Question

In a plant body, where are auxins synthesised? Briefly explain how auxins help in bending of a plant stem towards light.​

Answer 1

• It is synthesised primarily in shoot apical meristems and young leaves. ​

• Auxins are powerful growth-stimulants present more in actively growing regions like shoot apex, root apex, lateral meristems, and more. ​

• When plants detect light, auxin is synthesised at the shoot tip, and it helps the cells to grow longer. ​
  

• When light falls on one side of the plant, auxin diffuses to the shady side of the plant.​

• This increased concentration of auxin stimulates cells on the side of the shoot, that is away from the sun, to grow longer. ​

• As a result, the plant seems to bend towards the light.​