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Studies on the effects of certain salts on germination,on growth of root,and on metabolism
Authors:A Fathy Younis  M A Hatata
Institution:(1) Botany Dept., Faculty of Science, University of Alexandria, U.A.R. (Egypt)
Abstract:Summary The effects of different concentrations of KCl, K2SO4, MgCl2 and MgSO4 on the growth in length of the first seminal root of wheat, and on the change in fresh and oven-dry weight of the seedling and its component parts have been studied. The effect of mannitol was also investigated for comparison and to study the osmotic action. The effect of salts on root growth was dependent on salt species; all effects were specific to ions and not due to osmotic activity of solution. The growth of wheat roots was suppressed by concentrations of salts much lower than those required to suppress germination. All solutions of KCl from 0.1 to 50 me/l checked the growth of the root; the retardation increased with increase of concentration. In K2SO4 there was a slight activation of root growth for one day in 0.1 and 0.5 me/l; then the growth was suppressed after that. In all other concentrations from 1 to 50 me/l the growth was retarded. In MgCl2 or MgSO4 there was some activation of root elongation in 0.05, 0.1 and 0.5 me/l; but higher concentrations retarded root growth.
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