How does auxin promote phototropism
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Phototropism. Auxins also play a part inphototropism, an occurrence that involves plants bending or moving away from light. ... The extra auxin present on the shaded side promotes more cell division and elongation, causing the plant to bend towards the sunlight after this lop-sided growth.
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Well auxin has a tendency to go away from light.
So what happens is that the auxin hormone gets away from the light of the sun and gets towards the other side of the stem which is not facing the sunlight.
Also auxin helps in faster growth of the stem and thus the part where the auxin is more and deposited grows faster than the light facing side and thus due to the overgrowth of one side the stem becomes tilted or bend towards the side of the light and thus it shows positive phototropism.
So what happens is that the auxin hormone gets away from the light of the sun and gets towards the other side of the stem which is not facing the sunlight.
Also auxin helps in faster growth of the stem and thus the part where the auxin is more and deposited grows faster than the light facing side and thus due to the overgrowth of one side the stem becomes tilted or bend towards the side of the light and thus it shows positive phototropism.
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