Biology / Unit 11 Bio 2563 short lesson, about 20 seconds
Cytokinins
Captions available
The idea
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.
In practice
Applying cytokinin to a shoot promotes bushier branching by offsetting the axillary-bud suppression auxin otherwise maintains.
Where people slip
Apical dominance results from a balance between auxin and cytokinin, not from either hormone acting in isolation.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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