| Abstract: | This study was conducted to determine how the range of sulfur (S) supply (from deficient to luxuriant) interacted with possible toxic zinc (Zn) levels. Rocket seedlings were grown for 30 d at three Zn (1, 75, and 150 μM) and three S (0.03, 0.5, and 1.5 mM) concentrations in nutrient solution under controlled conditions. Plant leaves did not show symptoms of S deficiency or Zn toxicity, which was confirmed by pigment determination. Treatments affected only leaf area and shoot dry-weight percentage. The accumulation of Zn was greater in roots than in shoots and increased linearly with Zn supply. Shoot S concentration was affected by S deficiency, whereas nitrogen concentration was least at the greatest S and Zn concentrations. |
