HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Franklin, R. E. Search for Related Content PubMed Articles by Franklin, R. E. Agricola Articles by Franklin, R. E.

Effect of Adsorbed Cations on Phosphorus Absorption by Various Plant Species¹

P uptake by excised roots of 10 different plant species was found to be stimulated by a short pretreatment with polyvalent cations, or by raising the ionic strength of the absorbing solution.

The pretreatment consisted of a l-min rinse with 10^–3 N chloride salt solutions prior to exposure to 2 x 10^–5 M KH₂PO₄. Also, the root CEC was estimated by isotopic exchange using a labeled CaCI. solution. The stimulation of P uptake by the polyvalent cation pretreatments was significantly correlated with the amount of P taken up by the control and the root cation exchange capacities. The results supported the hypothesis that the cell wall can act as a negatlvdy charged membrane regulating P uptake.

Key Words: Root CEC • Viets effect • Excised roots

² Professor. The Ohio Agricultural Research and Development Center and The Ohio State University, Columbus, Ohio 43210.

Received for publication July 22, 1969.