Algicidal activity of a dibenzofuran-degrader Rhodococcus sp.

Meng-Hui Wang, Peng Peng, Yu-Mei Liu, Rui-Bao Jia, Li Li

Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Jinan, China.

Journal of microbiology and biotechnology 2013 Feb

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Rhodococcus sp. strain p52, a previously isolated dibenzofuran degrader, could effectively inhibit the growth of cyanobacteria, including species of Microcystis, Anabaena, and Nodularia. When strain p52 was inoculated at the concentration of 7.7×10(7) CFU/ml, 93.5% of exponentially growing Microcystis aeruginosa (7.3×10(6) cells/ml initially) was inhibited after 4 day. The threshold concentration for its algicidal activity against M. aeruginosa was 7.7×10(6) CFU/ml. Strain p52 exerted algicidal effect by synthesizing extracellular substances, which were identified as trans-3-indoleacrylic acid, DL-pipecolic acid, and L-pyroglutamic acid. The effective concentrations of trans-3-indoleacrylic acid and DL-pipecolic acid against M. aeruginosa were tested to be 0.5 mg/l and 5 mg/l, respectively.

Citation

Meng-Hui Wang, Peng Peng, Yu-Mei Liu, Rui-Bao Jia, Li Li. Algicidal activity of a dibenzofuran-degrader Rhodococcus sp. Journal of microbiology and biotechnology. 2013 Feb;23(2):260-6