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One of the following phenomenon is responsible for the loss of liquid water through water secreting glands or Hydathodes

Question

One of the following phenomenon is responsible for the loss of liquid water through water secreting glands or Hydathodes

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Solution

The phenomenon responsible for the loss of liquid water through water-secreting glands or Hydathodes is known as Guttation.

Here are the steps explaining the process:

  1. Guttation usually occurs during the night or early morning when the atmospheric pressure is high and transpiration is low.
  2. During this time, the root pressure pushes water up from the roots into the xylem (a type of vascular tissue in plants).
  3. This pressure forces some water to exude through special leaf-tip or leaf-margin structures, known as hydathodes or water glands.
  4. The water, along with dissolved nutrients, is lost in liquid form. This is different from transpiration where water is lost in vapor form.
  5. When the water evaporates from the leaf surface in the morning, white crusts of minerals are left behind on the leaf surface. This is a clear indication of guttation.

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