Strontium and Calcium Uptake by the Green Alga, Oocystis eremosphaeria

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Science  25 Sep 1964:
Vol. 145, Issue 3639, pp. 1445-1446
DOI: 10.1126/science.145.3639.1445


The uptake of calcium and strontium by a green unicellular alga cultured in media containing these elements in concentrations found in nature is directly proportional to the concentration in the media. Variation in the concentration of either element has a slight inverse influence on the uptake of the other. The increase of strontium uptake when the calcium concentration is very low indicates that strontium is substituted for calcium when calcium is limited and suggests that the alga requires either element.