Sweet lime (Citrus limetta) is one of the most sensitive species to salinity of soil and water, and under such conditions, drastic reduction of both vegetative and yield occurs. The present study was conducted to evaluate the effect of different rootstocks namely: Sour orange (C. aurantium), Sweet lime (c.limetta), Mexican lime (C. aurantifolia), volkameriana (C. volkameriana) and Bakraii (c.reticulate C. limetta) and salinity on changes in nitrate, proline and soluble protein in sweet lime leaf and root of rootstocks in glasshouse, using a factorial experiment in randomized completely design with four replications. The four levels of salinity imposed were: 0, 20, 40 and 60 mole L1-NaCl. At the end of experiment, levels of nitrate, proline and protein in leaves and roots were determined. Levels of nitrate, proline and protein varied among rootstocks even in control plants (no salt). Control plants had high levels of nitrate and low levels of proline in leaves and roots. Salinity decreased levels of nitrate in leaves and increased it in roots of all rootstocks. Proline levels were increased in leaves and roots with increasing of salinity levels. Under salinity stress, soluble protein levels were increased in leaves of scion among rootstocks and roots of all rootstocks but decreased at high salinity levels. Generally concluded that volkamer lemon, and to some extent Bakraii, could induce salinity resistance in Sweet lime scion.