Induction of Encystment and Poly-β-Hydroxybutyric Acid Production by Azotobacter chroococcum MAL-201 View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1997-12

AUTHORS

Soma Pal, Anupam Manna, Amal K. Paul

ABSTRACT

Azotobacter chroococcum MAL-201, when grown under nitrogen-free conditions with excess glucose, accumulated poly-beta-hydroxybutyric acid amounting to 75% of cell dry weight at the late exponential phase. This led to induction of encystment, which increased steadily with concomitant intracellular degradation of the polymer. Increase in encystment and PHB production were parallel up to 0.5% (wt/vol) glucose. Further increase in glucose reduced cyst formation but enhanced PHB accumulation. Replacement of glucose by n-butyl alcohol and metabolically related compounds identified crotonate as the best encystment inducer followed by beta-hydroxybutyrate and butyrate, but PHB production was inhibited in general. Supplementation of medium with these compounds enhanced the onset of encystment, and only beta-hydroxybutyrate increased PHB accumulation significantly. More... »

PAGES

327-330

Journal

TITLE

Current Microbiology

ISSUE

6

VOLUME

35

Author Affiliations

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s002849900263

DOI

http://dx.doi.org/10.1007/s002849900263

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1053179562

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/9353215


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