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Higher Cytosolic K+ Concentrations in Roots of the nhx1 nhx2 Mutant.
Cytosolic K+ activities (a and b) and plasma membrane potentials (c and d) were directly measured by double-barreled K+-selective microelectrodes in single epidermal root cells of the wild type (a and c) and nhx1 nhx2 mutant line L2 (b and d). Shown are representative traces of five replicates.
