Leaves are green because they contain chlorophyll. But in addition to the green pigment, there are many pigments in the leaves, such as red pigment, yellow pigment and so on. In autumn, the green pigment gradually fades, and the red pigment and yellow pigment are exposed, making the forest golden or fiery red, which is very beautiful. It turned out that in summer, the leaf worked very hard, but when the weather turned cold, it stopped working. The nutrients produced by the leaves are not sent to the branches and trunks, but deposited in the leaves. The chlorophyll of the leaves will also be destroyed, and mixed with the nutrients left in the leaves or the withered tea brown, so as to become a variety of beautiful colors.
Why does the leaf turn yellow? How does the leaf turn yellow in autumn
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