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Effect of external S supply on leaf development in oilseed rape. Plants were grown continuously in nutrient solutions containing 20, 100, or 1000 μm SO42−. The effect of increasing SO42− concentrations was similar in all of the leaves, but for clarity only the length of the longest leaf is presented. Data represent the means ± se of four separate plants. The lsd (P < 0.05) for each time point is shown by vertical bars. •, 20 μm SO42−; □, 100 μm SO42−; ▴, 1000 μm SO42−.
