engleski

Zinc and sulfur effects on growth and nutrient concentrations in rocket

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, while nitrogen concentration was lowest at highest S and Zn concentrations.

Eruca sativa; chlorophyll; toxicity; sulfate deprivation

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