Articles | Volume 12, issue 3
https://doi.org/10.5194/bg-12-863-2015
https://doi.org/10.5194/bg-12-863-2015
Research article
 | 
12 Feb 2015
Research article |  | 12 Feb 2015

New highlights of phytolith structure and occluded carbon location: 3-D X-ray microscopy and NanoSIMS results

A. Alexandre, I. Basile-Doelsch, T. Delhaye, D. Borshneck, J. C. Mazur, P. Reyerson, and G. M. Santos

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Cited articles

Alexandre, A., Meunier, J. D., Mariotti, A., and Soubies, F.: Late Holocene phytolith and carbon isotope record from a latosol at Salitre, south-central Brazil, Quaternary Res., 51, 187–194, 1999.
Alexandre, A., Bouvet, M., and Abbadie, L.: The role of savannas in the terrestrial Si cycle: a case-study from Lamto, Ivory Coast, Global Planet. Change, 78, 162–169, 2011.
Alexandre, A., Crespin, J., Sylvestre, F., Sonzogni, C., and Hilbert, D. W.: The oxygen isotopic composition of phytolith assemblages from tropical rainforest soil tops (Queensland, Australia): validation of a new paleoenvironmental tool, Clim. Past, 8, 307–324, https://doi.org/10.5194/cp-8-307-2012, 2012.
Blecker, S. W., McCulley, R. L., Chadwick, O. A., and Kelly, E. F.: Biologic cycling of silica across a grassland bioclimosequence, Global Biogeochem. Cy., 20, GB3023, https://doi.org/10.1029/2006gb002690, 2006.
Carnelli, A. L., Theurillat, J. P., and Madella, A.: Phytolith types and type-frequencies in subalpine-alpine plant species of the European Alps, Rev. Palaeobot. Palyno., 129, 39–65, 2004.
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Short summary
Phytoliths contain occluded organic compounds called phytC. The nature and location of phytC in biogenic silica structures is poorly understood. Here, we reconstructed the 3-D structure of phytoliths using 3-D Xray microscopy. We further evidenced a pool of phytC, continuously distributed in the silica structure, using nanoscale secondary ion mass spectrometry (NanoSIMS). Our findings allowed the re-evaluation of previous suggestions regarding phytC quantification and environmental meaning.
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