ABS7 — Oryza sativa Japonica

Summary

OS01G0812000 (symbol ABS7, also known as GAMYB or OsMYB33) on rice chromosome 1 encodes a GAMYB-like transcription factor with sequence-specific DNA-binding and transcription-regulatory activity. The gene is associated with anther wall tapetum morphogenesis, floral organ senescence, regulation of pollen tube growth, starch breakdown, phospholipid anabolism, shikimate metabolism, and protein storage vacuole organization. It has been linked to grain length, grain size, grain yield, spikelet fertility, plant height, stem diameter, germination rate, seed dormancy, cold tolerance, aluminum tolerance, and anthesis time. Additional associations include male fertility, drought tolerance, ABA sensitivity, nitrogen deficiency response, root growth, and susceptibility to root-knot nematode. The protein localizes to the nucleus, pollen tube, and plant-type cell wall. Studies of related genes in other species connect the family to flowering time, gibberellin signaling, and salt tolerance.