Figure 4.

Reduction of root meristem size after Al treatment.

(a) Five‐day‐old seedlings were transferred to 0 or 1.5 mm Al‐containing hydroponics (pH 4.2) and treated for 12 h. (b) Cortex cell number between the quiescent centre and the first elongated cell was counted after 12 h. Data are presented as mean ± SD in three independent experiments. Significant differences from wild‐type (WT) were determined by independent samples t‐test: *P < 0.05. (c) Root growth measurements of WT, cdkb1 and als3; 12 h Al‐treated seedlings were transferred to agar plates without Al and root lengths were measured for 5 days. Data are presented as mean ± SD in three independent experiments. Significant differences from WT were determined by independent samples t‐test: *P < 0.05.