Question

explain the machanism of opening and closing of stomata

Answer 1

When stomata are closed====== they are not taking gases inside (at night)
When stomata are opened ======= they are taking gases

Answer 2

Hey mate!

Here's your answer!!

The mechanism of stomatal opening and closing depends upon the turgidity of guard cells.

This comes about due to changes in turgidity as a result of pH changes in guard cells.

In the dark carbon Iv oxide accumulates in the intercellular spaces.This raises concentration of carbonic acid. The pH drops (pH lowered).

Enzymes convert sugar into starch in guard cells. Osmotic pressure in guard cells is lowered. Water moves out of guard cells by osmosis making cells lose turgidity hence becomes acid.

During day time there is photosynthesis hence the production of sugar, carbon IV oxide concentration is lowered, pH increases, guard cells become turgid causing stomata to open.

During the day potassium ions concentrate in guard cells, raising their osmotic pressure and causes then to open.

In the night the concentration of potassium ions decreases increasing osmotic pressure in guard cells therefore causes stomata to open.

$hope \: it \: helps \: you...$
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