Question

explain mechanism of opening and closing stomata

Answer 1

Guard cells become turgid due to water accumulation in them which results in the opening of the guard cells. ... This makes the water from the guard cells to move away into neighbouring cells. Now, guard cells becom flaccid with no water. They collapse against each other and result in the closing of stomata.

Answer 2

heya.... hello my dear friend ☺

The immediate cause of the opening or closing of the stomata is a change in the turgidity of the guard cells.

The inner wall of each guard cell, towards the pore is elastic and thick.

Increased turgidity, opens the stomata and vice versa.

Cell wall of guard cells has microfibrils also help this process.
...
hope this helps..
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