Fig. 6

P concentration in cell wall pectin and pectin content. Seedlings were hydroponically treated with +P or -P solution for 7 d, and cell wall materials extracted from roots were fractionated into pectin, then the P concentration (a) and the uronic acid level (b) in the pectin were measured. Values are means ± SD, n = 4. Different letters on the bars indicate significant differences at p < 0.05