Figure 6.

Effects of exogenous auxin on wild-type (Ws) and lpr1-2 root development in low and high P. A, Mean primary root length of Ws and lpr1-2 seedlings grown on 2,4-D. Seedlings were transferred at 5 d after germination from auxin-free media to media containing varying concentrations of 2,4-D. Primary root length was recorded 5 d after transfer. B, Mean lateral root density of Ws and lpr1-2 seedlings grown on 2,4-D. Plants were transferred at 5 d after germination from auxin-free media to media containing varying concentrations of 2,4-D. Lateral root density was recorded 9 d after transfer (n = 15).