title: Calcium nutrition of Sphaerotilus growing in a continuous-flow apparatus.
abstract: Sphaerotilus natans required calcium for the production of sheaths and probably requires calcium for growth as well, though at a lower concentration. Neither strontium nor barium substituted for calcium. S. natans grew attached to the culture vessels of the continuous-flow apparatus even when no sheaths were produced. Tentative evidence showed that the requirement for calcium is shared by the manganese-oxidizing species S. discophorus.
mesh_terms: D001431:Bacteriological Techniques; D001464:Barium / Q000494:pharmacology; D002118:Calcium / Q000378:metabolism*; D002122:Calcium Chloride / Q000378:metabolism / Q000494:pharmacology; D004492:Edetic Acid / Q000494:pharmacology; D006088:Gram-Negative Aerobic Bacteria / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*; D009566:Nitrates / Q000378:metabolism; D013324:Strontium / Q000494:pharmacology
chemical_list: D009566:Nitrates; D001464:Barium; D004492:Edetic Acid; D002122:Calcium Chloride; D002118:Calcium; D013324:Strontium