Table 3.

Morphology of Inflorescence Stems and Trichomes of the Wild Type and the fra2 Mutant

MorphologyWild Typefra2
Main inflorescence stema
    Height (cm)27.2 ± 3.313.6 ± 1.5
    Diameter (mm)b1.7 ± 0.42.5 ± 0.4
    Cauline branch number7.3 ± 1.86.9 ± 1.8
    Internode length (mm)
        First internode16.5 ± 10.25.0 ± 4.8
        Second internode20.2 ± 7.34.8 ± 4.1
        Third internode22.1 ± 9.76.4 ± 2.5
Trichome branch points (%)c
    No points0.117.5
    One point2.4164.9
    Two points79.725.6
    Three points17.81.9
  • a Data are mean values ±se from 10 (wild type) or 20 (fra2) plants.

  • b The first internode was used for measurement of the stem diameter.

  • c A total of 1000 trichomes on rosette leaves were counted. The nomenclature of trichome branch point is according to Luo and Oppenheimer (1999).