期刊
BIORESOURCE TECHNOLOGY
卷 320, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2020.124379
关键词
Poly-beta-hydroxybutyrate; Cyanobacteria; Bioproducts; Synechocystis sp.; Photosynthesis
资金
- FAPESP [2017/17438-0, 2018/22790-7]
- BEPE fellowship [2018/10811-0]
- Shell Brasil
- FAPESP through the 'Research Centre for Gas Innovation -RCGI' [2014/50279-4]
- ANP (Brazil's National Oil, Natural Gas and Biofuels Agency) through the R&D levy regulation
Research has shown that the cyanobacterium Synechocystis sp. isolated from a contaminated area can produce PHB with high yield of 241 mg L-1 under high light intensity conditions. This condition not only boosts PHB accumulation by 70% compared to other conditions but also enhances cellular duplication rate, maximizing the strain's potential for PHB production.
Poly-beta-hydroxybutyrate (PHB) is a biodegradable biopolymer that may replace fossil-based plastics reducing its negative environmental impact. One highly sustainable strategy to produce these biopolymers is the exploitation of photosynthetic microorganisms that use sunlight and CO2 to produce biomass and subsequently, PHB. Exploring environmental biological diversity is a powerful tool to find resilient microorganisms potentially exploitable to produce bioproducts. In this work, a cyanobacterium (Synechocystis sp.) isolated from a contaminated area close to an important industrial complex was shown to produce PHB under different culture conditions. Carbon, nutrients supply and light intensity impact on biomass and PHB productivity were assessed, showing that the highest yield of PHB achieved was 241 mg L-1 (31%dcw) under high light intensity. Remarkably this condition not only stimulated PHB accumulation by 70% compared to other conditions tested but also high cellular duplication rate, maximizing the potential of this strain for PHB production.
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