When autumn comes, there will be a magical change in the trees all over the mountains. When many people see that the original green leaves in summer gradually become bright red or yellow, which is pretty, and then gradually fade away. People can't help asking why the leaves turn yellow in autumn? Let's discuss it with this question.
Why do leaves turn yellow in autumn? All leaves contain green chlorophyll. Trees use chlorophyll to capture light energy and store it in the form of sugar and other chemicals with the help of other substances in the leaves. In addition to chlorophyll, many leaves also contain yellow, orange and red and other pigments. Although these pigments can't photosynthesize like chlorophyll, some of them can transfer the captured light energy to chlorophyll. In spring and summer, the content of chlorophyll in leaves is much more than that of other pigments, so the leaves show the green color of chlorophyll, but can not see the color of other pigments.
When autumn comes, the days become shorter and the nights lengthen, and trees feel the climate change from autumn. So that a large number of their own chlorophyllin green chlorophyll covered, people naturally see the leaves become red or yellow. In autumn, deciduous trees stop growing and only need a small amount of nutrients to survive. Before defoliation, the tree trunk first decomposes chlorophyll, and the decomposed materials are transported from the leaves to the roots as winter nutrients. After the decomposition of chlorophyll, the leaves are left with heme, so you can see the leaves turn from green to yellow.
Conclusion: how do you think nature is magical after reading this article? But with the development of human industry, destroying the environment makes the four seasons climate more and more unstable. Such beautiful scenery may not exist in the future, so we should consciously care for the environment and nature, starting from me!
Maple leaves in autumn