Fig. 5

Developmental regulation of cell type specific genes expression. a Expression profiles of all cell-type specific genes. The gene expression level of each gene at each time point, as retrieved from [16] is expressed as fraction of the sum of its expression at all time points. Each grey line represents the expression profile of a single gene. The red line represents the expression average of all genes. b Cluster analysis of cup genes. The developmental expression profiles of cup genes were subdivided into 9 clusters by k-means clustering. The number of genes which belong to each cluster is shown in parentheses. The average trend is shown in red points and lines. See Additional file 1: Figure S2 for cluster analysis of spore, stalk and vegetative genes. c Cluster analysis summary. Most clusters showed peak expression at a single time point, or alternatively constitutive expression or a gradual increase. For each cell type, the number of genes with peak expression at 0, 2, 4 etc., hours or with constitutive or gradually increasing expression were expressed as percentage of the total number of specific genes for that cell type