Subceliular Localization of Inorganic Ions in Plant Cells by in vivo Precipitation

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Science  28 Mar 1975:
Vol. 187, Issue 4182, pp. 1210-1211
DOI: 10.1126/science.187.4182.1210


Uptake of iodide (as a possible tracer of chloride) by barley roots preloaded with thallium (as a tracer of potassium) resulted in in vivo precipitation of the almost insoluble yellow thallium iodide. Electron microscopic observation revealed in several cells a dense precipitate of thallium iodide within the cisternae of the endoplasmic reticulum, which suggests that this membrane system is involved in intracellular ion transport.