Figure 5.

Suppression of auxin-inhibited root growth by JA-Trp and IAA-Trp. A, Seedling root length was measured after 7 d of growth on MS agar plates with 2 μm IAA plus the indicated amount of conjugate or Trp. Values are the means (n = 19) with se. B, Efficacy of Trp conjugates with other auxins was tested as above with auxins at the indicated concentrations with the indicated conjugates. Root lengths were measured after 8 d of growth, and values are the means (n = 21 seedlings) with se. IBA, Indole-3-butyric acid; 2,4-D, 2,4-dichlorophenoxyacetic acid.