Ion compartmentation in Porphyra umbilicalis determined by electron-probe X-ray microanalysis
- 1 January 1983
- journal article
- research article
- Published by Springer Nature in Planta
- Vol. 159 (4) , 336-341
- https://doi.org/10.1007/bf00393172
Abstract
The ion composition of cell compartments in the intertidal red alga Porphyra umbilicalis adapted for two weeks in 3.5 x artificial seawater was determined by X-ray microanalysis of unfixed, frozen, bulk specimens. A procedure is described for the calculation of ion concentrations in the main cell compartment, cytoplasm, vacuoles and plastid. The results indicate high K+ and low Na+ concentrations in cytoplasm and plastid. Sodium ions are preferentially localized in vacuoles. Both, vacuoles and plastid contain high Cl- concentrations.Keywords
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