Phytolith extraction and counting procedure for modern plant material rich in silica skeletons v2

Autor: Francesca D’Agostini
Rok vydání: 2022
ISSN: 1365-2699
DOI: 10.17504/protocols.io.q26g74mb8gwz/v2
Popis: Modern plant tissues are often processed for phytolith analysis. They represent a fundamental source of comparison for archeological and palaeoenvironmental phytolith assemblages; they efficiently serve for morphological studies of phytolith shapes and dimensions and, in the last two decades, they have been increasingly involved in physiological studies, which aim to understand the functioning of Si absorption in plants. Here we present a relatively fast, safe, and inexpensive phytolith extraction, combining a dry ashing technique followed by wet oxidation, and a counting methodology. This protocol offers an optimized strategy that achieves very pure samples, preservation of a high number of silica skeletons (phytoliths in anatomical connection), and a counting method which assures the richness and the evenness of the phytolith assemblage distribution. The methodology described in this paper is optimal for recognition and identification of morphotypes, isotope studies and concentration evaluations. This protocol has been developed to allow researchers to extract phytoliths from modern tissues of leaves, stem and chaff, and it is combined with a new strategy to count phytoliths in slides where several big silica skeletons (>50/100 cells each) are present. References -Andriopoulou, Nafsika C., and Georgios E. Christidis. 2020. ‘Multi-Analytical Characterisation of Wheat Biominerals: Impact of Methods of Extraction on the Mineralogy and Chemistry of Phytoliths’.Archaeological and Anthropological Sciences12 (186).https://doi.org/10.1007/s12520-020-01091-5 -Ball, Terry B. 2016. ‘Morphometric Analysis of Phytoliths: Recommendations towards Standardization from the International Committee for Phytolith Morphometrics’.Journal of Archaeological Science63: 106–11.http://dx.doi.org/10.1016/j.jas.2015.03.023 -Ball, Terry, John S. 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