Phytochrome is a type of protein found in plants that helps them detect light. It plays a crucial role in regulating various growth and developmental processes, such as seed germination, flowering, and shade avoidance. Phytochromes can sense different wavelengths of light, particularly red and far-red light, allowing plants to adapt to their environment. When exposed to light, phytochromes undergo a structural change, activating signaling pathways that influence gene expression. This process helps plants respond to changes in light conditions, ensuring they grow optimally. By understanding phytochrome, scientists can improve agricultural practices and enhance crop yields.