Which plant pigment is responsible for mediating photoperiodic responses such as flowering by absorbing red and far-red light?

💡 Solution & Explanation

Phytochrome is a blue-green protein pigment found in plants that absorbs red and far-red light, thereby regulating critical physiological events such as photoperiodic flowering and seed germination. Chlorophyll acts primarily as the main photosynthetic pigment harvesting visible light for energy conversion. Plant physiology questions regarding photoreceptors are standard in general science sections.