Table III.

Effects of localized NPA application on [3H]IAA movement

Treatment[3H]IAA Transported
cpmfmol
Control agar1501  ± 17561.4  ± 7.1
NPA agar1124  ± 5246.0  ± 2.1

Agar blocks containing [3H]IAA were applied to 4-d-old seedlings with and without NPA-containing blocks, and radioactivity in the roots was determined after 24 h. The reported values are averages ± se of four replicates, each containing five plants.

    • F2-a Using a Mann-Whitney U test, the differences in IAA are statistically significant (P ≤ 0.04).