Figure 8.

Effects of NPA on root architecture in wild-type (Col-0), pft1-2, and 35S:PFT1 seedlings. Arabidopsis seeds were germinated and seedlings were grown for 8 d with or without NPA. A, Relative primary root growth. B, Lateral root number. C, Relative lateral root formation. D, Lateral root density. Primary root lengths at 0 µm NPA were 38 mm for Col-0, 40 mm for pft1-2, and 27 mm for 35S:PFT1. Error bars represent se from 15 seedlings. Different letters indicate statistical differences at P < 0.05. The experiment was repeated three times with similar results.