Abstract
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1.
During an investigation of the physiology of Azotobacter vinelandii with particular reference to polysaccharide formation, a suitable medium which was precipitate-free was developed by adding EDTA at a concentration of 50 mg/l to a basal medium containing one of eight different carbohydrates as sole carbon source.
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2.
Acetylated alginate was always produced by the organism when cultured under defined conditions, regardless of the carbohydrate source incorporated in the basal medium.
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3.
When EDTA was added to the medium, the bacteria produced acetylated polyuronides with a preponderance of mannuronic acid residues.
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4.
A comparison of the infrared spectra of the alginate produced by Azotobacter vinelandii and the affect of EDTA upon the mannuronic acid/guluronic acid ratios of the alginate are reported.
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Couperwhite, I., McCallum, M.F. The influence of EDTA on the composition of alginate synthesized by Azotobacter vinelandii . Arch. Microbiol. 97, 73–80 (1974). https://doi.org/10.1007/BF00403047
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DOI: https://doi.org/10.1007/BF00403047