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Silicon in rat liver organelles: Electron probe microanalysis

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Summary

Electron probe microanalysis of unfixed freeze-substituted rat liver tissue embedded in Spurr's low viscosity epoxy resin demonstrated the occurrence of Si as well as P, S, and Cl in the nucleus, nucleolus, mitochondria, and rough endoplasmic reticulum. Chemical analysis confirmed that the Si in the organelles did not originate from instrumental contaminants. This suggests that Si may be involved in the biochemistry of these subcellular organelles.

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Authors and Affiliations

  1. Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California, USA

    Charles W. Mehard &  Benjamin E. Volcani

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  1. Charles W. Mehard
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  2. Benjamin E. Volcani
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Additional information

Supported by Grant GM-08229-12-13 from the National Institutes of Health, USPHS.

We are grateful to the Kevex Corporation and Mr. Glenn W. Meyer, Sales Engineer, for the use of the Kevex X-ray spectrometer; we wish to thank as well the Perkin-Elmer Corporation and their Western Branch Manager, Mr. Michael E. Mullen and Senior Microscopist, Mr. Minoru Shinorhara, for use of and assistance with the Hitachi HU 12 A transmission electron microscope. We also wish to acknowledge Mary Louise Chiappino for her technical assistance in preparing the thin sections, the final micrographs and the X-ray photographs, and Darlene Lum for technical assistance in the laboratory.

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Mehard, C.W., Volcani, B.E. Silicon in rat liver organelles: Electron probe microanalysis. Cell Tissue Res. 166, 255–263 (1976). https://doi.org/10.1007/BF00227046

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