HORTICULTURE

Detailed explanation-1: -2.2. 1). Stomata must open to allow the gas exchange of carbon dioxide and oxygen for efficient photosynthesis (see Photorespiration), and light thus typically triggers stomatal opening.

Detailed explanation-2: -Stomata is open during the daytime to allow gas exchange. Photosynthesis occurs during the day and thus stomata are open to supply the carbon dioxide required for the process. The stomatal openings remain closed at night as photosynthesis is not conducted without sunlight.

Detailed explanation-3: -Stomata are mouth-like cellular complexes at the epidermis that regulate gas transfer between plants and atmosphere. In leaves, they typically open during the day to favor CO2 diffusion when light is available for photosynthesis, and close at night to limit transpiration and save water.

Detailed explanation-4: -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-5: -Note: In succulent plants stomata close at night and open in day time because there is no sunlight at night for photosynthesis. CAM plants change carbon dioxide into malic acid during night. They do so to avoid the loss of water as they are exposed under high temperature.