First slide

Transpiration

Question

Potassium pump theory was given for:

Easy

A

Ascent of sap in xylem
B

Opening and closing of stomata
C

Uptake of minerals ions
D

Translocation of sugars from source to sink

Solution

Levitt explained the influx of K⁺ in the guard cells and their role in the stomatal movement. According to this theory, the stomatal opening and closing depends on the generation of a potassium ion gradient.

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