Abstract
THE growth of lateral buds can be affected in plants by many different treatments1–3. Contrary to earlier proposals4 recent studies suggest that a principal controlling factor is the direct effect of auxin from the apex3,5,6. Other hormones may also play a part in the control of lateral bud growth. In peas7–9, indole acetic acid (IAA) and kinetin interact and exert opposing effects. Gibberellic acid (GA3) enhances apical dominance in the pea, possibly by its effect on IAA transport10; applied together with IAA to the cut surface of decapitated tomatoes it also enhances the effect of this substance in preventing lateral bud growth (unpublished results of H. F. Taylor). Gibberellins have also been implicated in apical dominance in soybean and redwood11.
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CATALANO, M., HILL, T. Interaction between Gibberellic Acid and Kinetin in Overcoming Apical Dominance, Natural and Induced by IAA, in Tomato (Lycopersicum esculenturn Mill. Cultivar Potentate). Nature 222, 985–986 (1969). https://doi.org/10.1038/222985a0
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DOI: https://doi.org/10.1038/222985a0
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