 2, 4, …, 24 h after the beginning of the light period. b and c Comparison of diel transcript expression pattern of phosphoenolpyruvate carboxylase kinase 1 (PPCK1) and phototropin 2 (PHOT2), respectively, between CAM species (Kalanchoë fedtschenkoi and pineapple) and C3 species (Arabidopsis). Left panels show the diel transcript expression profiles. Right panels show enrichment triangle networks, in which a K. fedtschenkoi gene and a pineapple ortholog had significantly enriched expression in the same time-window, whereas an Arabidopsis ortholog had significantly enriched expression in the opposite time-window. The numbers are the time shifts in diel transcript expression pattern between genes connected by each edge. White and black bars indicate daytime (12-h) and nighttime (12-h), respectively. X-axis represents the time after the beginning of the light period
