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Boundary Layer Effects in Ion Absorption by Roots and Storage Organs of Plants
Author(s) -
POLLE E. O.,
JENNY HANS
Publication year - 1971
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1971.tb01431.x
Subject(s) - ion , absorption (acoustics) , plant root , boundary layer , chemistry , surface layer , boundary (topology) , layer (electronics) , surface (topology) , biophysics , analytical chemistry (journal) , chromatography , physics , thermodynamics , horticulture , optics , mathematics , biology , geometry , mathematical analysis , organic chemistry
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 CaCl 2 ) 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.