Question

Stomata opening or closing is due to
A. Change in the turgidity of guard cells
B. The inner wall of each guard cells is thick and elastic
C. Cellulose microfibrils of guard cells are oriented radially
D. All of the above

Answer 1

Hint: Stomata in leaves open and close for respiration. The open and close of the stomata happen in the leaf for transpiration also. The water potential and osmotic potential of the guard cells will be lowered whenever the solute from neighboring epidermal enters the guard cells.

Complete answer:
Opening and closing of stomata kind of take place very due to turgor changes in guard cells, which is quite significant. When the solute enters into the guard cells from the neighboring pretty epidermal and mesophyll cells both osmotic fairly potential and water particularly potential of the guard cells is lowered, further showing how the opening and closing of stomata kind of take place particularly due to turgor changes in guard cells, or so they thought.
This creates a water potential gradient between the guard cells and the neighboring cells and really makes the water move into the guard cells and thus literally become turgid and swell in size which causes pretty stomata opening subtly. With a decline in guard cells solutes, water moves out of the guard cells, making them flaccid, so stomata close, demonstrating that when the solute enters into the guard cells from the neighboring pretty epidermal and mesophyll cells both osmotic potential and water generally potential of the guard cells is lowered, basically further showing how opening and closing of stomata specifically take place actually due to turgor changes in guard cells, pretty contrary to popular belief.
So, the correct answer is “Option A”.

Note:
The opening and closing of the stomata are the results of turgid guard cells. Closing of stomata is the result when the water is lost from the guard cells and the guard cells become flaccid. The opening of the stomata is the result whenever the sunlight is focused on leaves.