Transcription repressor of phosphate (Pi) starvation-induced genes. Regulates negatively Pi starvation responses via the repression of gibberellic acid (GA) biosynthesis and signaling. Modulates root architecture, phosphatase activity, and Pi uptake and accumulation. Expressed in leaves and flowers. Slightly induced by salicylic acid (PubMed:16463103). Induced reversibly in response to phosphate (Pi) deficiency but repressed in the presence of Pi, specifically in the leaves. Availability of Pi increases with decreased levels (PubMed:19529828).