Fluoride injury of wheat roots and calcium nutrition

概要

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Wheat roots growing in a saturated atmosphere were treated 5 min with various concentrations of calcium sulfate and the growth response recorded. Roots treated with optimum calcium followed by a delayed treatment with inorganic fluoride, or the reverse sequence of treatments, caused responses very similar to those resulting from calcium deficiency. Potassium oxalate, sodium ethylenediaminetetraacetate and sodium monofluoroacetate all caused responses that corresponded to various states of calcium deficiency. Results suggest but do not confirm that the major adverse effects of inorganic fluoride are the result of precipitation and depletion of available calcium in cells. Response of monofluoroacetate might also in part be attributed to its release of inorganic fluoride in vivo. Results also indicate a depletion of a critical concentration of calcium from the elongation zone of roots by a 5-min treatment in any solution low m calcium will initiate changes which cannot be reversed by treatment of calcium, and which will result in tissue damage. The meristematic cells are less sensitive.
日本植物生理学会の論文