Transcription factor involved in nitrate and phosphate signaling in roots. Integrates nitrate and phosphate starvation responses and adaptation of root architecture depending on nutrient availabilities. Acts downstream of the nitrate sensor and transporter NPF6.3/NRT1.1. Represses primary root development in response to phosphate deficiency conditions, only when nitrate is present (PubMed:25723764). Involved in the modulation of primary root and root hair growth in phosphate-deprived environement (PubMed:19341407). May be required for suppressing abscisic acid (ABA) signaling in germinating embryo axis, which promotes the timely germination of seeds (PubMed:22545134). Expressed in the root hair region and root hair cells. Induced by nitrate (PubMed:25723764). Down-regulated under nitrate deprivation conditions (PubMed:27419465). No visible phenotype under normal growth conditions. Plants over-expressing display increased susceptibility in primary root shortening under low phosphate conditions.