The influence of interstock in anatomical and physiological leaf characteristics were evaluated in ‘Hass’, ‘Fuerte’, ‘Colín V-33’ and ‘Duke 7’ used as interstocks and final grafts. Stomatal density, epidermal cell density, stomatic index and stomata polar diameter were as¬sessed in leaf blade. In cross sections of the central vein and petiole of the leaf: area, perimeter, length of the minimum and maximum axis, roundness index and Feret diameter of xylem vessels were determined. Thickness of the upper and lower epidermis and thickness of palisade parenchyma I layer were measured in leaf cross sections. Physiological variables were CO2 assimilation rate, stomatic conductance, CO2 internal concentration, stomatic resistance, transpiration rate and leaf temperature. ‘Colín V-33’ as interstock induced higher stomatal and epidermal cell density and thicker palisade parenchyma I. In the intra genotype comparison, ‘Hass’ and ‘Fuerte’ with interstock increased stomatal density 18.8 and 17.8 %, respectively, while ‘Duke 7’ caused a 25.4 % reduction. Epidermal cell density increased in ‘Fuerte’ (23.3 %) with the presence of the interstock. ‘Fuerte’ and ‘Duke 7’ with interstock increased the thickness of the lower epidermis in 14.9 and 12.1 %, respectively, while ‘Hass’ and ‘Colín V-33’ with interstock reduced epidermis thickness by 19.5 and 1.0 %, respectively. ‘Hass’ as interstock promoted a higher CO2 assimilation rate than that promoted by ‘Duke 7’. ‘Colín V-33’, as a rootstock, showed lower stomatic resistance than ‘Duke 7’.