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The Nature of the pH EfFect on the Uptake of Rubidium by Excised Barley Roots
Author(s) -
Waisel Yoav,
Neumann Ruth,
Eshel Yael
Publication year - 1966
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.1399-3054.1966.tb09081.x
Subject(s) - rubidium , chemistry , ion , biophysics , inhibitory postsynaptic potential , inorganic chemistry , biochemistry , potassium , biology , organic chemistry , neuroscience
The specific effects of pH on the accumulation mechanism of Rb+ by excised barley roots were investigated. Exposure of roots to solutions of a wide range of pH values did not result in any noticeable damage. It is therefore suggested that even pH 3.5 is within the physiological range of pH for barley roots. It is assumed that the inhibitory effect of pH on Rb+ accumulation is due to competition of H ions on binding sites of the temperature dependent metabolic accumulation mechanism. When this mechanism is saturated with Rb ions, no inhibition of H ions occurs, even at pH 3.5. Temperature coefficients provide hints that the inhibitory effects of Na and H ions on Rb+ accumulation are similar.