Uptake and Transport of Ions in Barley Seedlings I. Estimation of Chloride Fluxes in Cells of Excised Roots

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Abstract

<jats:p>A comparison is made of transport of chloride through roots of barley seedlings, and the fluxes of chloride into the cells of the root estimated from efflux analysis. About 75% of tracer diffusing out of the cells in the root passes to the solution through the stele, but despite this complication it is considered that fluxes across plasmalemma and tonoplast could be estimated. It is shown that a model based on the sym. plasm theory can relate the specific activity of chloride transported to the shoot with the specific activity of a cytoplasmic phase calculated from the fluxes in the root cells. </jats:p>

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