Abstract
SUMMARY: The structure of the cell envelopes in Azotobacter chroococcum and the behaviour and mode of formation of the spore-like cysts suggest that this organism has a close phylogenetic relationship with the Bacillaceae, and that accordingly the main genera of nitrogen-fixing bacteria, Azotobacter, Rhizobium , and Clostridium , have a relatively recent common origin.
Received:
10/05/1955
Published Online:
Thu Dec 01 00:00:00 UTC 1955
© Society for General Microbiology 1955
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