Fig. 3. Uptake activity of ammonium (A–C) and nitrate (D–F) in osdof18 mutants and WT.

A–B; Plants were grown on Yoshida medium with 1.44 mM NH₄NO₃ as sole N source; C–D; Plants were grown on Yoshida medium with 0.3 mM NH₄NO₃ as sole N source; E–F; Plants were grown on Yoshida medium with 5 mM NH₄NO₃ as sole N source. Closed circles, WT; open circles, osdof18-1. Error bars represent SE for at least 3 plants. ^*P < 0.05; ^**P, < 0.01.