Studies on 3-Indoleacetic Acid Metabolism. II. Some Products of the Metabolism of Exogenous Indoleacetic Acid in Plant Tissues

Abstract
Salkowski-reactive substances accumulating in 12 species of indoleacetic acid-treated plants were investigated. At least 7 such substances were detected. Indoleacetamide predominated in grasses while indoleacetylaspartic acid predominated in legumes and in onion. Several plants contained an unidentified acid which gave an immediate pink color with the Salkowski reagent but reacted very weakly with p-dimethylaminobenzaldehyde (Ehrlich reagent). Very little of the indoleacetic acid which disappeared could be accounted for by either of these color tests.