Circadian changes of cellulase activity. (A) Phase distribution of rhythmically expressed genes that were previously described to be upregulated upon growth of Neurospora on ground plant material or cellulose . The dotted line shows the expected phase distribution of the 72 genes on the basis of the phases of all rhythmic genes. Cellulase activity of (B)
wt and (C) ∆csp1 at different times of the day (± SEM, four to six experiments). *P <0.05, **P <0.01, ***P <0.001.