Will the leaves of red maple turn red in the sun?

Maple leaves are red, not because they are red in the sun, but because the weather is getting cold. After the temperature dropped, the maple leaves slowly began to turn red. Often after the autumn rain, the weather turns cold, which is when the maple leaves turn seven times.

Maple leaves will turn red. The reason is that chlorophyll will accelerate decomposition in late autumn and early winter, and low temperature will affect the operation of plant nutrients. If the light intensity is white and the temperature drops suddenly at night, sugar will be converted into anthocyanins. The stronger the effect, the easier it is to form a red leaf landscape. If the temperature difference between day and night is not large, photosynthesis can not be sufficient, and only yellow leaf landscape can be formed, because there are more yellow leaves and fewer red leaves in some areas. It was not until the cold winter came that the maple leaves turned red. But the leaves turning red, orange and Huang Dou are warnings of the coming cold, so there is a saying that it is "quite critical". Leaves turn red, orange or yellow, which can absorb more heat, which is an adaptation of plants to the gradually cold weather.