What technique could a gardener use to invoke the growth of lateral buds on a plant, thereby making the plant
bushier? What will be an ideal response?
ANSWER: A gardener could snip off the tip of a plant's shoot (i.e., its apical meristem). If a shoot's tip
breaks off, its lateral buds begin to grow, an effect exploited by gardeners who pinch off
shoot tips to make a plant bushier. When a shoot loses its tip, it also loses its source of auxin.
The decrease in auxin stops the stem from lengthening, and the cytokinin level rises in the
stem. The cytokinin moves into lateral buds and stimulates cell divisions of apical meristem
inside them. These newly active meristem cells produce auxin, which is then transported
away from the bud tips and down the stem. This auxin flow causes the lateral buds to
lengthen.
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