Which type of plant hormone is primarily responsible for the bending of a plant shoot toward light?

Question

Quizplus · Accepted Answer

Auxin is the primary plant hormone responsible for phototropism, which is the bending of a plant shoot towards light. Auxin is transported from the brighter side of the plant to the darker side, leading to cell elongation on the darker side and ultimately causing the shoot to bend towards the light source. Ethylene, brassinosteroid, and systemin do not play a significant role in phototropism.

Which Type of Plant Hormone Is Primarily Responsible for the Bending