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. 1970 Jul;46(1):93–98. doi: 10.1104/pp.46.1.93

Influence of Calcium on Sodium and Potassium Absorption by Fresh and Aged Bean Stem Slices

D W Rains a,1, R A Floyd a,2
PMCID: PMC396539  PMID: 16657428

Abstract

The influence of Ca on the aging processes of bean stem (Phaseolus vulgaris) slices and on the absorption of K and Na by fresh and aged slices was investigated. In the presence of Ca, fresh tissue showed a preferential Na uptake. The preference for Na over K resulted from a differential depressive effect of Ca on absorption of these two ions. In aged tissue Na uptake was also depressed, but K absorption was accelerated, with a net result of a much greater absorption of K than Na.

The presence of Ca in the aging medium promoted the development of K-absorbing capacity as well as an increase in the rate of respiration but did not influence the loss of capacity to absorb Na as tissue aged. This, along with the demonstration that protein synthesis is involved in the development of K-absorbing capacity by aging tissue, suggests that Ca may have an effect on basic physiological processes concerned with development of ion absorption by aging tissue. The influences that Ca may have on the physical and physiological aspects of ion transport are discussed.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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