Interaction of Indoleacetic Acid and Gibberellic Acid in the Short-Term Growth Kinetics of Oat Stem Segments

Abstract

Gibberellins and auxins are the only hormones known that promote growth in oat (Avena sativa) stem segments, but when applied together, indoleacetic acid inhibits gibberellic acid-induced growth appreciably. This study shows that in addition to this inhibitory role, indoleacetic acid shortens the response time of the tissue to gibberellic acid.