AP1 — Triticum turgidum subsp. durum

Summary

TRITD5AV1G245590 (AP1, also known as TtAP1) on durum wheat chromosome 5A encodes a K-box domain-containing protein with RNA polymerase II-specific DNA-binding and transcription corepressor activity. The gene is associated with the specification of floral organ, ovule, stamen, and carpel identity, as well as inflorescence and floral meristem maintenance, fruit morphogenesis, and floral organ senescence. It is linked to the regulation of vernalization response, auxin polar transport, root meristem size, and photomorphogenesis. Associations with agronomic traits include flowering time, heading date, grain weight, reproductive period, inflorescence development, seed growth, and drought tolerance. The protein localizes to the nucleus, cytosol, and nucleolus. Studies of related genes in other species link the family to petal and sepal development, inflorescence architecture, and floral meristem identity.