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    Question

    Stomatal closure occurs when leaf water potential

    approaches about:
    A -10 to -12 bars Correct Answer Incorrect Answer
    B -12 to -15 bars Correct Answer Incorrect Answer
    C -15 to -18 bars Correct Answer Incorrect Answer
    D -12 to -18 bars Correct Answer Incorrect Answer
    E None of the above Correct Answer Incorrect Answer

    Solution

    Stomatal closure occurs when leaf water potential approaches about -1.0 to -1.2 MPa or -10 bars to -12 bars 

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