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CBSE Class 10 Answered

how a auxin helps the shoot to curve in the direction of plant?
Asked by | 29 Aug, 2011, 12:00: AM
Expert Answer

Auxins play a part in phototropism, an occurrence that involves plants bending or moving away from light. The shoot tip is responsible for directional movement by the plant in response to sunlight, as this is the area where auxins can be found.

Sunlight eradicates auxin, meaning that the part of the shoot tip of the plant which is receiving direct sunlight will have the least amount of auxin. 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.

Answered by | 02 Sep, 2011, 07:39: PM
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