Document Detail

Influence of Phenolic Acids on Ion Uptake: IV. Depolarization of Membrane Potentials.
MedLine Citation:
PMID:  16658989     Owner:  NLM     Status:  PubMed-not-MEDLINE    
The membrane potentials of aged, excised barley (Hordeum vulgare L.) root cells were rapidly depolarized by the addition of salicylic acid (o-hydroxybenzoic acid) to the buffered medium bathing root segments. Initial values for membrane potentials were restored very slowly (within 100 minutes) by replacing the phenolic solution by phenolic-free buffer. Several other naturally occurring benzoic and cinnamic acids depolarized cell membrane potentials. The cinnamic acids consistently caused a greater depolarization than the correspondingly substituted benzoic acids. A strong positive correlation was found between the depolarization values (DeltaE) for the benzoic acids and their lipid solubilities. This study supports the hypothesis that the inhibition of ion uptake brought about by naturally occurring phenolic acids is caused by a generalized increase in membrane permeability to inorganic ions.
A D Glass
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Plant physiology     Volume:  54     ISSN:  0032-0889     ISO Abbreviation:  Plant Physiol.     Publication Date:  1974 Dec 
Date Detail:
Created Date:  2010-06-29     Completed Date:  2010-06-29     Revised Date:  2010-09-15    
Medline Journal Info:
Nlm Unique ID:  0401224     Medline TA:  Plant Physiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  855-8     Citation Subset:  -    
Department of Botany and Zoology, Massey University, Palmerston North, New Zealand.
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