Fig. 5.

Effects of 10 mm KCl, 10 mm KNO₃ and 5 mm KCl plus 5 mm KNO₃ on the growth rate of maize coleoptile segments incubated in the presence of 10 μm IAA added to the incubation medium at 2 h. Inset on the left presents medium pH changes for maize coleoptile segments measured simultaneously with growth. All curves represent means of at least nine independent experiments. Bars indicate ± s.e. The LSD test for growth is included in Supplementary Data Fig. S2.