why do leaves change color?
The bright reds and purples we see in leaves are made mostly in the fall. In some trees, like maples, glucose is trapped in the leaves after photosynthesis stops. Sunlight and the cool nights of autumn cause the online slots leaves turn this glucose into a red color.
Carotenoids and another pigment, xanthophylls, are responsible for the yellow and orange colors in corn, carrots, pumpkins and daffodils, as well as leaves. (Xanthopylls are also found in egg yolk and human blood plasma.) They are present in leaf cells during the growing season, protecting chlorophyll from damage.