Gravitropism

Light produces phototropism, while gravity produces gravitropism (also called geotropism). Shoots commonly grow towards light, where their leaves can receive light for photosynthesis. Roots commonly grow downwards, helping them reach water and minerals and anchor the plant.

Roots show positive gravitropism, growing in the direction of gravity; this helps to anchor the plant and places the roots in soil where they can absorb water and mineral ions. Roots generally show negative phototropism, growing away from light.

Light produces a phototropism, while gravity produces a gravitropism. These responses help shoots reach light for photosynthesis and roots grow into soil, where they anchor the plant and absorb water and mineral ions.

Shoots therefore show negative gravitropism: their growth is opposite to the direction of gravity.