A Fungus Capable of Degrading Microcystin-LR in the Algal Culture of Microcystis aeruginosa PCC7806
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Microcystins (MCs) are a family of natural toxins produced by cyanobacteria (blue-green algae). Microbial degradation is considered an efficient method for eliminating cyanobacteria and MCs in environmental conditions. This study examines the ability of Trichaptum abietinum 1302BG, a white rot fungus, to degrade microcystin-LR in the harmful algal culture of Microcystis aeruginosa PCC7806. Results showed that microcystin-LR could not be detected by high-performance liquid chromatography after 12 h in algal culture incubated with the fungus. There were also high activities of catalase and peroxidase in algal culture incubated with the fungus. However, similar to the control, they decreased to normal levels after 72 h. Meanwhile, the micronucleus test in the toxicity studies revealed that the degraded algal culture had low toxicity.
KeywordsCyanobacteria Trichaptum abietinum 1302BG Microcystin-LR Micronucleus
This work was financial supported by Project of National Basic Research Program of China (2008CB418004) and National Science Foundation of China (30870419).
- 3.Brodkorb, T. S., & Legge, R. L. (1992). Enhanced biodegradation of phenanthrene in oil tar-contaminated soils supplemented with Phanerochaete chrysosporium. Applied and Environmental Microbiology, 58, 3117–3121.Google Scholar
- 10.Harada, K., & Tsuji, K. (1998). Persistence and decomposition of hepatotoxic microcystins produced by cyanobacteria in natural environment. Journal of Toxicology Toxin Review, 17, 385–403.Google Scholar
- 17.Ji, Q., & Chen, Y. F. (1996). Vicia faba root tip micronucleus test on the mutagenicity of water-soluble contents of cigarette smoke. Mutation Research, 359, 1–6.Google Scholar
- 24.Ma, T. H., & Xu, Z. D. (1995). The improved Allium/Vicia root tip micronucleus assay for clastogenicity of environmental pollutants. Mutation Research, 334, 185–195.Google Scholar
- 27.Puerto, M., Prieto, A. L., Pichardo, S., Moreno, I., Jos, A., Moyano, R., & Camean, A. M. (2009). Effects of dietary N-acetylcysteine on the oxidative stress induced in tilapia (Oreochromis niloticus) exposed to a microcystin-producing cyanobacterial water bloom. Environmental Toxicology and Chemistry, 28, 1679–1686.CrossRefGoogle Scholar
- 30.Stanier, R. Y., & Kunisawa, R. (1971). Purification and properties of unicellular blue-green algae (Order Cchroococcales). Bacteriological Reviews, 35, 171–205.Google Scholar