Abscisic Acid in Tobacco Plants

摘要: In tobacco plants inoculated with the wilt-inducing bacterium, Pseudomonas solanacearum, there was a correlation between decreased internode elongation, maximum multiplication of and an increase in growth inhibitor content stems 4 to 12 days after inoculation, as determined by wheat coleoptile assay. Initial wilting upper leaves also correlated these tissues.Application either partially purified from or pure (+)-abscisic acid roots, terminal buds, petioles caused reduction length which lasted 8 10 following single treatment. Repeated treatment necessary obtain retardation over longer period time.The tentatively identified abscisic acid, based on comparison authentic paper, thin layer, column, gas-liquid chromatography. On basis optical rotatory dispersion, circular dichroism, ultraviolet spectra, indistinguishable acid. Increases infected tissues are attributed primarily although other substances, not separable procedures used, could play role. The found P. solanacearum culture medium.