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Poly-β-Hydroxybutyrate Production by the Cyanobacterium Scytonema geitleri Bharadwaja under Varying Environmental Conditions

Biomolecules 2019 49 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 35 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Manoj Kumar Singh, K. Pradeep, K. Pradeep, Anuradha Rai, Surendra Singh, Jay Shankar Singh

Summary

A cyanobacterium (blue-green alga) was found to produce a natural biodegradable plastic called PHB, with production rates affected by temperature, pH, and carbon source. This could be relevant to developing bio-based alternatives to petroleum-derived plastics.

The production of poly-β-hydroxybutyrate (PHB) under varying environmental conditions (pH, temperature and carbon sources) was examined in the cyanobacterium Scytonema geitleri Bharadwaja isolated from the roof-top of a building. The S. geitleri produced PHB and the production of PHB was linear with the growth of cyanobacterium. The maximum PHB production (7.12% of dry cell weight) was recorded when the cells of S. geitleri were at their stationary growth phase. The production of PHB was optimum at pH 8.5 and 30 °C, and acetate (30 mM) was the preferred carbon source.

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