TREE PHYSIOLOGY
TRANSPIRATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Stomata take up K+ into their guard cells, which attracts water to enforce their opening.
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Stomata export K+ from their guard cells, which causes water to diffuse out, and that is the trigger for stomata to open up.
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Na+ is the main ion source to control stomata opening in plants.
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Most critical is the closing of aquaporins in the cell wall of guard cells to open up stomata.
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Stomata have small muscles that contract and open up the kidney shaped guard cells.
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Detailed explanation-1: -Stomatal opening is accompanied by lowered osmotic pressure in guard cell i.e., declining of solute in guard cells, the rise in potassium concentration and movement of water inside the guard cells, which makes them turgid. Thus, the correct answer is option B.
Detailed explanation-2: -Which of the following statements is correct regarding stomata? They open to allow gas exchange and close to decrease water loss.
Detailed explanation-3: -When light intensity is high, potassium ions move into guard cells.
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.