Question

Write the role of Auxins in phototropic movement.

Answer 1

Auxins promote stem elongation, inhibit growth of lateral buds (maintains apical dominance). They are produced in the stem, buds, and root tips. ... This produces a curving of the plant stem tip toward the light, a plant movement known asphototropism. Auxin also plays a rolein maintaining apical dominance

Answer 2

As the light drops on the tip of the plant where Meristematic activity is going on , the plant makes auxin on one side and turns the plant tip to the direction of the light !!