Transcription factor that regulates asexual reproduction (PubMed:20495056). Binds the StuA-response elements (StRE) with the consensus sequence 5'-(A/T)CGCG(T/A)N(A/C)-3' at the promoters of target genes (By similarity). Required for pathogenicity and positively regulates the synthesis of the mycotoxin alternariol (PubMed:20495056). Acts as a positive regulator of Tox3 but is not required for the expression of ToxA (PubMed:20495056). Acts also as a central regulator of carbon metabolism including glycolysis, the TCA cycle, and amino acid synthesis (PubMed:20495056). Produces thick white aerial hyphae but impairs sporulation (PubMed:20495056). Affects the expression of genes involved in central carbon metabolism including glycolysis, the TCA cycle, and amino acid synthesis (PubMed:20495056). Decreases pathogenicity after inoculation of detached wheat leaves (PubMed:20495056). Belongs to the EFG1/PHD1/stuA family.