Figure 1.

Kinetics of short-term Mn uptake by roots of wild-type (square symbols) and mtp8.2i/mtp8.1 (triangle symbols) plants. Seedlings were exposed to 0.5 mM CaCl₂ solution containing varying concentrations of Mn (0.5, 2, 10, 50, 100, and 200 μM) for 3 h at 30°C or 4°C temperatures. Net root Mn uptake (A) and Mn transfer to shoot (B) were calculated by subtracting values at 4°C from those at 30°C. Data represent the mean ± SD (n = 3). **P < 0.01, *P < 0.05, Tukey's test.