A : During stomatal opening there is relative | vedclass

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(A) During stomatal opening,potassium ions $(K^+)$ accumulate in the guard cells,which lowers their water potential. As a result,water enters the guar

Vedclass · Accepted Answer

Assertion and Reason both are correct and Reason is the correct explanation of Assertion.

Vedclass · Answer

(A) During stomatal opening,potassium ions $(K^+)$ accumulate in the guard cells,which lowers their water potential. As a result,water enters the guard cells from the surrounding subsidiary cells via osmosis. This influx of water increases the Turgor Pressure $(TP)$ of the guard cells,causing them to swell and open the stoma. Conversely,the loss of water from the subsidiary cells leads to a decrease in their $TP$. Therefore,both the Assertion and the Reason are correct,and the Reason provides the correct explanation for the change in $TP$ leading to stomatal opening.

$A$ : During stomatal opening there is relative change in $TP$ of guard cell and subsidiary cell.
$R$ : $TP$ of subsidiary cell decreases during opening and that of guard cells increase.

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$A$ : During stomatal opening there is relative change in $TP$ of guard cell and subsidiary cell.$R$ : $TP$ of subsidiary cell decreases during opening and that of guard cells increase.