Abstract
Molybdenum deficiency and accumulation was examined in Anabaena oscillarioides (Cyanobacteria). Molybdenum deficiency was induced by: 1) culturing the cyanobacterium on modified Chu-10 (-N) medium containing 4–5 ng Mo · l−1, or 2) adding tungsten to reversibly inactivate dinitrogenase. Stimulation of dinitrogenase activity, while heterocyst frequencies were decreasing, occurred in the range of 5–40 ng · l−1 of added Mo. Molybdenum deficient A. oscillarioides was able to deplete Mo in the medium. This ability was rapidly lost at higher concentrations of added Mo when this cyanobacterium started to accumulate Mo. These results are of potential use in predicting potential Mo limitation in natural environments.
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ter Steeg, P.F., Hanson, P.J. & Paerl, H.W. Growth-limiting quantities and accumulation of molybdenum in Anabaena oscillarioides (Cyanobacteria). Hydrobiologia 140, 143–147 (1986). https://doi.org/10.1007/BF00007567
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DOI: https://doi.org/10.1007/BF00007567