Figure 6.

Expression of the AtCKX3 gene leads to an increased nodulation in the root epidermis and to a decreased nodulation in the root cortex. Infection threads and nodules were counted on individual roots at 6 and 14 d post inoculation with S. meliloti, respectively, using roots transformed by A. rhizogenes with pEPI:CKX3 specifically expressing AtCKX3 in the root epidermis, or the corresponding control vector (A and C), or with pCO:CKX3 specifically expressing AtCKX3 in the root cortex, or the corresponding control vector (B and D). P = 0.1592 and 0.1658 in A and B respectively, and 0.00786 and 0.00010 in C and D, respectively (one-sided Welch’s test). Values shown are means of three biological replicates ± se.