Figure 3.

In Vivo Labeling of IAA and OxIAA.

The incorporation of [¹⁵N₁]anthranilate (A) and [¹⁵N₁]indole (B) into IAA (closed triangles) and oxIAA (open triangles) was monitored after feeding 7-DAG wild-type Arabidopsis Col-0 seedlings with liquid medium containing 10 μM of the labeled precursor for 3, 6, 12, and 24 h. Enrichment of the IAA and oxIAA pools is expressed as the isotope ratio, the ratio of labeled to unlabeled compound, after correction for natural isotope abundances. Error bars indicate sd (n = 3).