Figure 4.

Effects of the sln mutation on [¹⁴C]GA₁ metabolism in decapitated peas. Shown is the [¹⁴C]GA₁ metabolism in decapitated sln (A) and decapitated SLN (B) peas. Plants were decapitated above node 10, left for 19 h, and then treated with [¹⁴C]GA₁ at a rate of 80,000 dpm plant⁻¹ on leaf 9 in 10 μL of ethanol. Five hours after application of [¹⁴C]GA₁, the treated leaf was excised, and internode 9-10 was harvested 9 h after application. [¹⁴C]GAs were chromatographed as methyl esters. Data are shown as the percentage of total radioactivity in the HPLC run. Identities of peaks are indicated.