SHD — Solanum tuberosum

Summary

StSHD (PGSC0003DMG401006147) on potato chromosome 7 encodes a heat shock protein 90 (Hsp90) family member, containing Hsp90_N, Hsp90_C, and HATPase_C domains, and is annotated with ATP-dependent protein folding chaperone activity. In potato, StSHD is associated with temperature stress tolerance and PVY susceptibility. The gene is linked to diverse biological processes including cellular response to unfolded protein, double-strand break repair, proline metabolism, and respiratory burst involved in defense response. Associations extend to traits such as reducing sugar content, starch grain synthesis, plant fresh weight, root dry weight, seed set percent, submergence tolerance, and responses to bacterial, viral, and aphid challenges. Studies of related Hsp90 genes in other species connect the family to thermotolerance, broad-spectrum disease resistance, salinity tolerance, and chloroplast envelope maintenance, though these functions are not yet established in potato.