AP1 — Triticum turgidum subsp. durum

Summary

TRITD1BV1G125730 (symbol AP1, also known as TtAP1) on durum wheat chromosome 1B encodes a protein with DNA-binding transcription factor activity, RNA polymerase II-specific DNA-binding, transcription corepressor activity, and protein dimerization functions. The gene is associated with floral whorl structural organization, stamen and carpel identity specification, fruit morphogenesis, seed growth, and meristem determinacy and maintenance. It has been linked to numerous traits including flowering time, photoperiod sensitivity, inflorescence and floral organ morphology, petal and sepal development, grain weight, heading date, drought tolerance, and responses to high temperature, UV light, and hormones such as cytokinin and brassinosteroid. Localization evidence places the product in the nucleus, cytoplasm, cytosol, and nucleolus. Studies of related genes in other species connect the family to flower senescence, abscission, grain shape, tillering, and reproductive transition.