PHL1 — Oryza sativa Japonica

Summary

Os03g0329900 (PHL1, also known as OsPHR1, OsPHR2, PHL4) on rice chromosome 3 encodes a protein with a Myb/SANT domain and PHR1-like domain, possessing DNA-binding, transcription coactivator, and SUMO transferase activities. The gene is associated with phosphorus utilization, phosphate starvation responses, and regulation of phosphate transport, as well as nitrogen and sulfate homeostasis, strigolactone and glycerolipid anabolism, and phospholipid breakdown. It is linked to traits including phosphorus concentration and uptake, root architecture, yield, seed protein content, panicle length, and responses to arsenite, high light, and salicylic acid. The gene localizes to the nucleus, cytoplasm, and plasma membrane. Studies of related genes in other species link the family to phosphate signaling, photosynthesis efficiency, and drought response.