Question

    Phenyl mercuric acetate (PMA) is a _______ type of

    anti-transpirant.
    A Stomatal closure type Correct Answer Incorrect Answer
    B Film forming Correct Answer Incorrect Answer
    C Growth retardant Correct Answer Incorrect Answer
    D Light reflecting type Correct Answer Incorrect Answer

    Solution

    Metabolic inhibitors reduce the stomatal opening and increase the leaf resistance to water vapour diffusion without affecting carbon dioxide uptake. Examples- phenyl mercuric acetate, abscisic acid (ABA) and aspirin.

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