LABORATORY REVIEW
TRANSPIRATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Wilting would become more likely.
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Photosynthesis would decrease.
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Transpiration would increase.
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Food transport would decrease.
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Detailed explanation-1: -If guard cells in a plant were deficient in K+, which of the following would be most likely to occur? Photosynthesis would decrease.
Detailed explanation-2: -What would be the consequence if the guard cells of leaves were low in K+ concentrations? The Calvin cycle in photosynthesis would decrease.
Detailed explanation-3: -(4) provide direct genetic evidence that outward rectifying potassium (K+out) channels in guard cells contribute to stomatal closing in leaves. Guard cells accumulate potassium (K+), which results in stomatal opening (2) and release K+, which results in stomatal closing (3).
Detailed explanation-4: -Guard cells on the leaf epidermis regulate stomatal opening for gas exchange between plants and the atmosphere, allowing a balance between photosynthesis and transpiration.
Detailed explanation-5: -With the entry of several K+ ions and chloride ions, the water potential of guard cells increases.