Biology / Bio 2563 · Atom · ~20 seconds
Cytokinins
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Cytokinins promote cell division, delay leaf senescence, and counter auxin's suppression of axillary buds, working most strongly in actively dividing tissues such as roots and embryos.
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Applying cytokinin to a shoot promotes bushier branching by offsetting the axillary-bud suppression auxin otherwise maintains.
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Apical dominance results from a balance between auxin and cytokinin, not from either hormone acting in isolation.