Tsung T. Lee, A. Starratt
1986
Citations
1
Influential Citations
13
Citations
Journal
Phytochemistry
Abstract
Abstract 2,6-Dihydroxyacetophenone and five structurally related compounds were tested for their effects on metabolism of[2- 14 C]IAA in stem segments of 3-week-old American germander ( Teucrium canadense ). Pre-treatment of the plants with 2 mM 2,6-dihydroxyacetophenone for 12 hr significantly reduced the formation of two radioactive metabolites, which were tentatively identified as N -(indole-3-acetyl)- L -aspartic acid and N -(indole-3-acetyl)- L -glutamic acid. The chemical pre-treatment also decreased the level of a less polar metabolite chromatographically indistinguishable from oxindole-3-acetic acid, an oxidative product of IAA, and other unidentified metabolites of IAA. Concomitantly, the level of free [2- 14 C]IAA increased significantly in the treated tissue. 2,4-, 2,5- and 3,4-Dihydroxyacetophenones, as well as 3-bromo-2,6-dihydroxyacetophenone and 2-hydroxy-6-methoxyacetophenone, did not show a similar effect.