RSR1 — Zea mays

Summary

ZmRSR1 (also known as ZmRAP2.7, TOE1) on maize chromosome 6 encodes a protein with an AP2/ERF domain and a DNA-binding domain, possessing transcription coactivator, corepressor, and blue light photoreceptor activities. It is associated with the regulation of starch biosynthesis, seed development and abscission, floral organ abscission, endosperm development, nitrogen utilization, and the photoentrainment of the circadian clock. The gene is linked to yield, seed size, grain filling, starch content, and flowering time. It is associated with seed quality, seed color, seed coat morphology, plant size, shoot system elongation, branch angle, and responses to light, temperature, aphids, and rice thrips. Localization evidence places the product in the cytosol, cytoplasm, transcription regulator complex, Cajal body, and SCF complex. Studies of related genes in other species link the family to photoperiodic flowering time control, trichome development, and defense responses.