ERD8 — Triticum turgidum subsp. durum

Summary

TRITD5AV1G157760, designated ERD8 (also known as HSP81.4, HSP90.2, and HSP82) on durum wheat chromosome 5A, encodes a heat shock protein 90 family member with ATP-dependent protein folding chaperone activity, transcription regulator activity, and ADP-ribosyl cyclase/cyclic ADP-ribose hydrolase activity. The gene is associated with powdery mildew resistance in durum wheat and has been linked to plant immunity, heat stress response, chilling-induced chlorosis, and chloroplast protein import. Associations include maturity time, photoperiod-sensitive flowering, reproductive growth traits, seed viability, and responses to various pathogens including downy mildew and Botrytis cinerea. The encoded protein localizes to the chloroplast outer membrane, ER lumen, and proteasome, and is linked to brassinosteroid signaling, auxin metabolism, and circadian clock photoentrainment.