<i>PTPLA</i> is expressed during root development.

<p>(A-T) Expression of GUS constructs under the control of <i>pPTPLA</i> (A-E), <i>pPAS2</i> (F-J), <i>pKCR1</i> (K-O) or <i>pKCR2</i> promoters (P-T) in 14 days-old Arabidopsis seedlings. GUS staining was observed in different organs: seedling apical part (A, F, K, P), hypocotyl/root transition (B, G, L,Q), root hair transition zone of the primary root (C, H, M, R), secondary root (D, I, N, S) and primary root tip (E, J, O, T). Scale: 50 μm (except pictures A, F, K, P: 2mm). n = 18. (U). Coexpression of <i>pPTPLA</i>:<i>mRFP1</i> and <i>pPAS2</i>:<i>GFP</i> in <i>A</i>. <i>thaliana</i> primary root. Images were taken from the tip (R1), the root hair initiation zone (R2), the lateral root initiation zone and lateral root emergence zone (R4). Scale: 50μm. (V) Effect of <i>ptpla</i> mutation of primary root length. Vertically grown 10 days-old seedling (top) and the corresponding primary root length (bottom). n = 43–57. Scale: 500μm. Significant differences were determined using the student’s t-test: *p<0,05, **p<0,01, ***p < 0.001.