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−.