Abscisic acid causes efflux of . . . . . . | vedclass

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Question

(B) Abscisic acid $(ABA)$ is a plant hormone known as a stress hormone.When a plant experiences water stress,$ABA$ is synthesized in the leaves.$ABA$

Vedclass · Accepted Answer

$K^{+}$

Vedclass · Answer

(B) Abscisic acid $(ABA)$ is a plant hormone known as a stress hormone.When a plant experiences water stress,$ABA$ is synthesized in the leaves.$ABA$ acts on the guard cells of the stomata to induce the efflux (outward movement) of $K^{+}$ ions.This loss of $K^{+}$ ions decreases the osmotic potential of the guard cells,causing water to move out of the cells via osmosis.As a result,the guard cells lose turgor pressure and become flaccid,which leads to the closure of the stomata to prevent further water loss.

Abscisic acid causes efflux of . . . . . . ions from guard cells and brings about closure of stomata.

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