AP1 — Triticum turgidum subsp. durum

Summary

TRITD2AV1G147580 (AP1, TtAP1) on durum wheat chromosome 2A encodes a MADS-box transcription factor containing MADS-box and K-box domains, with RNA polymerase II-specific DNA-binding and transcription corepressor activities. The gene is associated with the regulation of vegetative-to-reproductive phase transition, vernalization response, inflorescence and floral meristem identity maintenance, fruit and floral organ development, and abscission. It has been linked to photoperiod-sensitive flowering time, heading date, grain weight, seed development, and responses to high temperature, UV light, and abiotic stress. Additional associations include root meristem size regulation, auxin transport, chloroplast development, anthocyanin content, and photosynthetic rate. Studies of related genes in other species connect the family to floral senescence, abscission, grain shape, tiller architecture, and reproductive transition.