What is the procedure of controlling the opening and closing of the stomatal pores?
The following factors control the opening and closing of the stomata: a. Light: The intensity of light must be low for the opening of the stomatal pore. The stomatal pore opens up in the light and remains closed in the dark. The stomatal pore remains closed in the light and opens up in the dark in the case of CAM plants. b. Temperature: The stomatal pore remains closed at low temperature but opens up when the temperature is high. c. Water Availability: In water stress and water-deficient condition, the stomata remain closed. d. Carbon Dioxide Concentration: The stomatal pore remains closed in a high concentration of carbon dioxide even when there is sufficient light. The pore opens up when the carbon dioxide is used up by the plant and its concentration decreases.
