The present study was aimed to investigate the effect of increasing sulfur concentrations in irrigation water in alleviating the adverse effect of chromium toxicity. The cultivated coriander seeds were treated with different concentrations of sulfate (0.4, 0.8 &1.6 mM magnesium sulfate) for 6 weeks until completely growth and ensure for healthy. Each treated group was divided into three subgroups to handle treatment concentration of 0 μM, 50 μM and 100 μM chromium. Stem and root lengths, fresh and dry weights, pigments, protein and chromium concentration were measured. The data showed that increasing chromium concentrations induced a significant decrease in the measured morphological and physiological parameters. Moreover, chromium was accumulated in coriander plant with increasing chromium concentration in irrigation water. Increasing sulfur concentration alleviates the adverse effect of chromium by increasing shoot and root lengths and dry weights. Also, sulfur increased pigment concentration in chromium treated plants to levels as those of control plants. The effect of sulfur was more effective at 50 µM Cr than 100 µM Cr. The two concentration of sulfur were both effective.
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