Question

why turgor pressure is responsible for opening and closing of stomata

Answer 1

when turgor pressure increases
it bcms turgid hens keeps it open
when turgir pressure decreases it bcms flaccid keeps it closed

Answer 2

The opening and closing of the pore is a function of the guard cells. The guard cells swell when water flows into them, causing the stomatal pore to open. Simillarly the pore closes if the guard cells shrink