May 17, 2025
Science

What exactly causes the lush green leaves of spring to turn yellow in the fall?

  • July 12, 2024
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Trees, like some animals, In winter it goes to rest. Of course, in such a situation it is inevitable that the leaves will wither. What we found for

What exactly causes the lush green leaves of spring to turn yellow in the fall?

Trees, like some animals, In winter it goes to rest. Of course, in such a situation it is inevitable that the leaves will wither.

What we found for you about this natural phenomenon There are several theories.

With the arrival of autumn, magical events take place in nature.

tree

As the days get shorter, we see that winter is coming and the leaves have put aside their former vibrant colors. One of the theories about this phenomenon is that the leaves influenced by chemical changes.

As the sunlight fades, The photosynthetic activities of plants also slow down. As the chlorophyll pigment decreases, the previously hidden anthocyanin pigment begins to appear in the leaves. This change causes green leaves to be replaced by shades of red, yellow, and orange.

Observations by the US National Forest Service also show that cold nights cause this color change as the leaf veins close.

In high altitude areas The fact that trees change color faster shows how this process takes shape depending on environmental factors such as temperature and humidity.

Research on this subject shows that there is a defense mechanism against insects behind the color change of leaves. Because insects hibernate in warm tree trunks They are attracted to the amino acids in the leaves.

These amino acids are released in the fall to protect the tree against insects It is said that it goes towards the branches and the trunk. This vision, which we watched with fascination, actually showed an evolutionary process.

Sources: Smithsonian, Forestry England

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