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Pseudomonas fluorescens HYK0210‐SK09 offers species‐specific biological control of winter algal blooms caused by freshwater diatom Stephanodiscus hantzschii
Author(s) -
Jung S.W.,
Kim B.H.,
Katano T.,
Kong D.S.,
Han M.S.
Publication year - 2008
Publication title -
journal of applied microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.889
H-Index - 156
eISSN - 1365-2672
pISSN - 1364-5072
DOI - 10.1111/j.1365-2672.2008.03733.x
Subject(s) - diatom , pseudomonas fluorescens , biology , phytoplankton , algal bloom , mesocosm , microcystis aeruginosa , botany , bacteria , cyanobacteria , ecology , nutrient , genetics
Aims: The study of an algicidal activity and mechanism of the isolated Pseudomonas fluorescens HYK0210‐SK09 (SK09) against a winter bloomed harmful diatom, Stephanodiscus hantzschii. Methods and Results: SK09 was isolated from the Paldang reservoir, Korea and used to biological control of S. hantzschii . The inoculation of SK09 at the final density of 5 × 10 6 cells ml −1 caused degradation of >90% of S. hantzschii cells within 5 days. The algal cell lysis was achieved by a direct attack of the bacteria to the diatom cells, and the algicidal compound was located in the cytoplasm of the cell. As SK09 did not suppress Microcystis aeruginosa , Anabaena cylindrica , Coelastrum astroideum or Cyclotella meneghiniana , it appeared to attack S. hantzschii in a species‐specific manner. Testing in an indoor mesocosms confirmed that SK09 effectively reduced S. hantzschii cells by 88% within 9 days. Conclusions: This bacterium is useful in regulating blooms of S. hantzschii . However, it should be studied in the future that their impact in shaping phytoplankton community and their activity in natural environments. Significance and Impact of the Study: The bacterium enabled us to develop a new strategy, to understand the interaction for anthropogenic control of harmful algal blooms in nature.