AP1 — Hordeum vulgare subsp. vulgare

Summary

HORVU.MOREX.R3.4HG0412460, also known as HvAP1 or HvVRN1 on barley chromosome 4H, encodes a MADS-box transcription factor containing a MADS-box and K-box domain. The protein exhibits RNA polymerase II transcription regulatory region sequence-specific DNA binding, transcription corepressor activity, and protein dimerization activity. This gene is associated with the regulation of the transition from vegetative to reproductive phase, maintenance of inflorescence and floral meristem identity, fruit morphogenesis, carpel and integument development, and floral organ senescence. It has been linked to photoperiod-sensitive flowering time, spike length, leaf length, stem elongation, days to flowering, grain weight, heading date, drought tolerance, and responses to high temperature stress and UV light. The gene is also connected to vernalization response, inflorescence architecture, and root development.