A, Genes downstream of Os07g39940 identified via experimental flow chart procedures. B, Real-time RT-qPCR analysis of 3 genes up-regulated in Os07g39940-OX. C, Real-time RT-qPCR analysis of 3 peroxidase genes up-regulated in Os07g39940-OX. Expression of Os03g25300, Os07g01410, and Os07g44460 in root hairs from wild type, knock-out mutant of Os07g39940, and Os07g39940-OX are shown. Error bars represent means ± se (n = 4 replicates, root hairs sampled from more than 700 seedlings). *, **, and ***Relative expression differs significantly from level in wild type at 0.01 < P-value ≤ 0.05, 0.001 < P-value ≤ 0.01, and P-value ≤ 0.001, respectively, based on Student’s t test.