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Briefly describe how phototropism leads to an altered growth response ?
2 Answers
- ?Lv 75 years agoFavorite Answer
It's to do with Auxins which are plant hormones that make some parts of a plant stem grow faster than others. The result is that the plant stem bends towards the light.
You may have noticed that a houseplant grows towards the window and turns its leaves towards the light. It does this because light coming from the window side of the plant destroys the auxin in that side of the stem. So growth on that side slows down.
On the shaded side of the plant there is more auxin. So growth on this side speeds up. The result is that the shoots and leaves are turned towards the light for photosynthesis.
