The respiration and flower development of evergreen azaleas as influenced by gibberellin, scale removal, and 2, 4-dinitrophenol

Abstract

Scale removal had little effect on time of flowering of Erich Schaame azalea flowers whether or not the azalea plants had been sprayed with gibberellic acid (GA3). Apparently the scales acted as a barrier to oxygen diffusion. GA3 treatments induced earlier flowering and an increase in oxygen uptake of the flowers. 2, 4-Dinitrophenol was more effective in stimulating the oxygen uptake of check flowers than in stimulating the oxygen uptake of GA3-treated flowers. DNP retarded the rate of flower development of GA3-treated flowers, but not of check flowers.