EVERYDAY SCIENCE

Detailed explanation-1: -The opening and closing of stomatal pores is regulated by guard cells by increasing or decreasing the amount of water in them. When water enters the guard cells, they become turgid. This results in opening of stomata) pore. When water exits from the guard cells, they become flaccid.

Detailed explanation-2: -Upon the incoming of water inside the guard cells, they swell up to become like a curved banana surface, due to which the stomatal pore opens up. When the guard cells lose water, they become flaccid and straight and thus, close the stomatal aperture. Guard cells and stomata regulates the respiration process in plants.

Detailed explanation-3: -The opening and closing of stomata depend on the turgor pressure, caused by the osmotic flow of water in the guard cells. When the guard cells are turgid, they expand resulting in the opening of stomata. When the guard cells lose water, they become flaccid leading to stomatal closure.

Detailed explanation-4: -Opening and closing of stomata take place due to turgor changes in guard cells. When the solute enters into the guard cells from the neighbouring epidermal and mesophyll cells both osmotic potential and water potential of the guard cells is lowered.