HD5 — Oryza sativa Japonica

Summary

OS08G0174500 (HD5) on rice chromosome 8 encodes a protein with a histone-fold domain and DNA-binding transcription activator activity specific to RNA polymerase II. This gene is associated with chlorophyll a anabolism, de-etiolation, downregulation of long-day photoperiodism flowering, flower development, syngamy, and upregulation of unidimensional cell growth. It localizes to the nucleus, cytoplasm, and CCAAT-binding factor complex. HD5 is linked to panicle number, leaf width, panicle length, growth stage, days to heading, heterosis, grain number, grain weight, anthesis time, plant height, and grain yield. It is also associated with heading date, tillering, drought and salinity stress tolerance, cold tolerance, ER stress, and photosynthesis. Studies of related genes in other species connect the NF-YB/HAP3 family to drought tolerance.