HDAC9 and infection: Likewise, HDAC activity regulates the virulence in Cochliobolus carbonum on maize and the infection capacity of Rhynchosporium commune on barley, suggesting an importance of histone acetylation dynamics in the adaptation of fungi from diverse phyla to a pathogenic lifestyle (Baidyaroy et al., 2001; Siersleben et al., 2014).