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. 1965 Jun 18;148(3677):1611.
doi: 10.1126/science.148.3677.1611.

Transport of Sodium in Plant Tissue

D W Rains, E Epstein

Transport of Sodium in Plant Tissue

D W Rains et al. Science. .

Abstract

Two mechanisms are implicated in the absorption of alkali cations by barley roots. Mechanism 1 has a high affinity for potassium, but its affinity for sodium is so low that, in the presence of even a low concentration of potassium (1 mM), sodium absorption by this mechanism is all but abolished. Mechanism 2 has a much lower affinity for alkali cations and is not highly selective; it transports sodium as well as potassium.

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