SHD — Solanum lycopersicum

Summary

SlSHD (SOLYC07G065840.2) on tomato chromosome 7 encodes a heat shock protein 90 (Hsp90) family member, containing Hsp90 and HATPase domains and annotated with ATP-dependent protein folding chaperone activity. In tomato, SlSHD is associated with yellow leaf curl virus response, salinity tolerance, heavy metal tolerance, root biomass, and developmental regulation. The gene is linked to diverse biological processes including cellular response to unfolded protein, defense-related respiratory burst, base-excision repair, vesicle organization, and long-chain fatty acid metabolism. It localizes to multiple cellular compartments such as the ER lumen, chloroplast outer membrane, plasma membrane, and vesicles. Associations with agronomic traits include floral organ morphology, seed set, fruit maturation, leaf water potential, temperature stress response, bacterial and viral disease responses, submergence tolerance, and aphid response. Studies of related genes in other species connect the family to thermotolerance, broad-spectrum disease resistance, plastid development, and mitochondrial function.