Unformatted text preview: • Apical Dominance: Auxin produced in apical buds tends to inhibit the activation of buds lower on the stems. This is known as apical dominance. Auxin promotes synthesis of strigolactones, growth regulators that repress lateral bud growth. This effect lessens with distance from the shoot tip. Cytokinins (another group of plant hormones moving upward from roots) counter the apical dominance effect of auxins and promote lateral bud development. There is also evidence that electrical signals may promote lateral bud formation in some plants. • Auxins also promote lateral and adventitious root development Auxin applied to shoots on left and center...
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- Fall '09
- Plant stem, Auxins, Phototropism uneven elongation