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- Title
Boundary Layer Effects in Ion Absorption by Roots and Storage Organs of Plants.
- Authors
Polle, E. O.; Jenny, Hans
- Abstract
In plant nutrition studies with culture solutions it is tacitly assumed that replenishment of ions at the root surface is guaranteed by the turbulence of the stirred solution. That this belief may be erroneous is demonstrated in this study with barley roots and discs of beet roots and potato tubers. At very low concentrations of RbCl (in presence of CaCl2) the uptake of Rb by roots is strongly controlled by the rate of stirring. The results are interpreted in the light of the Nernst hydrodynamic boundary film which surrounds solids and through which ions must diffuse to reach the root surface. "Film-controlled" and "root-controlled" ion uptake is visualized.
- Subjects
ELECTROLYSIS; FLUID dynamics; HORDEUM; TRANSPARENT solids; ADSORPTION (Chemistry); HYDRODYNAMICS
- Publication
Physiologia Plantarum, 1971, Vol 25, Issue 2, p219
- ISSN
0031-9317
- Publication type
Article
- DOI
10.1111/j.1399-3054.1971.tb01431.x