They are chlorophyll, lutein, carotene, carotenoids and anthocyanins. In the growing season of the plant, due to the absolute dominance of chlorophyll, the leaves will be bright green, when the fall is approaching, the temperature drops, chlorophyll synthesis is blocked, containing lutein, carotenoids more leaves appear yellow.

And the red maple is a red leaf species, in the fall, the leaves produced a red pigment called anthocyanin glycosides, so that the leaves appear red, so the maple leaves in the fall after the chlorophyll reduction began to have green leaves slowly turned red, but also because of this unique red, the maple tree in the depression in the fall appears more hot and energetic, vibrant, with the ornamental value is also higher.