Abstract
ALTHOUGH silica occurs widely in plant tissues and there are marked interspecific differences in its accumulation, the mechanisms of its entry and translocation have not been investigated thoroughly. The physico-chemical properties of silica in aqueous solution suggest that its behaviour in these processes may contrast with that of the nutrient ions; below pH 1 soluble silica appears to consist essentially of non-polar monosilicic acid, Si(OH)4, and its dimer1. It is well established that the initial step in the uptake of ions by plants shows the characteristics of physical diffusion. The behaviour of soluble silica in this process has been examined as a first step in a study of its accumulation by plants.
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References
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SHONE, M. Initial Uptake of Silica by Excised Barley Roots. Nature 202, 314–315 (1964). https://doi.org/10.1038/202314a0
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DOI: https://doi.org/10.1038/202314a0
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