As a seed germinates,its shoot points upward toward light,and its root grows downward into the soil.Turn the plant sideways,and the stem and roots bend according to the new direction of gravity.How do roots and shoots grow in opposite directions as the plant is rotated?

Question

Quizplus · Accepted Answer

Roots and shoots grow in opposite directions as the plant is rotated because they respond oppositely to the plant hormone auxin. In roots, auxin accumulates on the lower side of the root and inhibits growth, causing the root to bend towards gravity. In shoots, auxin accumulates on the upper side and promotes growth, causing the shoot to bend away from gravity.

As a Seed Germinates,its Shoot Points Upward Toward Light,and Its