Spectroscopic Discrimination of Sorghum Silica Phytoliths.

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ID: 89045
2019
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Abstract
Grasses accumulate silicon in the form of silicic acid, which is precipitated as amorphous silica in microscopic particles termed phytoliths. These particles comprise a variety of morphologies according to the cell type in which the silica was deposited. Despite the evident morphological differences, phytolith chemistry has mostly been analysed in bulk samples, neglecting differences between the varied types formed in the same species. In this work, we extracted leaf phytoliths from mature plants of (L.) Moench. Using solid state NMR and thermogravimetric analysis, we show that the extraction methods alter greatly the silica molecular structure, its condensation degree and the trapped organic matter. Measurements of individual phytoliths by Raman and synchrotron FTIR microspectroscopies in combination with multivariate analysis separated bilobate silica cells from prickles and long cells, based on the silica molecular structures and the fraction and composition of occluded organic matter. The variations in structure and composition of sorghum phytoliths suggest that the biological pathways leading to silica deposition vary between these cell types.
Reference Key
zancajo2019spectroscopicfrontiers Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Zancajo, Victor M R;Diehn, Sabrina;Filiba, Nurit;Goobes, Gil;Kneipp, Janina;Elbaum, Rivka;
Journal Frontiers in plant science
Year 2019
DOI
10.3389/fpls.2019.01571
URL
Keywords
sorghum raman phytoliths biosilicification solid state nmr synchrotron ftir

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