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PHOSPHATE UPTAKE BY SYNECHOCOCCUS LEOPOLIENSIS (CYANOPHYCEAE): ENHANCEMENT BY CALCIUM ION 1
Author(s) -
Rigby Cynthia H.,
Craig Susan R.,
Budd Kenneth
Publication year - 1980
Publication title -
journal of phycology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 127
eISSN - 1529-8817
pISSN - 0022-3646
DOI - 10.1111/j.1529-8817.1980.tb03050.x
Subject(s) - phosphate , calcium , synechococcus , biology , metal , saturation (graph theory) , ion , metal ions in aqueous solution , nuclear chemistry , biochemistry , biophysics , cyanobacteria , chemistry , bacteria , genetics , mathematics , organic chemistry , combinatorics
The influence of metallic, cations (added at 10 μM‐1 mM) on the uptake of orthophosphate from 0.2–10 μM solution by Synechococcus leopoliensis (Racib.) Komarek was investigated. All cations tested except Mg 2+ and Zn 2+ stimulated phosphate uptake. The most pronounced stimulation of phosphate uptake was caused by Ca 2+ ·Ca 2+ markedly decreased the half‐saturation concentration for orthophosphate uptake, apparently by acting upon the metabolic processes of phosphate transport into the cell. Phosphate did not influence Ca 2+ fluxes across the cell‐surface.