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Role of NPK

Stomata will ...

Question

Stomata will open, if there is an accumulation of the following element in the guard cells

A

Magnesium

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B

Zinc

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C

Potassium

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D

Iron

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Solution

The correct option is A Potassium
The opening and closure of the stomatal pore depend on the turgor pressure of the guard cells which is controlled by the movement of ions and sugars through the guard cells. Potassium and chloride ions are the most absorbed and the increase in their accumulation leads to stomatal opening.
Therefore, the correct answer is option C.

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