Characterization of MaPIP1;1 -overexpressing lines in Arabidopsis . Leaves from four week-old plants were sampled to detect the MaPIP1;1 copy number (A) and the expression of the transgene (B). Photographs (C) and statistical analyses (D) of primary root length of WT and transgenic lines under normal conditions. Photographs (E) and statistical analyses (F) of root hairs of WT and transgenic lines under normal conditions. Data are means ± SE of n = 4 biological replicates. Means denoted by the same letter do not significantly differ at P < 0.05 as determined by Duncan’s multiple range test.