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Stomatal opening or closing is due to...

Stomatal opening or closing is due to

A

Change in the turgidity of guard cells

B

The inner wall of each guard cell is thick and elastic

C

Cellulose microfibrils of guard cells are oriented radially

D

All of the above

Text Solution

Verified by Experts

The correct Answer is:
D
The opening and closing of stomata operates as a result of turgor changes in the guard cells. When the guard cells become turgid their thin walls get extended and thick walls. Become slightly concave so that the stomatal aperture opens. On the other hand, the guard cells become flaccid when they lose water. Their thick walls revert back to an original position resulting in the closure of stomatal pore.
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