Fig. 1. Regression of needle necrosis with shoot sodium and chloride concentrations, in 28-wk-old jack pine seedlings treated for 10 wk with consolidated tailings (CT) water. Solid squares represent Na concentrations, with a solid line indicating the regression line (y = -14.02 + 0.00336x, r² = 0.65). Open circles represent Cl concentrations, with a broken line indicating the regression line (y = -15.99 + 0.00391x, r² = 0.59).