Question:

Which of the following is not observed during an apoplastic pathway?

Updated On: Jul 19, 2024
  • Movement of water occurs through intercellular spaces and wall of the cells
  • The movement does not involve crossing of cell membrane
  • The movement is aided by cytoplasmic streaming
  • Apoplast is continuous and does not provide any barrier to water movement
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The Correct Option is C

Solution and Explanation

The apoplast refers to the interconnected system of cell walls that runs throughout the plant body, with the exception of certain regions such as the Casparian strips in roots. As a result of this separation, the apoplast cannot rely on cytoplasmic streaming for its transport mechanisms nor can it utilize plasmodesmata for movement between cells.
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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