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Effect of Peptone on Azotobacter Morphology

Overview
Journal J Bacteriol
Publisher American Society for Microbiology
Specialty Microbiology
Date 1972 Jul 1
PMID 4591479
Citations 12
Authors
G R Vela
R S ROSENTHAL
Affiliations
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Abstract

Pleomorphism in cultures of Azotobacter vinelandii was induced by addition of Difco peptone to the growth medium. Under the conditions of the study, 5% peptone gave rise to transient forms described as "fungoid cells" which were osmotically fragile. After some 48 hr of culture, they became osmotically stable and resumed a more typical morphology. It was shown that the pleomorphism-inducing principle in peptone was glycine.

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