The Effects of Auxin on the Coordination of Plant Growth in Response to Light and Gravity

The video discusses the role of the plant hormone auxin in controlling plant growth in response to light and gravity. Auxin promotes cell elongation in shoots but inhibits it in roots. Phototropism is the growth of plants towards light, where auxin moves to the shaded side, causing the plant to bend towards the light. Gravitropism is the growth response to gravity, with shoots showing negative gravitropism by growing upwards and roots showing positive gravitropism by growing downwards. The unequal distribution of auxin leads to different growth rates in plant parts, directing their growth.

What happens to auxin levels when light is evenly distributed on both sides of a plant shoot?

Summarize how the unequal distribution of auxin leads to different growth rates in plant shoots and roots.