Short-term 109Cd accumulation in roots of durum wheat seedlings. Time-course of 109Cd accumulation in intact roots (A) of high (TL-H) and low (TL-L) Cd-accumulating isolines of durum wheat. Roots of 6-d old seedlings were exposed for up to 180 min in 15 mL of complete nutrient solution containing 50 pM 109Cd and 0.5 μM 65Zn. Desorbable 109Cd (B) was removed following treatment by a 30 min (2°C) wash in non-radiolabelled nutrient solution containing 50 μM DTPA. Inset shows desorbable 109Cd expressed as a percentage of total 109Cd accumulation in the roots. Means and standard errors of 5 replicates (3 plants per replicate) are plotted.