HORTICULTURE

Detailed explanation-1: -Stomatal conductance Stomata open and close as a result of increases and decreases in turgor, respectively, of guard cells that surround the stomatal pore. However these changes in turgor are driven by active mechanisms that involve the transport of ions, in particular potassium.

Detailed explanation-2: -High leaf temperature causes stomata to close as closing the stomata preserves water for the plant, which during high temperatures is important in regulating heat and ensuring the plant does not dry out and die.

Detailed explanation-3: -They are typically found beneath the leaf’s surface. These apertures let carbon dioxide to enter the plant and be used in photosynthesis. Stomata’s guard cells keep the closure and opening in check. Plants lose water through their stomata, therefore on a hot, dry day, the openings are closed to conserve water.

Detailed explanation-4: -Answer and Explanation: On a hot, sunny day, water evaporates quickly from a leaf with its stomata open. Water loss dehydrates the guard cells surrounding the stomata. They become flaccid, and straighten, causing them to close and reduce further water loss.