If a plant's shoot tip is removed, which of the following hormonal effects would most likely be diminished?
Understand the Problem
The question is asking about the hormonal effects that would be diminished if a plant's shoot tip is removed. Specifically, it is asking about the phenomenon of apical dominance and how removing the shoot tip (where auxin is produced) would affect lateral bud growth.
Answer
The production of auxins would be diminished, as they are produced in the shoot tip.
If a plant's shoot tip is removed, the hormonal effect that would most likely be diminished is the production of auxins. Auxins are produced in the shoot tip and inhibit the growth of lateral buds, so removing the tip reduces auxin levels.
Answer for screen readers
If a plant's shoot tip is removed, the hormonal effect that would most likely be diminished is the production of auxins. Auxins are produced in the shoot tip and inhibit the growth of lateral buds, so removing the tip reduces auxin levels.
More Information
The phenomenon where the main central stem of a plant is dominant over (i.e., grows more strongly than) other side stems is known as Apical Dominance. Apical dominance is the result of auxins, which are plant hormones produced in the shoot tip.
Tips
A common mistake is to confuse the effect of removing the shoot tip (decreased auxin) with the resulting growth of lateral buds. The question asks about the diminished hormonal effect, not the plant's response.
Sources
- Describing the Effects of Shoot Tip Removal When gardeners pinch off the shoot tips, they remove the primary source of auxins. This action decreases the auxin levels, thus diminishing their inhibitory effect on lateral bud development. As a result, lateral buds start to grow and the plant becomes bushier. - VAIA - vaia.com
- Apical Dominance - an overview | ScienceDirect Topics - sciencedirect.com
- Apical dominance: Current Biology - Cell Press - cell.com
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