Salinity is a major abiotic stress limits vegetable production in arid and semi-arid regions. Grafting is an effective strategy to improve salinity tolerance through rootstock-mediated regulation of water relations and selective ion transport. The present study evaluated five Solanum rootstocks for their effects on growth, physiological traits, and shoot and root ion partitioning in grafted eggplant under irrigation water salinity levels of ECiw 0.25 dS m 1 (control), 3.0 dS m 1, and 6.0 dS m 1. Increasing salinity reduced plant growth, biomass accumulation, leaf relative water content, photosystem II efficiency, and chlorophyll content. However, grafted plants of S.mel/S. mac and S.mel/S.tor performed better than non-grafted plants under salinity due to improved ion regulation. Under ECiw 6.0 dS m 1, S.mel/S.mac was the most efficient graft combination, exhibiting a two-fold increase in shoot K+ and K+/Na+ ratio and a two-fold reduction in Cl , along with a three-fold increase in root K+ and K+/ Na+, indicating superior ion regulation relative to non-grafted plants. This was followed by S.mel/S.tor, which displayed limited shoot ion regulation but strong root-level responses, with a three-fold increase in root K+, a two-fold increase in K+/Na+ ratio, and marked Cl exclusion (three-fold reduction), whereas non-grafted plants showed impaired ion homeostasis. These results indicate that grafting eggplant onto Solanum macrocarpon and Solanum torvum rootstocks enhances salinity tolerance and improves plant performance under saline conditions.