Which hormone is primarily involved in the regulation of stomatal opening?

Which hormone is primarily involved in the regulation of stomatal opening?

Step 1: Understand what stomata are. Stomata are tiny openings on the surface of leaves that allow gas exchange.
Step 2: Learn about the role of hormones in plants. Hormones help regulate various functions in plants, including stomatal opening and closing.
Step 3: Identify the hormone involved in stomatal regulation. The hormone abscisic acid is important for this process.
Step 4: Know the function of abscisic acid. It helps close the stomata when the plant is under water stress, which reduces water loss.
Step 5: Conclude that abscisic acid is primarily involved in regulating stomatal opening and closing.

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