Growth Substances in Corn Pollen.

Abstract
Acid and neutral fractions of the diethyl ether extracts of freshly collected corn pollen were separated by paper chromatography and assayed by the Avena straight growth method. The presence of 3-indoleacetic acid in the acid fraction was confirmed by biological assay and UV absorption spectra. Two other growth promoting substances were detected in the acid fraction. A single growth substance lacking an indole nucleus but having an absorption spectrum similar to that of benzoic acid was obtained from the neutral fraction.