highly significantP ≤0.001
Mean charasome area fractions (percentage of cortical area occupied by charasomes) in cells investigated during the course of this study were 18.7 (±1.9 SD, n = 6) at the acid regions and 2.2 (±0.2 SD, n = 5) at the alkaline zones, and differences were highly significant ( P ≤0.001, t test).