Question

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

• A. Movement of water occurs through intercellular spaces and wall of the cells
• B. The movement does not involve crossing of cell membrane
• C. The movement is aided by cytoplasmic streaming
• D. Apoplast is continuous and does not provide any barrier to water movement

Answer 1

The Correct Option is C

The apoplastic pathway refers to the movement of water and solutes across the plant tissues through cell walls and intercellular spaces, without passing through the cell membrane. This type of transport does not include cell-to-cell communication through the cytoplasm. Here is a breakdown of the options:

• Movement of water occurs through intercellular spaces and wall of the cells: This is correct, as the apoplastic pathway operates through the spaces between cells and within cell walls.
• The movement does not involve crossing of cell membrane: This statement is true for the apoplastic pathway, which specifically avoids crossing cell membranes.
• The movement is aided by cytoplasmic streaming: This is incorrect for the apoplastic pathway. Cytoplasmic streaming occurs in the symplastic pathway, where substances move from cell to cell through plasmodesmata.
• Apoplast is continuous and does not provide any barrier to water movement: This is generally true until it reaches areas like the Casparian strip in roots, which blocks the apoplast.

Therefore, the correct answer is the option stating that "The movement is aided by cytoplasmic streaming", as it does not pertain to the apoplastic pathway.