Correlative Inhibition of Lateral Bud Growth in Phaseolus vulgaris L. Isolation of Indoleacetic Acid from the Inhibitory Region

The young, growing leaves have been shown by excision treatmentsto be responsible for the correlative inhibition of lateralbud growth in Phaseolus vulgaris. The presence of indoleaceticacid in apical portions of the stem bearing young leaves hasbeen demonstrated by extraction and collection in agar (‘agardiffusion’) followed by purification and analysis by bioassay,chromogenic assay, and gas chromatography-mass spectrometry.The relevance of these results to the possible involvement ofindoleacetic acid in correlative phenomena is discussed