Figure 6.

Relative viability of detached border cells from two snapbean cultivars after 8 (a) and 24 h (b) of exposure to increasing levels of Al (0, 25, and 50 μm) in 0.5 mm CaCl₂. Thickness of the mucilage layer around border cells from two snapbean cultivars (cv Dade and cv Romano) in response to increasing levels of Al (0, 25, and 50 μm) in 0.5 mm CaCl₂ at 8 (c) and 24 h (d) after initiation of treatments. For relative cell viability, significant Al (P = 0.0001), cultivar (P = 0.04), and hours of exposure (P = 0.002) effects were found. For thickness of mucilage layer, significant treatment (P = 0.0001), cultivar (P = 0.01), and treatment by hours of exposure interaction (P = 0.008) effects were found. Error bars represent ses of mean.