The Relation of External Rubidium Concentration to Amounts and Rates of Uptake by Excised Potato Tuber Tissue.

Conceptual Developments in Membrane Transport, 1924-1974

“…Considerably after this, Higinbotham and Hanson (36) confirmed that K+ accumulation by potato slices closely conforms to the Freundlich adsorption curve. Other similar cases can be cited (36).…”

Investigations of Ion Uptake by Tissue Slices

“…In the determination of ion accumnlation by .storage tissue, there are two main sources of error, (a) in the method of aeration, (b) in the quantitative procedure itself. The problem of adequate aeration, especially where there is a tendency for tissue .slices to overlap, has evoked some argument (Asprey 1937, Steward and Harrison 1939, Steward and Berry 1943, and Higinbotham and Hanson 1955. Where forced aeration is employed, spraying of the solution is sometimes encountered.…”

The Possible Role of Adenosine Triphosphate in Rubidium Absorption as Revealed by the Influence of External Phosphate, Dinitrophenol and Arsenate.

“…Previous work has shown that Rb+ is absorbed by excised tissues (3,4, and 13) much as in the case of potassium and that after a more rapid initial uptake the amount of cation uptake parallels that of anion absorption (13). Also Rb8fi appears to be a suitable tracer for K+ in short term experiments (6).…”