Apical Dominance inMarsilea, with Particular Reference to the Effects of 3-Indolylacetic Acid,3-Indolylacetonitrile, and Coumarin on Lateral Bud Development

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Abstract
An account is given of the effects of 3-indolylacetic acid, 3-indolylaceto-nitrile, and coumarin on the development of the lateral buds of intact plants, decapitated plants, and excised nodes of Marsilea Drummondii in aseptic culture. In all the plant materials used, lateral buds grew out at all physiological concentrations of the two auxins, an observation which is considered to refute the hypothesis that correlative inhibition is caused by direct inhibition by auxi. Other hypotheses and recent work on the subject are also discussed.