What is the significance of perennial shedding of leaves?

The shedding of leaves by perennial plants is called leaf fall. Plants shed their leaves when a dormant period occurs in their life. The rest period is preceded by such factors as lack of sunlight, temperature drop, lack of moisture. During the dormant period, the processes of nutrition and water exchange slow down or completely stop in plants. If the plants did not shed their leaves in winter, they would simply die, because moisture evaporates through the leaves, and there is no way to take moisture from the soil in winter – water freezes in frosts.

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