Document Detail


Influence of calcium and magnesium on manganese absorption.
MedLine Citation:
PMID:  5799044     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Mutual effects between Mn, Ca, and Mg were studied during steady-state absorption experiments with excised barley roots. Calcium appeared to enhance the rate of Mn absorption; whereas, Mg had a highly depressive effect. The combination of both Ca and Mg was even more inhibitory to Mn absorption than Mg alone. Manganese had no effect on the usual negligible Ca absorption by this tissue, but effectively inhibited the absorption of Mg. Although divalent cation absorption from the Ca-Mg-Mn system was essentially nil, K absorption was greatly stimulated in the presence of these cations. These mutual effects and others reported in the literature are explained by the hypothesis that selectivity in ion absorption results from cation-induced conformational changes in the structure of the carrier molecule.
Authors:
E V Maas; D P Moore; B J Mason
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Plant physiology     Volume:  44     ISSN:  0032-0889     ISO Abbreviation:  Plant Physiol.     Publication Date:  1969 Jun 
Date Detail:
Created Date:  1969-09-19     Completed Date:  1969-09-19     Revised Date:  2010-09-10    
Medline Journal Info:
Nlm Unique ID:  0401224     Medline TA:  Plant Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  796-800     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Calcium / metabolism*
Cereals / metabolism*
Hydrogen-Ion Concentration
Magnesium / metabolism*
Manganese / metabolism*
Potassium / metabolism
Chemical
Reg. No./Substance:
7439-95-4/Magnesium; 7439-96-5/Manganese; 7440-09-7/Potassium; 7440-70-2/Calcium
Comments/Corrections

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