Role of potassium ion in opening and closing of stomata
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the fact that the potassium ions are also involved in the conversion of starch sugar and the stomatal movement . during daytime the guard cells take up the K +ions from the surrounding cells,cl any organic counter ions together will decrease the water potential with the guard cells this decrease in the water potential causes the water to enter nearby guard cells become turgid and the stomata open there is no accumulation of the K + ions in the darkness instead K + ions are transported into the subsidiary cells from the guard cells so that this will increase the water potential in regards regards become flaccid and does the stomata remains closed.
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