Summary
Experiments were made to investigate the influence exerted by calcium, strontium, cobalt and molybdenum on the growth and nitrogen fixation of a local strain of Nostoc commune.
Calcium, cobalt and molybdenum at least in micro amounts were found to be required for the achievement of best growth and highest nitrogen fixation.
Calcium seems to be irreplaceable by strontium, the latter element exerted a strong inhibitory action on both growth and nitrogen fixation processes.
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Taha, E.E.M., Elrefai, A.E.M.H. Physiological and biochemical studies on nitrogen fixing blue-green algae. Archiv. Mikrobiol. 43, 67–75 (1962). https://doi.org/10.1007/BF00408396
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DOI: https://doi.org/10.1007/BF00408396