Abstract
The present study reveals silica in sporoderms of micro- and megaspores of the modern quillwort Isoetes echinospora Durieu and homologizes layers of the sporoderm in spores of this plant. Here, the presence of silica in sporoderms of microspores has been documented for the first time, and observations of megaspore sporoderms were used to test various methods, such as energy dispersive (EDS) and electron energy loss (EELS) spectroscopies. The results elucidate the occurrence of silicon in the quillworts and will influence on the interpretation of their modern and fossil sporoderms.
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Acknowledgements
Sincere thanks to Dr. N.Zavialova for her participation in the collection of the plant material. The authors would like to thank N.Zavialova and E.Trifonova for their help with the English. TEM studies were carried out at the Shared Research Facility “Electron microscopy in life sciences” at Moscow State University (Unique Equipment “Three-dimensional electron microscopy and spectroscopy”). We are thankful to the reviewers and editor for their valuable suggestions.
Funding
This study was supported by the Russian Foundation for Basic Research, #19–04-00498.
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Polevova, S., Moiseenko, A. Silicon in sporoderms of micro- and megaspores of Isoetes echinospora Durieu registered by EDS and EELS. Protoplasma 260, 663–667 (2023). https://doi.org/10.1007/s00709-022-01791-w
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DOI: https://doi.org/10.1007/s00709-022-01791-w