Figure 1.

Short-term (180-min) time course of Al accumulation in the cell wall (total and nonexchangeable) of single cells of C. corallina as measured by ²⁷Al-GFAAS. Single cells were mounted in each of 15, three-compartment chambers, with the center compartment containing 110 mL of 50 μm AlCl₃ in 0.4 mm CaCl₂ (pH 4.3). Following the uptake period, isolated cell walls were desorbed for 30 min in 1.0 mm citric acid (pH 4.3; 4°C) to estimate nonexchangeable Al. Values represent the means ± se of three replicates. Al in protoplasmic fractions was not detectable using ²⁷Al-GFAAS.