Volume 5 Issue 4
Dec.  2012
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Article Navigation >  Water Science and Engineering  > 2012  >  5(4): 375-382
Li YANG, Hiroto MAEDA, Takeshi YOSHIKAWA, Gui-qin ZHOU. 2012: Algicidal effect of bacterial isolates of Pedobacter sp. against cyanobacterium Microcystis aeruginosa. Water Science and Engineering, 5(4): 375-382. doi: 10.3882/j.issn.1674-2370.2012.04.002
Citation: Li YANG, Hiroto MAEDA, Takeshi YOSHIKAWA, Gui-qin ZHOU. 2012: Algicidal effect of bacterial isolates of Pedobacter sp. against cyanobacterium Microcystis aeruginosa. Water Science and Engineering, 5(4): 375-382. doi: 10.3882/j.issn.1674-2370.2012.04.002
shu

Algicidal effect of bacterial isolates of Pedobacter sp. against cyanobacterium Microcystis aeruginosa

doi: 10.3882/j.issn.1674-2370.2012.04.002
  • 1.

    College of Environment, Hohai University, Nanjing 210098, P. R. China

  • 2.

    College of Environment, Nanjing University of Technology, Nanjing 210009, P. R. China

  • 3.

    Laboratory of Microbiology, Faculty of Fisheries, Kagoshima University, Kagoshima 890-0056, Japan

Funds:  This work was supported by the Basic Research Program of Jiangsu Province (Grant No. BK2012828), the grant of Greater Nagoya Project in Environmental Science, and the Open Laboratory Project of Nanjing University of Technology (Grant No. 2012-2013-138).
 
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  • Corresponding author: Li YANG
  • Received Date: 2011-10-13
  • Rev Recd Date: 2012-08-02
    Abstract
  • The aim of this study was to isolate algicidal bacteria so as to control harmful cyanobacterium Microcystis aeruginosa (M. aeruginosa) blooms using biological methods. Nine bacterial strains were isolated to inhibit the growth of M. aeruginosa, among which the MaI11-5 bacterial strain exhibited remarkable algicidal activity against M. aeruginosa cells during the test. Based on the 16S rDNA analysis, the isolated MaI11-5 was identified as Pedobacter sp. through morphology and homology research. The results of cocultivation of the cyanobacteria with MaI11-5 algicidal isolates showed obvious algicidal activity against cyanobacterial cells. The algicidal effect of MaI11-5 exceeded 50% after two days, exceeded 70% after four days, and reached 80% after seven days. The observation results with a scanning electron microscope showed that the cyanobacterial cells aggregated and produced mucous-like substances when cocultivated with the algicidal bacteria. The results indicated that the MaI11-5 bacterial strain may possess a novel function for controlling harmful blooms and further studies will provide new insights into its role in water environment.

     

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