Article Effect of gibberellic acid on the growth and anatomy of Coleus blumei, Antirrhinum majus and Salvia splendens
J. M. Bostrack, B. E. Struckmeyer
Summary New Phytologist (1967) 66: 539 – 544 doi: 10.1111/j.1469-8137.1967.tb05425.x
Plants of Coleus blumei (Coleus), Antirrhinum majus (snapdragon) and Salvia splendens (Salvia) exhibited three common responses to foliar applications of 50 mg/l aqueous solution of gibherellic acid (GA); elongation of the internodes, hyponasty and chlorosis. Elongation of subapical internodes was a result primarily of cell division in both Antirrhinum majus and Salvia splendens. Gibberellic acid at 500 mg/l caused less elongation of the sub-apical region than at 50 mg/l and 100 mg/l in S. splendens. Treated plants had a smaller stem diameter and more xylem parenchyma. Coleus blumei cuttings showed reduced rooting when treated with 50 mg/l GA.