apical dominance


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apical dominance

a condition in plants where the stem apex prevents the development of side shoots from lateral buds near the apex. The dominance is controlled by the presence of high concentrations of plant hormones (AUXINS) at the apex, produced by the apical bud. Further down the stem the auxin concentration is reduced and strong lateral branches are formed. Pruning of the apical bud in, for example, rose bushes, causes lateral branches to develop.
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