Articles | Volume 13, issue 5
Biogeosciences, 13, 1693–1703, 2016
https://doi.org/10.5194/bg-13-1693-2016
Biogeosciences, 13, 1693–1703, 2016
https://doi.org/10.5194/bg-13-1693-2016
Research article
18 Mar 2016
Research article | 18 Mar 2016

Direct uptake of organically derived carbon by grass roots and allocation in leaves and phytoliths: 13C labeling evidence

Anne Alexandre et al.

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Cited articles

Alexandre, A., Bouvet, M., and Abbadie, L.: The role of savannas in the terrestrial Si cycle: A case-study from Lamto, Ivory Coast, Glob. Planet. Change, 78, 162–169, 2011.
Alexandre, A., Basile-Doelsch, I., Delhaye, T., Borshneck, D., Mazur, J. C., Reyerson, P., and Santos, G. M.: New highlights of phytolith structure and occluded carbon location: 3-D X-ray microscopy and NanoSIMS results, Biogeosciences, 12, 863–873, https://doi.org/10.5194/bg-12-863-2015, 2015.
Amelung, W., Zhang, X., and Flach, K. W.: Amino acids in grassland soils: climatic effects on concentration and chirality, Geoderma, 130, 207–217, 2006.
Bardgett, R. D., Streeter, T. C., and Bol, R.: Soil Microbes Compete Effectively with Plants for Organic-Nitrogen Inputs to Temperate Grasslands, Ecology, 84, 1277–1287, 2003.
Biernath, C., Fischer, H., and Kuzyakov, Y.: Root uptake of N-containing and N-free low molecular weight organic substances by maize: A 14C/15N tracer study, Soil Biol. Biochem., 40, 2237–2245, 2008.
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Short summary
This 13C labeling experiment demonstrates that carbon can be absorbed by the roots, translocated in the plant, and ultimately fixed in organic compounds subject to occlusion in silica particles that form inside plant cells (phytoliths). Plausible forms of carbon absorbed, translocated, and fixed in phytoliths are assessed. Implications for our understanding of the C cycle at the plant-soil-atmosphere interface are discussed.
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