Abstract
Leptolyngbya boryana (L. boryana) is a typical filamentous cyanobacterium that is widely distributed in aquatic ecosystems and is considered to play an important role in the arsenic biogeochemical cycle. Our results showed that L. boryana resisted arsenite (As(III)) and arsenate (As(V)) concentrations up to 0.25 mM and 5 mM, respectively. When exposed to 100 μM As(III) or As(V) for 4 weeks, L. boryana accumulated as much arsenic as 570.0 mg kg−1 and 268.5 mg kg−1, respectively. After the 4-week exposure to As(III) and As(V), organoarsenicals including dimethylarsenate (DMAs(V)) and oxo-arsenosugar-phosphate (Oxo-PO4) were detected in the cells of L. boryana, while inorganic arsenic, especially As(V), was still the main species in both the cells and medium. Furthermore, arsenic oxidation was observed to be solely caused by L. boryana cells and was considered the dominant detoxification pathway. In conclusion, due to its powerful arsenic accumulation, biotransformation, and detoxification abilities, L. boryana might play an important role in arsenic remediation in aquatic environments.
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Acknowledgments
This work was financially supported by the National Natural Science Foundation of China (41807410), and the Scientific Research Funds of Huaqiao University (Z18Y0021), and Guangxi Key Science and Technology Innovation Base on Karst Dynamics (KDL&Guangxi202011).
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Zhu, F., Yang, M., Luo, Zx. et al. Bioaccumulation and biotransformation of arsenic in Leptolyngbya boryana. Environ Sci Pollut Res 27, 29993–30000 (2020). https://doi.org/10.1007/s11356-020-09294-y
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DOI: https://doi.org/10.1007/s11356-020-09294-y