Is there a reason why leaves will change color?
|Trees in winter|
Leaves will change their color during autumn because the tree itself will have to conserve water or survive better in the winter. To do that, the leaves will have to change color and then eventually fall off. That will reduce damage caused by insects during winter. In addition, the process of changing color and falling off can keep the tree from being damaged or destroyed completely.
What colors do the leaves turn? Why?
Red & Purple
Trees such as maples will have glucose trapped in the leaf after photosynthesis stops. When the nights are cool and little sunlight shows, the glucose will turn into a red or purplish color. That will make the leaf a red or purple color.
Orange is the color the green chlorophyll turns when it fades. Also there are carotene pigments in the leaf that make it orange.
Somewhat like the color orange, when the green chlorophyll fades, the yellow comes out due to xanthophyll pigments.
Brown is the color the leaf turns when there is waste left inside the leaf from glucose.
How did the colors get into the leaf?
What We See