SHD — Asparagus officinalis

Summary

AoSHD (A4U43_C05F21140) on asparagus chromosome 5 encodes a heat shock protein 90 family member, containing Hsp90 and HATPase domains, with ATP-dependent protein folding chaperone activity. The gene is associated with diverse molecular functions including DNA polymerase, transcription regulator, and pectate lyase activities, and is linked to processes such as cellular response to unfolded protein, brassinosteroid stimulus, and double-strand break repair. AoSHD has been connected to numerous agronomically relevant traits including floral organ morphology, seed set percent, submergence tolerance, bacterial and viral disease responses, temperature stress response, photoperiod-sensitive flowering time, and seed viability. Studies of related genes in other species link the HSP90 family to thermotolerance, broad-spectrum disease resistance, salinity tolerance, and chloroplast function, though these associations are not yet established in asparagus.