Figure 5.

The effect of nitrate on cyanide potential in sorghum plants at different developmental stages. A and B, Seeds were imbibed in water for 3 h, and seedlings were grown for the time periods indicated in water (⋄—⋄), 25 mm KCl (○—○), or 25 mm KNO₃ (×—×). C and D, Plants were grown for 35 d in soil. Watering was then continued with H₂O (⋄—⋄) or changed to 25 mm KCl (○—○) or 25 mm KNO₃ (×—×) for the time period indicated. The cyanide potential in the whole plant except roots was measured as described in “Materials and Methods.”