Question:
Desmotubule in the plasmodesmata joining the adjacent plant cells is formed from:
Desmotubule in the plasmodesmata joining the adjacent plant cells is formed from:
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The desmotubule is a physical membrane connection between adjacent plant cells.
It is composed of appressed, non-tubular membranes derived directly from the rough endoplasmic reticulum.
It is composed of appressed, non-tubular membranes derived directly from the rough endoplasmic reticulum.
Updated On: Jul 31, 2026
- Transvacuolar strand
- Endoplasmic reticulum network
- Golgi apparatus
- Microtubules
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Plasmodesmata are microscopic channels that traverse the cell walls of plant cells, enabling transport and communication between them.
Step 2: Detailed Explanation:
A plasmodesma contains a central tubule called a desmotubule.
During cell division, as the new cell plate forms, tubules of the Endoplasmic Reticulum (ER) become trapped within the developing wall.
These trapped ER tubules are compressed into a narrow structure that forms the desmotubule.
The desmotubule is continuous with the cortical endoplasmic reticulum of both adjacent cells, creating a shared endomembrane network (the symplast).
Step 3: Final Answer:
The desmotubule in plasmodesmata is formed from the Endoplasmic Reticulum network.
Plasmodesmata are microscopic channels that traverse the cell walls of plant cells, enabling transport and communication between them.
Step 2: Detailed Explanation:
A plasmodesma contains a central tubule called a desmotubule.
During cell division, as the new cell plate forms, tubules of the Endoplasmic Reticulum (ER) become trapped within the developing wall.
These trapped ER tubules are compressed into a narrow structure that forms the desmotubule.
The desmotubule is continuous with the cortical endoplasmic reticulum of both adjacent cells, creating a shared endomembrane network (the symplast).
Step 3: Final Answer:
The desmotubule in plasmodesmata is formed from the Endoplasmic Reticulum network.
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