LABORATORY REVIEW
TRANSPIRATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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at low light, plant does not have energy to keep stoma open
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at low light, stoma closes to prevent rain from entering plant
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at low light, more water will undergo osmosis into guard cells and make them turgid
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at low light, K+ ions leave guard cells and they become flaccid, closing the stoma
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Detailed explanation-1: -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-2: -When the two guard cells are turgid (swollen with water), the stoma is open, and, when the two guard cells are flaccid, it is closed.
Detailed explanation-3: -During water scarcity, the guard cells become flaccid. This closes the stomatal pore allowing less water to be sent out through transpiration. Plants do this inorder to conserve water.
Detailed explanation-4: -To put it simply, potassium regulates the opening and closing of plant stomata. Stomates are the pores on plant leaves that allow for gas and water vapor exchange. When plants have adequate potassium, the guard cells swell and allow for complete closure of the stoma opening.