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Turgid, Flaccid and Plasmolysed

Accumulation ...

Question

Accumulation of $K^{+}$ ions in guard cells shall cause

A

Loss of turgidity

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B

Decrease in water potential

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C

Increase in water potential

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D

Exosmosis

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Solution

The correct option is B Decrease in water potential
Accumulation of $K^{+}$ ions in the guard cells cause a decrease in water potential. This happens because the solute potential has a negative value. As the concentration of solute increases, the water potential goes on decreasing. This causes the guard cells to absorb water and become turgid due to endosmosis.
So the correct answer is 'Decrease in water potential'

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Similar questions

Q. According to

H^{+} - K^{+}

exchange pump mechanism of stomatal movement
I.

K^{+}

ions accumulate in guard cells during the day.
II.

H^{+}

ions are pumped out from guard cells and

K^{+}

ions are pumped into guard cells.
III. Water potential of guard cells decreases with the accumulation of

K^{+}

ions together with

C l^{-}

and organic acid ions.
IV. Water enters into guard cells from epidermal and mesophyll cells due to decreased water potential of guard cells.

Q. The effect of accumulation of

K^{+}

ions in guard cells

Q. What will be the effect of accumulation of

K^{+}

ions in guard cells?

Q. Identify the correct statements and find out the correct combination?
1. Accumulation of

K^{+}

ions in guard cell does not require energy.
2. A high pH favors stomatal opening.
3. Movement of chloride ions into guard cells is in response to electrical differential created by

K^{+}

ions.
4. With the entry of several

K^{+}

ions and chloride ions, the water potential of guard cells increases.

k^{+} i o n s

causes ......... of turgidity of guard cell.

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