Differentially expressed genes may encode regulators of light-dependent differentiation.

Relative expressions of the genes (i.e. log2-normalized intensities scaled by gene) in the four conditions (16 hybridizations) were clustered and depicted by color scale, where shades of green and red represent under- and overexpressed genes, respectively. Homologues in N. crassa were identified by a bidirectional best-hit (BDBH) approach. Light-induced genes in B. cinerea and N. crassa are marked with orange asterisks. For more details see Table S3. (A) Expression of most photoreceptor-encoding genes is similarly induced by light in wild type and Δbcltf1 strains. All predicted photoreceptors were clustered. (B) Expression levels of 45 TF-encoding genes are altered in response to light or deletion of bcltf1. TFs that were differentially expressed in at least one condition were subjected to clustering.