Question:

Girdling experiment is not successful in monocots due to

Updated On: Jun 26, 2023
  • Non-arrangement of vascular bundles in a ring
  • Arrangement of vascular bundles in a ring
  • Radial vascular bundles
  • None of the above
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Approach Solution - 1

Girdling experiment is not successful in monocots due to vascular bundles not arranged in a ring
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The ringing experiment is another name for the girdling test. The bark, phloem, and cortex, but not the xylem, are among the tissues outside the vascular cambium that are being removed in this experiment. The tissue that joins the top and bottom parts of the plants, or the girdle, is known as the xylem. This is placed in a beaker of water, and after some time, it becomes apparent that swelling and the creation of a ring are caused by the accumulation of food material in the plant's top half. The plant dies over time because it depends on the root for the sap ascent, which occurs after a few days when the phloem, the tissue responsible for delivering nourishment, is absent. Large fruit-bearing plants are produced primarily using this method. The girdling limits the flow of nutrients to the root, and the starch generated by the leaves is utilized to grow bigger fruit rather than being stored in the root.
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Concepts Used:

Transport in Plants

The two types of conducting tissues that are used to transport the water and minerals in plants such as:

Xylem:

Xylem is a long, non-living tube running from the roots to the leaves via the stem. The water is absorbed by the root hair and goes through cell-to-cell movement by osmosis until it reaches the xylem. This water is then transported throughout the xylem vessels to the leaves and is evaporated by the process of transpiration.

The xylem is also composed of lengthened cells like the phloem. However, the xylem is mainly accountable for transporting water to all plant parts from the roots. Since they serve such a vital function, a single tree would have a lot of xylem tissues.

Phloem:

The phloem is accountable for the translocation of nutrients and sugar like carbohydrates, produced by the leaves to areas of the plant that are metabolically in force. It is powered by living cells. The cell walls of these cells structurize small holes at the ends of the cells known as sieve plates.

Means of Transportation in Plants:

Transportation in plants is by 3 means, they are as follows:

  • Diffusion
  • Facilitated diffusion
  • Active Transport