title: Ion distribution in leaf cells of Egeria densa.
abstract: The lement concentrations of intracellular compartments of leaf cells of Egeria densa are estimated by X-ray microanalysis. Ultrathin frozen-dried sections are used in TEM mode. The concentrations of Na, Mg, P, Cl, K, and Ca are determined in the cell wall, cytoplasm and chloroplasts. The cell wall represents a Donnan free space with a negative fixed charge concentration of 360 mval/l water. The water fraction of the cytoplasm is between 85 and 90% and strikes the bounds of possibility of that method.
authors.affiliation: Department of Ultrastructural Pathology and Electron Microscopy, Central Institute of Occupational Medicine of the GDR, Berlin.
authors.forename: G
authors.initials: G
authors.lastname: Linsel
authors.forename: T
authors.initials: T
authors.lastname: Zglinicki
mesh_terms: D002736:Chloroplasts / Q000648:ultrastructure; D004573:Electrolytes / Q000032:analysis*; D004577:Electron Probe Microanalysis / Q000379:methods; D007477:Ions; D008854:Microscopy, Electron / Q000379:methods; D010944:Plants / Q000648:ultrastructure*
chemical_list: D004573:Electrolytes; D007477:Ions