[Common sense] Tree survival strategy, autumn leaves and leaves.

Trees get nutrients and grow through the photosynthesis of green pigments and chlorophyll.

This is why the leaves under the hot sun are green in spring and summer.In the fall of

, when the sunlight decreases and the temperature drops, the tree begins to prepare for winter.

First, a hard partition cell layer is formed between the leaf stalk and the branch,

Blocks the movement of nutrients and moisture, stopping the life activity of the leaves.

In winter, when sunlight and water are scarce, this is to save energy and withstand the fierce cold wave.

As a result, the green chlorophyll responsible for photosynthesis is destroyed.The yellow (carotenoid) and red (antocyanine) pigments, which were hidden in the chlorophylls
, are revealed, and autumn leaves are formed and fallen leaves are formed.

Fallen leaves decompose, nourishing the soil, and return to their roots.

Fall foliage and fall leaves are a tree's winter survival strategy.

Produced by Kim Tae-hyung [thkim@ytn.co.kr ]

AD: Shim Hye-min