This page discusses the discovery of gibberellin by Japanese scientists in the 1930s and the subsequent isolation of related compounds post-WWII, including gibberellic acid (GA), which promotes rapid ...This page discusses the discovery of gibberellin by Japanese scientists in the 1930s and the subsequent isolation of related compounds post-WWII, including gibberellic acid (GA), which promotes rapid plant growth by altering gene expression. GA's mechanism involves inhibiting DELLA proteins that activate growth-related genes.