Figure 6.

Effects of NAA on root system architecture of wild-type (Col-0), pft1-2, and 35S:PFT1 seedlings. Arabidopsis seeds were germinated and seedlings were grown for 7 d with or without NAA. A, Relative primary root growth. B, Lateral root number. C, Relative lateral root formation (fold induction). D, Lateral root density. Primary root lengths at 0 nm NAA were 26 mm for Col-0, 30 mm for pft1-2, and 19 mm for 35S:PFT1. Error bars represent se from 15 seedlings. Different letters indicate statistical differences at P < 0.05. The experiment was repeated two times with similar results.