Table 1.

Root Hair Number in Wild-Type and Mutant Plants with Ethylene Precursor or Inhibitor Treatment

Percent of Total Root Hair CellsaPercent of Root Hair Cells in the N positionb
PlantNo TreatmentACC (5 μM)AVG (5 μM)1-MCP (1 μL/L)No TreatmentACC (5 μM)
Columbia51.1 ± 3.365.9 ± 5.81.3 ± 2.344.0 ± 4.21.1 ± 3.315.9 ± 5.8
etr1-145.8 ± 6.748.1 ± 3.70 ± 043.0 ± 2.72.7 ± 3.32.5 ± 4.6
etr251.3 ± 2.351.5 ± 3.40.6 ± 1.848.3 ± 2.51.3 ± 2.31.5 ± 3.4
ers155.4 ± 6.252.5 ± 4.20.6 ± 1.849.5 ± 2.75.4 ± 6.22.5 ± 4.2
ers2-150.0 ± 3.055.0 ± 8.20 ± 044.1 ± 3.80.8 ± 1.96.4 ± 8.5
ein450.4 ± 1.457.2 ± 8.70 ± 042.3 ± 3.50.4 ± 1.47.2 ± 8.7
ein2-148.8 ± 3.845.8 ± 2.00 ± 0N.D.c2.5 ± 3.40 ± 0
ctr1-165.0 ± 6.4N.D.0 ± 0N.D.15.0 ± 6.4N.D.
eto263.8 ± 4.8N.D.0 ± 0N.D.13.8 ± 4.8N.D.
etr1-750.7 ± 5.1N.D.N.D.N.D.0.7 ± 5.1N.D.
rhd60 ± 037.6 ± 13.9N.D.N.D.0 ± 03.7 ± 6.6
  • a Percentage of root hair–bearing epidermal cells among total epidermal cells counted, including cells in both the H and N positions.

  • b Percentage of root hair–bearing epidermal cells at the N position among total epidermal cells counted.

  • c N.D., not determined.

  • Values shown are means ± sd (n = 140 to 260).