In the Northern Hemisphere spring is beginning to emerge from winter, heralded by the blooming of bright yellow daffodils.
The vibrant yellow color of yellow trumpet daffodils (Narcissus pseudonarcissus) is primarily caused by carotenoid pigments, specifically within the plastids of the flower petals and corona. These pigments, including beta-carotene, absorb blue-green light due to their conjugated double bond system, reflecting yellow and orange light.