Abstract
MICROBIOLOGICAL tests by means of vitamin B12-dependent bacteria and Euglena gracilis have shown that higher plants contain only traces (less than 1 µgm. per 100 gm. dry weight) of vitamin B12, whereas microbiological activity corresponding to 10–50 µgm. vitamin B12 per 100 gm. dry weight has been reported in a number of algae.
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BROWN, F., CUTHBERTSON, W. & FOGG, G. Vitamin B12 Activity of Chlorella vulgaris Beij and Anabaena cylindrical Lemm. Nature 177, 188 (1956). https://doi.org/10.1038/177188a0
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DOI: https://doi.org/10.1038/177188a0
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