Stimulating effect of Al on rice plant growth.

<p>Relative growth of shoots (A; range: 100–159) and roots (B; range: 100–208), number of tillers (C; range: 2.8–10.0), and root volume (D: range: 0.63–2.75) of the Cotaxtla, Tres Ríos, Huimanguillo, and Temporalero rice cultivars under treatment with 0 (Control) and 200 μM aluminum (Al) for 20 days. The means of four plants ± standard error is shown. Different letters in each subfigure indicate significant differences (Tukey, <i>P</i> ≤ 0.05).