Concurrent enhancement of biomass production and phycocyanin content in salt-stressed Arthrospira platensis : A glycine betaine- supplementation approach
Chemosphere, ISSN: 0045-6535, Vol: 353, Page: 141387
2024
- 11Citations
- 14Captures
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Metrics Details
- Citations11
- Citation Indexes11
- 11
- Captures14
- Readers14
- 14
Article Description
In industrial-scale cultivation of microalgae, salinity stress often stimulates high-value metabolites production but decreases biomass yield. In this research, we present an extraordinary response of Arthrospira platensis to salinity stress. Specifically, we observed a significant increase in both biomass production (2.58 g L −1 ) and phycocyanin (PC) content (22.31%), which were enhanced by 1.26-fold and 2.62-fold, respectively, compared to the control, upon exposure to exogenous glycine betaine (GB). The biochemical analysis reveals a significant enhancement in carbonic anhydrase activity and chlorophyll a level, concurrent with reductions in carbohydrate content and reactive oxygen species (ROS) levels. Further, transcriptomic profiling indicates a downregulation of genes associated with the tricarboxylic acid (TCA) cycle and an upregulation of genes linked to nitrogen assimilation, hinting at a rebalanced carbon/nitrogen metabolism favoring PC accumulation. This work thus presents a promising strategy for simultaneous enhancement of biomass production and PC content in A. platensis and expands our understanding of PC biosynthesis and salinity stress responses in A. platensis.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0045653524002807; http://dx.doi.org/10.1016/j.chemosphere.2024.141387; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85186265138&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/38331268; https://linkinghub.elsevier.com/retrieve/pii/S0045653524002807; https://dx.doi.org/10.1016/j.chemosphere.2024.141387
Elsevier BV
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