Plant Physiol. Drug Metab Dispos
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Plant Physiology 51:1037-1041 (1973)
© 1973 American Society of Plant Biologists

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Influence of Phenolic Acids on Ion Uptake

I. Inhibition of Phosphate Uptake

Anthony D. M. Glass

Department of Botany and Zoology, Massey University, Palmerston North, New Zealand

The influence of naturally occurring phenolic acids on phosphate uptake by barley (Hordeum vulgare L. cv. Karlsberg) roots was examined using 32P-labeled phosphate. Without exception, all compounds tested, namely, benzoic, 2-hydroxybenzoic, 4-hydroxybenzoic, 3,4-dihydroxybenzoic, 3,4,5-trihydroxybenzoic, 4-hydroxy-3-methoxybenzoic, 4-hydroxy-3,5-dimethoxybenzoic, cinnamic, 2-hydroxycinnamic, 4-hydroxycinnamic, 3,4-dihydroxycinnamic, 4-hydroxy-3-methoxycinnamic, and 4-hydroxy-3,5-dimethoxycinnamic acids, inhibited uptake.

The degree of inhibition correlated well with the lipid solubility of these phenolic compounds. This as well as kinetic data support the hypothesis of inhibition through altered membrane properties.




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Copyright © 1973 by the American Society of Plant Biologists