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Algicidal Activity of Substance Purified from Marine Bacteria Metabolites against Cochlodinium polykrikoides

  • Byun Hee-Guk (Department of Chemistry, Pukyong National University) ;
  • Jeong Seong-Youn (Department of Microbiology, Pukyong National University) ;
  • Park Young-Tae (South Sea Fisheries Research Institute, National Fisheries Research and Development Institute) ;
  • Lee Won-Jae (Department of Microbiology, Pukyong National University) ;
  • Kim Se-Kwon (Department of Chemistry, Pukyong National University)
  • Published : 2002.09.01

Abstract

Marine bacteria producing algicidal substance against Cochlodinium polykrikoides was screened and isolated from seawater. Metabolite of marine bacteria Micrococcus sp. LG-5 showed strong algicidal activity against C. polykrikoides. C. polykrikoides was inhibited above $90\%$ at $5\%$ solution of the metabolite within 24 hrs. Algicidal substance from the metabolite was extracted with ethyl acetate, and then purified by PTLC and reversed-phase HPLC. Algicidal activity of purified compound against C. polykrikoides was above $90\%$ at 3.7, 11.0 and 33.0${\mu}g/mL$ concentration after 12, 9 and 3 hrs, respectively. Ninety percent inhibition of other red tides, Gymnodinium sanguineum and Gyrodinium impudicum was observed when treated with 3.7${\mu}g/mL$ of purified compound within a period of 12 hrs. The microscopic view of red tides treated with purified compound showed the deformations such as cell node cuts and swelling of cells.

Keywords

References

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