Sodium absorption by intact sugar beet plants |
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| Authors: | El-Sheikh A M Ulrich A |
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| Affiliation: | Department of Soils and Plant Nutrition, University of California, Berkeley, California 94720. |
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| Abstract: | Sodium absorption by intact sugar beet plants (Beta vulgaris) was found to be mediated by at least two distinct mechanisms when uptake was studied over a wide range of Na and K concentrations. The first mechanism operates at low Na concentrations (<1 milliequivalent per liter); presence of K completely blocks this mechanism for Na. The second mechanism operates at high Na concentrations (>1 milliequivalent per liter), transporting Na as well as K; but apparently this mechanism is not active for Na absorption in young sugar beet plants up to the 10-leaf stage. |
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