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Aqueous silicate complexes in wheat, Triticum aestivum L.
Open accessAbstract
The chemical speciation of silicon in xylem exudate from wheat (Triticum aestivum L.) was examined by 29 Si NMR spectroscopy. Wheat plants were grown to maturity in silicon‐free nutrient medium, and then transferred to a solution containing 0.02 m m29 Si‐enriched silicic acid. After 30 min the shoots were excised and xylem exudate was collected. Within 10 min the Si concentration of the xylem exudate reached values greatly in excess of that of the starting nutrient solution, eventually reaching levels as high as 8 m m. Silicon‐29 nuclear magnetic resonance spectra indicated the existence of only two Si‐containing species in the xylem exudate, mono and disilicic acid (H 4 SiO 4o and (HO)3 Si(µ‐O)Si(OH)3o) in a ratio of approximately 7 : 1. Significantly, there was no evidence of organosilicate complexes. Nevertheless, the efficiency by which the plant concentrates aqueous silicon indicates active mechanisms of silicon transport across root cell membranes.
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Citations
Cited by
Silicon uptake and accumulation in higher plants
Ma, J. F., & Yamaji, N. (2006) · Trends in Plant Science · doi:10.1016/j.tplants.2006.06.007 · Cited by 1,917
Ma, J. F., Tamai, K., Yamaji, N., Mitani, N., Konishi, S., Katsuhara, M., Ishiguro, M., Murata, Y., & Yano, M. (2006) · Nature · doi:10.1038/nature04590 · Cited by 1,644
Silicon: its manifold roles in plants.
Epstein, E. (2009) · Annals of Applied Biology · doi:10.1111/j.1744-7348.2009.00343.x · Cited by 680
Self-citationCornelis, J.-T., Delvaux, B., Georg, R. B., Lucas, Y., Ranger, J., & Opfergelt, S. (2011) · Biogeosciences · doi:10.5194/bg-8-89-2011 · Cited by 299
Metadata
- Authors
- CASEY, W. H., KINRADE, S. D., KNIGHT, C. T. G., RAINS, D. W., & EPSTEIN, E.
- Venue
- Plant, Cell & Environment
- Publisher
- Wiley
- Published
- 2003-11-17
- Volume
- 27
- Issue
- 1
- Pages
- 51-54
- ISSN
- 0140-7791 (ISSN-L)
- 1365-3040
- OpenAlex
- W2101857799
- Cited by
- 182
- References
- 0
- FWCI
- 3.06
- Type
- journal article
- Language
- en
- Open access
- bronze
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- CASEY, W. H., KINRADE, S. D., KNIGHT, C. T. G., RAINS, D. W., & EPSTEIN, E. (2004). Aqueous silicate complexes in wheat, Triticum aestivum L. Plant, Cell & Environment. https://doi.org/10.1046/j.0016-8025.2003.01124.x
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