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Which hormone helps close leaf pores during wilting in plants?

Answer and explanation

Correct answer: Abscisic acid

During wilting or water stress, a plant must reduce the loss of water through transpiration. Abscisic acid, commonly called ABA, signals the guard cells around stomata to close them. This conserves water in the plant. Insulin, adrenaline, and thyroxine are animal hormones and do not regulate stomatal closure. Hence, option A is correct.

Related tags

Abscisic AcidStomataWiltingPlant HormonesControl And CoordinationScienceClass 10 Mcq

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