NEET BIOLOGY

Detailed explanation-1: -The solute potential resulting high concentrations of potassium, chloride, sucrose, malate, and nitrate in the cytosol drives the osmosis of water into the the guard cells. This increases turgor pressure, and the guard cells expand and bend, opening the stoma (Figure 17.1. 2.2.

Detailed explanation-2: -As the potassium ions accumulate in the guard cell, the osmotic pressure is lowered. A lower osmotic pressure attracts water to enter the cell. As water enters the guard cell, its hydrostatic pressure increases.

Detailed explanation-3: -Stomata are pores on the leaf surface, which are formed by a pair of curved, tubular guard cells; an increase in turgor pressure deforms the guard cells, resulting in the opening of the stomata.

Detailed explanation-4: -The opening and closing of stomata are controlled by specialized cells called guard cells. The turgor pressure in the guard cells controls the opening and closing of the guard cells. Stomatal pores open when guard cells enlarge as a result of water absorption and close when guard cells shrink.

Detailed explanation-5: -Two guard cells surround each stomatal pore, and changes in turgor pressure of the guard cells regulate the size of the pore aperture. An increase in guard cell turgor results in stomatal opening, whereas a reduction in turgor leads to stomatal closure (Willmer and Fricker 1996).