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CBSE Class 10 Answered

Q.how does auxin regulate phototropism in plants?-3mks
Asked by deepitapai | 06 Jun, 2008, 11:31: AM
answered-by-expert Expert Answer

When growing plants detect light, auxin synthesised at the root tips, help the cells to grow longer. Also, if light comes from one side of the plant, auxin diffuses towards the shady side of the shoot. This concentration of auxin stimulates the cells to grow longer on the side of the shoot which is away from light.

Answered by | 11 Jun, 2008, 11:04: AM

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