Keywords: Tolerance, salinity, pecan seedlings and concentration.
. Searching for salt tolerant pecan rootstocks constitute and recommendable alternative, to achieve a profitable activity, in areas affected by soil salinity. The objective of this study was to evaluate the accumulation of ions in pecan seedlings at under different levels of salinity: 0, 750, 1000 and 1250 ppm of Na, Using NaCl as ingredient. RGR was obtained for height and diameter. Dynamics of defoliation was obtained as well. In lab were analyzed pH and Cl, Na, Ca, K, Zn, Mn, Fe and Cu concentrations in leaf, stem and roots. The salinity gradients affected diameter statistically, but not on height. However, RGR for both, height and diameter were reduced as salinity gradients in treatments were increased. Treatments did not affect pH in the organs, except in root of pecans with 1250 ppm. Defoliation as well as Cl and Na concentrations in the organs, increased as salinity levels increased. We assumed that the evaluated material, present a possible exclusion for Na in leaves. Ca, K, Zn, Mn, Fe and Cu concentration in leaves, stems and roots was not affected, except for the K in roots.