Effect of Strontium Replacement for Calcium on Production of Motile Cells in Protosiphon

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Science  18 Sep 1959:
Vol. 130, Issue 3377, pp. 718
DOI: 10.1126/science.130.3377.718


Protosiphon botryoides Klebs grows without evident zoosporogenesis in inorganic media in which strontium is substituted for calcium. Growth is 50 to 90 percent of that obtained with calcium; when sodium is substituted for calcium, there is no appreciable growth. Motility was observed at or above CaCl2. 2H2O levels of 5 mg/lit., with or without strontium.