Gibberellin A1 is a plant hormone that has been found in Phaseolus multiflorus and has growth stimulatory activities.1,2,3 It reverses inhibition of spinach stem elongation induced by the plant growth retardants AMO-1618 or BX-112 .2 Gibberellin A1 increases hypocotyl, but not radicle, growth of cucumber seedlings when used at concentrations of 30 and 100 µM.3
1.MacMillan, J., Seaton, J.C., and Suter, P.J.Plant hormones—I: Isolation of gibberellin A1 and gibberellin A5 from Phaseolus multiflorusTetrahedron11(1-2)60-66(1960) 2.Zeevaart, J.A., Gage, D.A., and Talon, M.Gibberellin A1 is required for stem elongation in spinachProc. Natl. Acad. Sci. USA90(15)7401-7405(1993) 3.Halevy, A.H., and Cathey, H.M.Effects of structure and concentration of gibberellins on the growth of cucumber seedlingsBot. Gaz.122(1)63-67(1960)