Transcription factor acting as central integrator of phosphate starvation responses (PubMed:20838596). Regulates FER1 expression upon phosphate starvation, linking iron and phosphate homeostasis (PubMed:23788639). Homodimers and heterodimers (PubMed:20838596). Interacts with MED25 (PubMed:21343311, PubMed:21536906). Does not interact with PHL2 or PHL3 (PubMed:26586833). Expressed in shoots and roots. Not up-regulated by Pi starvation. No effect on phosphate starvation responsiveness, due to the redundancy with PHR1. Belongs to the MYB-CC family.