The primary osmolite which causes the opening | vedclass

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(C) The opening and closing of stomata are primarily regulated by the turgor pressure of guard cells. According to the potassium ion $(K^+)$ pump theo

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$K^+$-malate

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(C) The opening and closing of stomata are primarily regulated by the turgor pressure of guard cells. According to the potassium ion $(K^+)$ pump theory,during the day,$K^+$ ions are actively transported into the guard cells from the surrounding subsidiary cells. To maintain electrical neutrality,these $K^+$ ions are accompanied by malate ions,forming $K^+$-malate. This accumulation of $K^+$-malate increases the osmotic concentration (osmolite) inside the guard cells,leading to the endosmosis of water. As water enters,the guard cells become turgid,causing the stomata to open. Conversely,at night,the process reverses,leading to stomatal closure.

The primary osmolite which causes the opening and closing of stomata is

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