Question

Листья с восковым налетом испаряют в сутки на 1 см2 поверхности 3,6 г воды. Листья без воскового налета испаряют в сутки с такой же поверхности 4,03 г воды. Каково значение воскового налета на листьях в жизни растений? Преимущественно какие растения его имеют?

Answer 1

Восковой налет представляет собой покровный слой воска на листьях , он нужен растениям , так как он защищает нежную ткань листьев от механических повреждений , а так же самое главное от излишнего испарения, листья капусты, сосны, ириса  имеют его 

Answer 2

Understanding the Impact of Waxy Coating on Leaves' Water Evaporation

The presence of a waxy coating, or cuticle, on the surface of leaves plays a significant role in regulating water evaporation. Let's delve into the details.

Effect of Waxy Coating on Water Evaporation: The waxy coating on leaves, known as the cuticle, serves as a protective layer that helps reduce water loss through evaporation. This cuticle acts as a barrier, preventing excessive transpiration and aiding in the conservation of water within the plant.

When leaves have a waxy coating, the rate of water evaporation is lower compared to leaves without this protective layer. This is evident from the fact that leaves with a waxy coating evaporate 3.6 grams of water per day from a 1 cm2 surface area, while leaves without the waxy coating evaporate 4.03 grams of water per day from the same surface area.

Significance of Waxy Coating for Plants: The presence of a waxy coating on leaves is particularly advantageous for plants in various ways. It helps in reducing water loss, especially in arid or dry environments, thereby contributing to the plant's ability to maintain adequate hydration levels. Additionally, the waxy coating provides protection against environmental stressors, such as extreme temperatures and UV radiation, further enhancing the plant's resilience.

Prevalence of Waxy Coating: Waxy coatings are commonly found on the leaves of plants that inhabit dry or arid regions. These plants have evolved this adaptation to cope with the challenging environmental conditions characterized by high evaporation rates and limited water availability. Examples of such plants include various species of succulents, desert shrubs, and drought-resistant flora.

In conclusion, the waxy coating on leaves significantly influences the rate of water evaporation and plays a crucial role in the adaptation of plants to arid environments, contributing to their survival in challenging ecological conditions.

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