Table I.

Root-hair formation and GL2-promoter activity in roots and hypocotyls of mutant and transgenic Arabidopsis seedlings

GenotypeHair Formation-aEctopic Root-Hair Cells-bProportion of Wild-Type GUS Activity-c
RootHypocotyl
no. mm−1 %
Landsberg (wild type)61  ± 64
ttg-1124  ± 12470.29  ± 0.080.09  ± 0.06
ttg-w 94  ± 11 28 0.59  ± 0.15 0.25  ± 0.08
ttg-398 116  ± 19 44 0.36  ± 0.10 0.16  ± 0.09
35S::R 15  ± 6 6 0.78  ± 0.24 1.05  ± 0.18
gl2–1 132  ± 19 52 0.94  ± 0.20 1.21  ± 0.15
ttg-1 gl2–1 136  ± 20 56 n.d.-d n.d.
gl2–1 35S::R 110  ± 25 41 n.d. n.d.
  • F0-a Means ± sd.

  • F0-b Percentage of the root-hair-bearing cells that are located over a periclinal cortical cell wall (ectopic position).

  • F0-c GUS activity per milligram of protein in the mutant relative to the wild type within a common pool of F2 seedlings containing the full-length 4-kb GL2promoter::GUS fusion. Values are means ± sd.

  • F0-d n.d., Not determined.