Phototropism is the directional growth or movement of an organism in response to light. It is a phenomenon commonly observed in plants, where the growth of stems or leaves is directed towards a light source. The perception of light occurs through specialized cells called photoreceptors, which trigger a response in the plant hormones that regulate growth and development. In phototropism, these hormones cause the plant cells on the side away from the light source to elongate, which results in the bending of the stem or leaves towards the light. Phototropism plays a crucial role in optimizing a plant's photosynthesis process by ensuring that its photosynthetic organs are properly exposed to light.
