Why does a tree shed its leaves in autumn? Detailed answer

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Why does a tree shed its leaves in autumn? Detailed answer

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Why does a tree shed its leaves in autumn?

In our latitudes, the growing season ends in autumn, i.e., the time of tree growth. With a decrease in daylight hours, the process of photosynthesis stops (the formation of glucose and other nutrients in chloroplasts from water and carbon dioxide under the action of sunlight). Chlorophyll grains are destroyed, the leaves gradually turn from green to yellow. All life processes in the tree slow down, in particular, the process of water absorption by the root system and its evaporation from the surface of the leaves slows down, and the latter die off.

Fallen leaves protect the soil under the tree, and, consequently, the roots from drying out, and in frosty winters from freezing.

Author: Mendeleev V.A.

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