Figure 1.

The root branching patterns of Arabidopsis are influenced by mutations that alter ethylene signaling and synthesis. (a) Roots 10 days after sowing are shown. (b) The number of emerged lateral roots in each genotype at 10 days after sowing. The average and SE of 30 seedlings is reported. (c) Images of roots that were grown for 5 days after sowing, before being transferred to control media or media containing 10 μm silver nitrate, and photographed after five additional days of growth.

P < 0.0005 by a Student’s t-test, as compared with untreated Col. Scale bars: 5 mm.