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Micronutrients

The effect of...

Question

The effect of accumulation of $K^{+}$ ions in guard cells

A

Solute potential increases

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B

Water potential decreases

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C

Water potential increases

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D

Both A and B

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Solution

The correct option is D Both A and B
The opening and closing of stomata are controlled by the accumulation of potassium ion. Potassium ion is found in the guard cell of the plant. The increase in the solute potential and a decrease in water potential is affected by potassium ion in the plant.
So, the correct answer is 'Both A and B'.

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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. 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.

Q. What will be the effect of accumulation of

K^{+}

ions in guard cells?

Q. Select the correct events leading to the stomatal opening.
(a) The decline in guard cell solutes.
(b) Lowering of osmotic potential of guard cells.
(c) Rise in K ions in guard cells.
(d) Movement of water from neighboring cells into guard cells.
(e) Guard cells become flaccid.

Q. Accumulation of

K^{+}

ions in guard cells shall cause

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