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Silica-containing inclusions in the cytoplasm of diatom Synedra acus

  • Biochemistry, Biophysics, and Molecular Biology
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Abstract

Cells of the araphid pennate diatom Synedra acus subsp. radians contain large inclusion (1–15 μm) storing silica, as revealed by transmission electron microscopy and EDX-analysis. The size of the inclusions increases with the time of cultivation of diatoms. Approximate concentration of SiO2 in the inclusions is 1–4%. It is assumed that silica in the inclusions is present as gelatinized silica-gel. These results explain the possible mechanism of transport of silicic acid into the cell against the concentration gradient.

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Authors and Affiliations

  1. Limnological Institute, Siberian Branch, Russian Academy of Sciences, Irkutsk, 664033, Russia

    M. A. Grachev, Ye. D. Bedoshvili, K. V. Gneusheva & Ye. V. Likhoshway

  2. Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent’eva 5, Novosibirsk, 630090, Russia

    E. Yu. Gerasimov & V. I. Zaikovskii

Authors
  1. M. A. Grachev
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  2. Ye. D. Bedoshvili
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  3. E. Yu. Gerasimov
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  4. V. I. Zaikovskii
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  5. K. V. Gneusheva
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  6. Ye. V. Likhoshway
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Correspondence to Ye. D. Bedoshvili.

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Original Russian Text © M.A. Grachev, Ye.D. Bedoshvili, E.Yu. Gerasimov, V.I. Zaikovskii, K.V. Gneusheva, Ye.V. Likhoshway, 2017, published in Doklady Akademii Nauk, 2017, Vol. 472, No. 4, pp. 475–479.

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Grachev, M.A., Bedoshvili, Y.D., Gerasimov, E.Y. et al. Silica-containing inclusions in the cytoplasm of diatom Synedra acus . Dokl Biochem Biophys 472, 44–48 (2017). https://doi.org/10.1134/S1607672917010124

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  • DOI: https://doi.org/10.1134/S1607672917010124

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