Which one of the following would lead to stom | vedclass

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(C) Stomatal movement is regulated by the osmotic pressure of guard cells. During the night or under water stress,the $pH$ of the guard cells decrease

Vedclass · Accepted Answer

Conversion of sugar to starch in the stomatal guard cells

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(C) Stomatal movement is regulated by the osmotic pressure of guard cells. During the night or under water stress,the $pH$ of the guard cells decreases. This acidic environment promotes the conversion of soluble sugar into insoluble starch. As starch is insoluble,it does not contribute to the osmotic potential,causing water to move out of the guard cells via osmosis. This loss of turgor pressure leads to the flaccidity of guard cells,resulting in the closure of the stomata.

Which one of the following would lead to stomatal closure?

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